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Hand-colouring (or hand-coloring) refers to any method of manually adding colour to a
monochrome photograph Monochrome photography is photography where each position on an image can record and show a different ''amount'' of light, but not a different hue. It includes all forms of black-and-white photography, which produce images containing shades of n ...
, generally either to heighten the realism of the image or for artistic purposes. Hand-colouring is also known as hand painting or overpainting. Typically,
watercolours Watercolor (American English) or watercolour (British English; see spelling differences), also ''aquarelle'' (; from Italian diminutive of Latin ''aqua'' "water"), is a painting method”Watercolor may be as old as art itself, going back to ...
,
oils An oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is hydrophobic (does not mix with water) & lipophilic (mixes with other oils). Oils are usually flammable and surface active. Most oils are unsaturate ...
,
crayons A crayon (or wax pastel) is a stick of pigmented wax used for writing or drawing. Wax crayons differ from pastels, in which the pigment is mixed with a dry binder such as gum arabic, and from oil pastels, where the binder is a mixture of wax a ...
or
pastels A pastel () is an art medium in a variety of forms including a stick, a square a pebble or a pan of color; though other forms are possible; they consist of powdered pigment and a binder. The pigments used in pastels are similar to those use ...
, and other paints or dyes are applied to the image surface using brushes, fingers,
cotton swab Cotton is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus ''Gossypium'' in the mallow family Malvaceae. The fiber is almost pure cellulose, and can contain minor perc ...
s or
airbrush An airbrush is a small, Pneumatics, air-operated tool that Atomizer nozzle, atomizes and sprays various media, most often paint but also ink and dye, and Foundation (cosmetics), foundation. Spray painting developed from the airbrush and is c ...
es. Hand-coloured photographs were most popular in the mid- to late-19th century before the invention of
colour photography Color photography is photography that uses media capable of capturing and reproducing colors. By contrast, black-and-white or gray- monochrome photography records only a single channel of luminance (brightness) and uses media capable only of ...
and some firms specialised in producing hand-coloured photographs.


