Hatching (french: hachure) is an artistic technique used to create tonal or

shading Shading refers to the depiction of depth perception in 3D models (within the field of 3D computer graphics) or illustrations (in visual art) by varying the level of darkness. Shading tries to approximate local behavior of light on the ob ...

effects by drawing (or painting or scribing) closely spaced

parallel lines In geometry, parallel lines are coplanar straight lines that do not intersect at any point. Parallel planes are planes in the same three-dimensional space that never meet. ''Parallel curves'' are curves that do not touch each other or int ...

. (It is also used in monochromatic representations of heraldry to indicate what the

tincture A tincture is typically an extract of plant or animal material dissolved in ethanol (ethyl alcohol). Solvent concentrations of 25–60% are common, but may run as high as 90%.Groot Handboek Geneeskrachtige Planten by Geert Verhelst In chemistr ...

of a "full-colour" emblazon would be.) When lines are placed at an angle to one another, it is called cross-hatching. Hatching is especially important in essentially linear media, such as drawing, and many forms of printmaking, such as

engraving Engraving is the practice of incising a design onto a hard, usually flat surface by cutting grooves into it with a burin. The result may be a decorated object in itself, as when silver, gold, steel, or glass are engraved, or may provide an in ...

etching Etching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (incised) in the metal. In modern manufacturing, other chemicals may be used on other types ...

and

woodcut Woodcut is a relief printing technique in printmaking. An artist carves an image into the surface of a block of wood—typically with gouges—leaving the printing parts level with the surface while removing the non-printing parts. Areas tha ...

. In

Western art The art of Europe, or Western art, encompasses the history of visual art in Europe. European prehistoric art started as mobile Upper Paleolithic rock and cave painting and petroglyph art and was characteristic of the period between the Paleo ...

, hatching originated in the

Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire ...

, and developed further into cross-hatching, especially in the old master prints of the fifteenth century.

Master ES Master E. S. (c. 1420 – c. 1468; previously known as the ''Master of 1466'') is an unidentified German engraver, goldsmith, and printmaker of the late Gothic period. He was the first major German artist of old master prints and was greatly ...

and

Martin Schongauer Martin Schongauer (c. 1450–53, Colmar – 2 February 1491, Breisach), also known as Martin Schön ("Martin beautiful") or Hübsch Martin ("pretty Martin") by his contemporaries, was an Alsatian engraver and painter. He was the most important ...

in engraving and

Erhard Reuwich Erhard Reuwich ( nl, Reeuwijk) was a Dutch artist, as a designer of woodcuts, and a printer, who came from Utrecht but then worked in Mainz. His dates and places of birth and death are unknown, but he was active in the 1480s. He came from a famil ...

and

Michael Wolgemut Michael Wolgemut (formerly spelt ''Wohlgemuth''; 143430 November 1519) was a German painter and printmaker, who ran a workshop in Nuremberg. He is best known as having taught the young Albrecht Dürer. The importance of Wolgemut as an artist res ...

in woodcut were pioneers of both techniques, and Albrecht Dürer in particular perfected the technique of crosshatching in both media. Artists use the technique, varying the length, angle, closeness and other qualities of the lines, most commonly in drawing, linear painting and engraving.

Technique

The main concept is that the quantity, thickness and spacing of the lines will affect the brightness of the overall image and emphasize forms creating the illusion of

volume Volume is a measure of occupied three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre) or by various imperial or US customary units (such as the gallon, quart, cubic inch). Th ...

. Hatching lines should always follow (i.e. wrap around) the form. By increasing quantity, thickness and closeness, a darker area will result. An area of shading next to another area which has lines going in another direction is often used to create contrast. Line work can be used to represent colors, typically by using the same type of hatch to represent particular tones. For example, red might be made up of lightly spaced lines, whereas green could be made of two layers of

perpendicular In elementary geometry, two geometric objects are perpendicular if they intersect at a right angle (90 degrees or π/2 radians). The condition of perpendicularity may be represented graphically using the ''perpendicular symbol'', ⟂. It ca ...

dense lines, resulting in a realistic image. Crosshatching is the technique of using line to shade and create value.

Variations

Representation of materials

technical drawing Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed. Technical drawing is essential for communicating ideas in industry and engineering ...

, the section lining American National Standard for Section Lining ANSI Y14.2M-1979 (R1987) may indicate the material of a component part of an assembly. Many hatching patterns have been standardized by the American National Standards Institute (ANSI) and the

International Standards Organization 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), though there are many other predefined patterns that may be used. Thus, the hatching pattern of steel varies from that of aluminum, copper, etc. The patterns are not only for metals. Patterns for grass, gravel, brick, and others are frequently found on architectural drawings. File:Cam follower-stud style.png,

Cross section Cross section may refer to: * Cross section (geometry) ** Cross-sectional views in architecture & engineering 3D *Cross section (geology) * Cross section (electronics) * Radar cross section, measure of detectability * Cross section (physics) **Abs ...

of a cam follower stud. Notice the double lines for the steel pattern of the "outer race" component. Also, the commonly used pattern of diagonal lines and variations of it are shown. File:Philadelphia County Prison (Moyamensing Prison) Philadelphia PA (AD5) 00005a.jpg, A drawing from the 1960s. Partial hatching on the stone facade is used for clarity.

References

Works cited

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External links