History


Pre-1900

Monochrome A monochrome or monochromatic image, object or palette is composed of one color (or values of one color). Images using only shades of grey are called grayscale (typically digital) or black-and-white (typically analog). In physics, monochrom ...
(black and white)
photography Photography is the art, application, and practice of creating durable images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film. It is employe ...
was first exemplified by the daguerreotype in 1839 and later improved by other methods including: calotype, ambrotype,
tintype A tintype, also known as a melainotype or ferrotype, is a photograph made by creating a direct positive on a thin sheet of metal coated with a dark lacquer or enamel and used as the support for the photographic emulsion. Tintypes enjoyed their ...
, albumen print and gelatin silver print. The majority of photography remained monochrome until the mid-20th century, although experiments were producing
colour photography Color photography is photography that uses media capable of capturing and reproducing colors. By contrast, black-and-white or gray- monochrome photography records only a single channel of luminance (brightness) and uses media capable only of ...
as early as 1855 and some photographic processes produced images with an inherent overall colour like the blue of
cyanotype The cyanotype (from Ancient Greek κυάνεος - ''kuáneos'', “dark blue” + τύπος - ''túpos'', “mark, impression, type”) is a slow-reacting, economical photographic printing formulation sensitive to a limited near ultraviolet ...
s. In an attempt to create more realistic images, photographers and artists would hand-colour monochrome photographs. The first hand-coloured daguerreotypes are attributed to Swiss painter and printmaker
Johann Baptist Isenring Johann Baptist Isenring (12 May 1796, Lütisburg - 9 April 1860, St. Gallen) was a Swiss landscape painter and printer. He was also the first Daguerrotypist in Switzerland. Life and work As a boy, he completed a carpentry apprenticeship in Z ...
, who used a mixture of
gum arabic Gum arabic, also known as gum sudani, acacia gum, Arabic gum, gum acacia, acacia, Senegal gum, Indian gum, and by other names, is a natural gum originally consisting of the hardened sap of two species of the ''Acacia'' tree, '' Senegalia se ...
and
pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compou ...
s to colour daguerreotypes soon after their invention in 1839. Coloured powder was fixed on the delicate surface of the daguerreotype by the application of heat. Variations of this technique were patented in
England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...
by Richard Beard in 1842 and in
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...
by Étienne Lecchi in 1842 and Léotard de Leuze in 1845. Later, hand-colouring was used with successive photographic innovations, from albumen and gelatin silver prints to
lantern slides The magic lantern, also known by its Latin name , is an early type of image projector that used pictures—paintings, prints, or photographs—on transparent plates (usually made of glass), one or more lenses, and a light source. Because a si ...
and transparency photography. Parallel efforts to produce coloured photographic images affected the popularity of hand-colouring. In 1842 Daniel Davis Jr. patented a method for colouring daguerreotypes through electroplating, and his work was refined by Warren Thompson the following year. The results of the work of Davis and Thompson were only partially successful in creating colour photographs and the electroplating method was soon abandoned. In 1850 Levi L. Hill announced his invention of a process of daguerreotyping in natural colours in his ''Treatise on Daguerreotype''. Sales of conventional uncoloured and hand-coloured daguerreotypes fell in anticipation of this new technology. Hill delayed publication of the details of his process for several years, however, and his claims soon came to be considered fraudulent. When he finally did publish his treatise in 1856, the process – whether bona fide or not – was certainly impractical and dangerous. With the advent of photographic emulsions on glass came the potential to make enlargements from them, but for the lack of a sufficiently strong light source to project them on to the receiving emulsion as prints on paper, canvas or other supports. The solar camera, employing the focussed light of the sun, addressed the problem in a repurposing of the solar microscope by American portrait artist David Acheson Woodward in 1857, and others, before being superseded by enlargers employing artificial light sources from the 1880s. Life-size portraits made by this means were hand coloured in crayon or overpainted in oils and were popular into the 1910s. Hand-colouring remained the easiest and most effective method to produce full-colour photographic images until the mid-20th century when American
Kodak The Eastman Kodak Company (referred to simply as Kodak ) is an American public company that produces various products related to its historic basis in analogue photography. The company is headquartered in Rochester, New York, and is incorpor ...
introduced
Kodachrome Kodachrome is the brand name for a color reversal film introduced by Eastman Kodak in 1935. It was one of the first successful color materials and was used for both cinematography and still photography. For many years Kodachrome was widely used ...
colour film.


Japanese hand-coloured photographs (circa 1860–1899)

Though the hand-colouring of photographs was introduced in
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...
, the technique gained considerable popularity in Japan, where the practice became a respected and refined art form beginning in the 1860s. It is possible that photographer Charles Parker and his artist partner William Parke Andrew were the first to produce such works in Japan, but the first to consistently employ hand-colouring in the country were the photographer
Felice Beato Felice Beato (1832 – 29 January 1909), also known as Felix Beato, was an Italian–British photographer. He was one of the first people to take photographs in East Asia and one of the first war photographers. He is noted for his genre works, ...
and his partner, ''The Illustrated London News'' artist and colourist
Charles Wirgman Charles Wirgman (31 August 1832 - 8 February 1891) was an English artist and cartoonist, the creator of the ''Japan Punch'' and illustrator in China and Meiji period-Japan for the ''Illustrated London News''. Wirgman was the eldest son of Ferdi ...
.Henisch. (1996). p. 201. In Beato's studio the refined skills of
Japanese Japanese may refer to: * Something from or related to Japan, an island country in East Asia * Japanese language, spoken mainly in Japan * Japanese people, the ethnic group that identifies with Japan through ancestry or culture ** Japanese diaspor ...
watercolourists and woodblock printmakers were successfully applied to European photography, as evidenced in Beato's volume of hand-coloured portraits, ''Native Types''. Another notable early photographer in Japan to use hand-colouring was
Yokoyama Matsusaburō was a pioneering Japanese photographer, artist, lithographer and teacher. Yokoyama was born Yokoyama Bunroku () in Iturup (then under Japanese control) on 10 October 1838. Early in his life, Yokoyama and his family moved to Hakodate, where in 1 ...
. Yokoyama had trained as a painter and lithographer as well as a photographer, and he took advantage of his extensive repertoire of skills and techniques to create what he called ''shashin abura-e'' (写真油絵) or "photographic oil paintings", in which the paper support of a photograph was cut away and oil paints then applied to the remaining emulsion. Later practitioners of hand-colouring in Japan included the firm of Stillfried & Andersen, which acquired Beato's studio in 1877 and hand-coloured many of his negatives in addition to its own. Austrian Baron Raimund von Stillfried und Ratenitz, trained Japanese photographer and colorist
Kusakabe Kimbei Kusakabe Kimbei (日下部 金兵衛; 1841–1934) was a Japanese photographer. He usually went by his given name, Kimbei, because his clientele, mostly non-Japanese-speaking foreign residents and visitors, found it easier to pronounce than his ...
, and together they created hand-coloured images of Japanese daily life that were very popular as souvenirs. Hand-coloured photographs were also produced by
Kusakabe Kimbei Kusakabe Kimbei (日下部 金兵衛; 1841–1934) was a Japanese photographer. He usually went by his given name, Kimbei, because his clientele, mostly non-Japanese-speaking foreign residents and visitors, found it easier to pronounce than his ...
, Tamamura Kozaburō,
Adolfo Farsari Adolfo Farsari (; 11 February 1841 – 7 February 1898) was an Italian photographer based in Yokohama, Japan. His studio, the last notable foreign-owned studio in Japan, was one of the country's largest and most prolific commercial photograph ...
,
Uchida Kuichi was a pioneering Japanese photographer from Nagasaki. He was greatly respected as a portrait photographer and was the only photographer granted a sitting to photograph the Emperor Meiji. Uchida was adopted at the age of 13, following his fath ...
, Ogawa Kazumasa and others. Many high-quality hand-coloured photographs continued to be made in Japan well into the 20th century.


Post-1900

The so-called golden age of hand-coloured photography in the western hemisphere occurred between 1900 and 1940. The increased demand for hand-coloured landscape photography at the beginning of the 20th century is attributed to the work of Wallace Nutting. Nutting, a New England minister, pursued hand-coloured landscape photography as a hobby until 1904, when he opened a professional studio. He spent the next 35 years creating hand-coloured photographs, and became the best-selling hand-coloured photographer of all time.Ivankovich. (2005). p. 12 Between 1915 and 1925 hand-coloured photographs were popular among the middle classes in the United States, Canada, Bermuda and the Bahamas as affordable and stylish wedding gifts, shower gifts, holiday gifts, friendship gifts, and vacation souvenirs. With the start of the Great Depression in 1929, and the subsequent decrease in the numbers of the middle class, sales of hand-coloured photographs sharply diminished. Despite their downturn in popularity, skilled photographers continued to create beautifully hand-coloured photographs. Hans Bellmer's hand-coloured photographs of his own doll sculptures from the 1930s provide an example of continued hand-colouring of photographs in Europe during this time. In Poland, the Monidło is an example of popular hand-coloured wedding photographs. Another hand-colour photographer, Luis Márquez (1899–1978), was the official photographer for and art adviser of the Mexican Pavilion at the 1939-40 World’s Fair. In 1937 he presented Texas Governor
James V. Allred James Burr V AllredThe "V" was a name, not an initial. (March 29, 1899 – September 24, 1959) was the 33rd governor of Texas. He later served, twice, as a United States district judge of the United States District Court for the Southern Distri ...
a collection of hand-coloured photographs. The National Autonomous University of Mexico in Mexico City has an extensive Luis Márquez photographic archive, as does the
University of Houston The University of Houston (UH) is a public research university in Houston, Texas. Founded in 1927, UH is a member of the University of Houston System and the university in Texas with over 47,000 students. Its campus, which is primarily in s ...
in Texas. By the 1950s, the availability of colour film stopped the production of hand-coloured photographs. The upsurge in popularity of antiques and collectibles in the 1960s, however, increased interest in hand-coloured photographs. Since about 1970 there has been something of a revival of hand-colouring, as seen in the work of such artist-photographers as Robin Renee Hix, Elizabeth Lennard,
Jan Saudek Jan Saudek (born 13 May 1935) is an art photographer and painter. Jan Saudek's art work represents a unique technique combining photography and painting. In his country of origin, Czechoslovakia, Jan was considered a disturbed artist and oppres ...
, Kathy Vargas, and Rita Dibert. Robert Rauschenberg's and others' use of combined photographic and painting media in their art represents a precursor to this revival. In spite of the availability of high-quality colour processes, hand-coloured photographs (often combined with
sepia toning In photography, toning is a method of altering the color of black-and-white photographs. In analog photography, it is a chemical process carried out on metal salt-based prints, such as silver prints, iron-based prints (cyanotype or Van Dyke b ...
) are still popular for aesthetic reasons and because the pigments used have great permanence. In many countries where colour film was rare or expensive, or where colour processing was unavailable, hand-colouring continued to be used and sometimes preferred into the 1980s. More recently,
digital image processing Digital image processing is the use of a digital computer to process digital images through an algorithm. As a subcategory or field of digital signal processing, digital image processing has many advantages over analog image processing. It allo ...
has been used – particularly in advertising – to recreate the appearance and effects of hand-colouring. Colourisation is now available to the amateur photographer using image manipulation software such as Adobe Photoshop or Gimp.


Materials and techniques


Dyes

Basic dyes are used in the hand-colouring of photographs. Dyes are soluble colour substance, either natural or synthetic, in an aqueous solution, as opposed to pigments which are generally insoluble colour substance in an aqueous suspension.
Aniline dye Aniline is an organic compound with the formula C6 H5 NH2. Consisting of a phenyl group attached to an amino group, aniline is the simplest aromatic amine. It is an industrially significant commodity chemical, as well as a versatile starting m ...
s, the first synthetically produced dyes originally used for the dyeing of textiles, were first used to dye albumen prints and glass transparency photographs in Germany in the 1860s. When hand-colouring with dyes, a weak
solution Solution may refer to: * Solution (chemistry), a mixture where one substance is dissolved in another * Solution (equation), in mathematics ** Numerical solution, in numerical analysis, approximate solutions within specified error bounds * Soluti ...
of dye in water is preferred, and colours are often built up with repeated washes rather than being applied all at once. The approach is to ''stain'' or ''dye'' the print rather than to ''paint'' it, as too much paint will obscure photographic details. Blotting paper is used to control the amount of dye on the surface by absorbing any excess.


Watercolours

Watercolour paint has the virtue of being more permanent than dyes, but is less transparent and so more likely to obscure details. Hand-colouring with watercolours requires the use of a medium to prevent the colours from drying with a dull and lifeless finish. Before the paint can be applied, the surface of the print must be primed so that the colours are not repelled. This often includes prepping the print with a thin coating of shellac, then adding grit before colouring. Watercolour paint used in photographic hand-colouring consists of four ingredients: pigments (natural or synthetic), a binder (traditionally
arabic gum Gum arabic, also known as gum sudani, acacia gum, Arabic gum, gum acacia, acacia, Senegal gum, Indian gum, and by other names, is a natural gum originally consisting of the hardened sap of two species of the ''Acacia'' tree, '' Senegalia se ...
), additives to improve plasticity (such as
glycerine Glycerol (), also called glycerine in British English and glycerin in American English, is a simple triol compound. It is a colorless, odorless, viscous liquid that is sweet-tasting and non-toxic. The glycerol backbone is found in lipids known ...
), and a solvent to dilute the paint (i.e.
water Water (chemical formula ) is an Inorganic compound, inorganic, transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living ...
) that evaporates when the paint dries. The paint is typically applied to prints using a soft brush. Watercolours often "leave a darker edge of color at the boundaries of the painted area."Johnston. (2004)
Hand-coloring of nineteenth century photographs
.
Since different pigments have varying degrees of transparency, the choice of colours must be considered carefully. More transparent pigments are preferred, since they ensure greater visibility of the photographic image.


Oils

Oil paint Oil paint is a type of slow-drying paint that consists of particles of pigment suspended in a drying oil, commonly linseed oil. The viscosity of the paint may be modified by the addition of a solvent such as turpentine or white spirit, and va ...
contains particles of pigment applied using a
drying oil A drying oil is an oil that hardens to a tough, solid film after a period of exposure to air, at room temperature. The oil hardens through a chemical reaction in which the components crosslink (and hence, polymerize) by the action of oxygen (no ...
, such as linseed oil. The conventions and techniques of using
oils An oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is hydrophobic (does not mix with water) & lipophilic (mixes with other oils). Oils are usually flammable and surface active. Most oils are unsaturate ...
demands a knowledge of drawing and
painting Painting is the practice of applying paint, pigment, color or other medium to a solid surface (called the "matrix" or "support"). The medium is commonly applied to the base with a brush, but other implements, such as knives, sponges, and ai ...
, so it is often used in professional practice. It is necessary to
size Size in general is the magnitude or dimensions of a thing. More specifically, ''geometrical size'' (or ''spatial size'') can refer to linear dimensions ( length, width, height, diameter, perimeter), area, or volume. Size can also be m ...
the print first to prevent absorption of the colours into the paper. In the past, photographic lantern slides were often coloured by the manufacturer, though sometimes by the user, with variable results. Usually, oil colours were used for such slides, though in the
collodion Collodion is a flammable, syrupy solution of nitrocellulose in ether and alcohol. There are two basic types: flexible and non-flexible. The flexible type is often used as a surgical dressing or to hold dressings in place. When painted on the skin, ...
era – from 1848 to the end of the 19th century – sometimes watercolours were used as well.


Crayons and pastels

The use of
crayon A crayon (or wax pastel) is a stick of pigmented wax used for writing or drawing. Wax crayons differ from pastels, in which the pigment is mixed with a dry binder such as gum arabic, and from oil pastels, where the binder is a mixture of wax a ...
or pastel sticks of ground pigments in various levels of saturation is also considered a highly skilled colourist's domain, as it requires knowledge of drawing techniques. Like oils, crayons and pastels generally obscure the original photograph, which produces portraits more akin to traditional paintings. The Photo-crayotype, Chromotypes and Crayon Collotypes were all used to colourise photographs by the application of crayons and pigments over a photographic impression. Charcoal and coloured pencils are also used in hand-colouring of photographs and the terms crayon, pastel, charcoal, and pencil were often used interchangeably by colourists. Hand-coloured photographs sometimes include the combined use of dyes, water-colours, oils, and other pigments to create varying effects on the printed image. Regardless of which medium is used, the main tools to apply colour are the brush and fingertip. Often the dabbing finger is covered to ensure that no fingerprints are left on the image.


Preservation and storage

In general, the preservation of hand-coloured photographs is similar to that of colour and monochrome photography. Optimal storage conditions include an environmentally controlled climate with low
relative humidity Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity dep ...
(approximately 30-40% RH), temperatures under 68 degrees Fahrenheit (20 degrees Celsius), and a low concentration of particulate pollution, such as sulfuric acid,
nitric acid Nitric acid is the inorganic compound with the formula . It is a highly corrosive mineral acid. The compound is colorless, but older samples tend to be yellow cast due to decomposition into oxides of nitrogen. Most commercially available nitri ...
, and
ozone Ozone (), or trioxygen, is an inorganic molecule with the chemical formula . It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope , breaking down in the lo ...
.Library of Congress. (2007)
''Caring for your photographic collections''
Accessed 22 November 2010.
The storage area must also be clean and free of
pests PESTS was an anonymous American activist group formed in 1986 to critique racism, tokenism, and exclusion in the art world. PESTS produced newsletters, posters, and other print material highlighting examples of discrimination in gallery represent ...
and mould. Because hand-coloured photographs, like colour photographs, are more sensitive to light and UV radiation, storage should be in a dark location. The storage area should be secure and monitored for internal threats – such as change in temperature or humidity due to HVAC malfunction, as well as external threats, such as
theft Theft is the act of taking another person's property or services without that person's permission or consent with the intent to deprive the rightful owner of it. The word ''theft'' is also used as a synonym or informal shorthand term for som ...
or natural disaster. A disaster plan should be created and maintained for all materials. When handling cased photographs such as
daguerreotypes Daguerreotype (; french: daguerréotype) was the first publicly available photographic process; it was widely used during the 1840s and 1850s. "Daguerreotype" also refers to an image created through this process. Invented by Louis Daguerre an ...
, albumen prints, and
tintypes ''Tintypes'' is a musical revue conceived by Mary Kyte with Mel Marvin and Gary Pearle. Description With its time frame set between the turn of the 20th century and the onset of World War I, this chamber piece with a cast of five provides a mus ...
, especially ones that have been hand-coloured, caution is required. They are fragile and even minimal efforts to clean them can irreparably damage the image. Hand-coloured cased photographs should be stored horizontally, in a single layer, preferably faced down. Cases can be wrapped with alkaline or buffered tissue paper. If the photograph has become separated from its case, a mat and backing board can be cut from alkaline buffered museum board. The mat is placed between the image and a newly cut glass plate while the backing board supports the image from behind. This "sandwich" is then sealed with Filmoplast tape. Commercial glass cleaners should not be used on new glass plates. Loose hand-coloured tintypes can be placed between mat boards. If bent, no attempt should be made to straighten them as this could cause the emulsion to crack and/or lift. Ideally, all photographic prints should be stored horizontally, although prints under 11"x14" and on stable mounts can be safely stored vertically. Prints should be stored away from light and water sources in acid-free, lignin-free boxes manufactured conforming to
International Organization for Standardization The International Organization for Standardization (ISO ) is an international standard development organization composed of representatives from the national standards organizations of member countries. Membership requirements are given in Art ...
(ISO) Standards 14523 (superseded in 2007 by ISO 18916) and 10214. Storage materials should pass the American National Standards Institute (ANSI)
Photographic Activity Test Photographic Activity Test (PAT) is an ISO standard test detailed in ISO 18916:2007 (E), updated in 2007. Previous versions of the standard were numbered ISO 14523:1999(E). Current as of 2020 The test evaluates materials for archival quality and ...
(PAT), or similar standards, to ensure archival quality. If a photograph exhibits flaking or chipping emulsion it should not be stored in a plastic enclosure as static electricity could further damage the image. Clean cotton gloves should be worn when handling photographs to prevent skin oils and salts from damaging the surfaces. In some cases it may be necessary to contact a professional conservator. In the United States, the American Institute for Conservation of Historic and Artistic Works (AIC) provides a tool that helps identify local conservation services. In the United Kingdom and Ireland, the Conservation Register provides a similar tool that searches by specialization, business, and surname. To locate other conservation services internationally, Conservation OnLine (CoOL) Resources for Conservation Professionals provides a tool that searches by country.


Colouring materials

Dyes and
watercolours Watercolor (American English) or watercolour (British English; see spelling differences), also ''aquarelle'' (; from Italian diminutive of Latin ''aqua'' "water"), is a painting method”Watercolor may be as old as art itself, going back to ...
require similar preservation measures when applied to hand-coloured photographs. Like the photographs themselves, watercolours and dyes applied by hand to photographs are susceptible to light damage and must be housed in dark storage or displayed under dim, indirect light. Common particulate pollutants can cause watercolour pigments to fade, but the paint surface can be cleaned by lightly dusting with a soft brush to remove dirt. Oil paint was often applied to
tintype A tintype, also known as a melainotype or ferrotype, is a photograph made by creating a direct positive on a thin sheet of metal coated with a dark lacquer or enamel and used as the support for the photographic emulsion. Tintypes enjoyed their ...
s, daguerreotypes, and ambrotypes. As with all photographs, the materials respond negatively to direct light sources, which can cause pigments to fade and darken, and frequent changes in
relative humidity Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity dep ...
and
temperature Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measurement, measured with a thermometer. Thermometers are calibrated in various Conversion of units of temperature, temp ...
, which can cause the oil paint to crack. For photographs with substantial damage, the expertise of an oil paintings conservator might be required for treatment.
Crayon A crayon (or wax pastel) is a stick of pigmented wax used for writing or drawing. Wax crayons differ from pastels, in which the pigment is mixed with a dry binder such as gum arabic, and from oil pastels, where the binder is a mixture of wax a ...
and pastel hand-coloured photographs have a powdery surface which must be protected for preservation purposes. Historically, crayon and pastel coloured photographs were sold in a frame under a protective layer of glass, which was often successful in reducing the amount of handling and smudging of the photograph surface. Any conservation work on crayon or pastel colour-photographs must retain these original frames and original glass to maintain the authenticity and value of the object. If the photograph is separated from its original enclosure, it can be stored in an archival quality folder until it is framed or cased.


Auxiliary materials

In the United States, many commercially sold, hand-coloured photographs were packaged and framed for retail sale. Early 20th century hand-coloured photographs were often mounted on mat-board, placed behind a glass frame, and backed by wood panel slats, cardboard, or heavy paperboard. A backing sheet was often glued to the back of the mat-board. Unfortunately, the paper products produced and used during the late-19th and early-20th centuries are highly
acidic In computer science, ACID ( atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a ...
and will cause yellowing, brittling and degradation of hand-coloured photographs. Metallic inclusions in the paper can also
oxidize Redox (reduction–oxidation, , ) is a type of chemical reaction in which the oxidation states of substrate change. Oxidation is the loss of electrons or an increase in the oxidation state, while reduction is the gain of electrons or a d ...
which may be the cause of
foxing Foxing is an age-related process of deterioration that causes spots and browning on old paper documents such as books, postage stamps, old paper money and certificates. The name may derive from the fox-like reddish-brown color of the stains, or ...
in paper materials. Wood panel slats will also off-gas causing further degradation of the photographs. Simple conservation of these fragile materials can be carried out by the adventurous amateur. A hand-coloured photograph should be removed from the frame, retaining any original screws or nails holding the frame together. Wood panels, acidic cardboard slats, and acidic backing paper can be removed from the frame and mat-board and discarded, retaining any identifying information such as stamps or writing on the backing paper. The mat-board on which the photograph is mounted, even though acidic in nature, cannot be removed and replaced due to the intrinsic value of this original mounting. Often the artist's signature and the title of the photograph are inscribed on the mat-board. The best way to limit degradation is to store the photograph in a cool, dry atmosphere with low light. The hand-coloured photograph should be replaced in its original frame, held in place with archival quality acid-free paper paperboard, and closed with the original nails or screws.


Related techniques

Hand-colouring should be distinguished from ''tinting'', ''toning'', ''retouching'', and ''crystoleum''. * Tinted photographs are made with dyed printing papers produced by commercial manufacturers. A single overall colour underlies the image and is most apparent in the highlights and mid-tones. From the 1870s
albumen Egg white is the clear liquid (also called the albumen or the glair/glaire) contained within an egg. In chickens it is formed from the layers of secretions of the anterior section of the hen's oviduct during the passage of the egg. It forms aro ...
printing papers were available in pale pink or blue, and from the 1890s gelatin-silver printing-out papers in pale mauve or pink were available. There were other kinds of tinted papers as well. Over time such colouration often becomes very faded. * Toning refers to a variety of methods for altering the overall colour of the photographic image itself. Compounds of gold, platinum or other metals are used in combination with variations in development time, temperature and other factors to produce a range of tones, including warm browns, purples, sepias, blues, olives, red-browns and blue-blacks. A well-known type of toning is
sepia tone In photography, toning is a method of altering the color of black-and-white photographs. In analog photography, it is a chemical process carried out on metal salt-based prints, such as silver prints, iron-based prints (cyanotype or Van Dyke br ...
. Besides adding colour to a monochromatic print, toning often improves image stability and increases contrast. * Retouching uses many of the same tools and techniques as hand-colouring, but with the intent of covering damage, hiding unwanted features, accentuating details, or adding missing elements in a photographic print. In a portrait retouching could be used to improve a sitter's appearance, for instance, by removing facial blemishes, and in a landscape with an overexposed sky, clouds could be painted into the image. Water-colours, inks, dyes and chemical reducers are used with such tools as
scalpel A scalpel, lancet, or bistoury is a small and extremely sharp bladed instrument used for surgery, anatomical dissection, podiatry and various arts and crafts (either called a hobby knife or an X-acto knife.). Scalpels may be single-use dispos ...
s, pointed brushes, airbrushes and retouching pencils. * The crystoleum, from "crystal" + "oleum" (oil), process was yet another method of applying colour to albumen prints.Ritzenthaler. (2006). p. 39. The print was pasted face down to the inside of a concave piece of glass. Once the adhesive (usually starch paste or gelatin) was dry, the paper backing of the print was rubbed away, leaving only the transparent emulsion on the glass. The image was then coloured by hand. Another piece of glass was added to the back and this could also be coloured by hand. Both pieces of glass were bound together creating a detailed, albeit fragile, image.


See also

*
Film colorization Film colorization (American English; or colourisation [British English], or colourization [Canadian English and Oxford English]) is any process that adds color to black-and-white, sepia, or other monochrome moving-picture imag ...
*
Film tinting Film tinting is the process of adding color to black-and-white film, usually by means of soaking the film in dye and staining the film emulsion. The effect is that all of the light shining through is filtered, so that what would be white light bec ...
* Handschiegl colour process * Photochrom(e) * Photograph conservation *
Photo manipulation Photograph manipulation involves the transformation or alteration of a photograph using various methods and techniques to achieve desired results. Some photograph manipulations are considered to be skillful artwork, while others are consider ...
*
Preservation (library and archival science) In library and archival science, preservation is a set of preventive conservation activities aimed at prolonging the life of a record, book, or object while making as few changes as possible. Preservation activities vary widely and may include m ...
* Selective colour


References


Further reading

* Baldwin, G. (1991). ''Looking at photographs: A guide to technical terms''. Malibu, Calif: J. Paul Getty Museum in association with British Museum Press, p. 7, 35, 55, 58, 74, 80-82. * Jones, B. E. (1974). ''Encyclopedia of photography: With a new picture portfolio''. New York: Arno Press, p. 132-134. * Lavédrine, B. (2009). ''Photographs of the past: Process and preservation''. Los Angeles: Getty Conservation Institute. * Miki, Tamon. (1997). Concerning the arrival of photography in Japan. ''The advent of photography in Japan''. Tokyo: Tokyo Metropolitan Foundation for History and Culture, Tokyo Metropolitan Museum of Photography, p. 11. * Nadeau, L. (1994). ''Encyclopedia of printing, photographic, and photomechanial processes: A comprehensive reference to reproduction technologies : containing invaluable information on over 1500 processes : Vols. 1 & 2 - A-Z''. New Brunswick: Atelier Luis Nadeau, p. 33. * Reilly, J. M. (2009). ''Care and identification of 19th century photographs''. Rochester, NY: Eastman Kodak Co. * Ruggles, M. (1985). Paintings on a photographic base. ''Journal of the American Institute for Conservation'' 24(2), p. 92-103.


External links


Brooklyn MuseumFlickr Collection

The George Eastman HouseFlickr Collection

The Field MuseumFlickr Collection

Nagasaki University Library; Japanese Old Photographs in Bakumatsu-Meiji Period

National Science and Media MuseumFlickr Collection

Collection of hand-colored photographs by Luis Marquez in the 1930s
at the University of Houston Digital Library {{DEFAULTSORT:Hand-Colouring Of Photographs Photographic techniques Color