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Tintometer
The Tintometer Limited was founded in 1885 by Joseph Williams Lovibond, the son of a prominent brewery owner in Greenwich, London. J.W. Lovibond developed the world's first practical colorimeter as a means of ensuring the high quality of his beer. By the time of his death in 1918 he had established himself as a pioneer in the field of colour science and his company, The Tintometer Limited, was already known throughout the world for its range of instrumentation and expertise in the field of colorimetry. The company continued to grow in strength and as advances were made both in colour science research and in instrument development Lovibond standards became specific for many products worldwide. Sources The Tintometer LtdColour Measurement See also * Degrees Lovibond * Harold Horton Sheldon Harold Horton Sheldon (April 13, 1893 – December 23, 1964) was a Canadian-American physicist, scientist, inventor, teacher, editor and author. He was a science editor who wrote on futuristic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Williams Lovibond
Joseph Williams Lovibond (17 November 1833 – 21 April 1918) was a British brewer who developed the world's first practical colorimeter as a means of ensuring the high quality of his beer. He was the originator of the Degrees Lovibond When drinking beer, there are many factors to be considered. Principal among them are bitterness, the variety of flavours present in the beverage and their intensity, alcohol content, and colour. Standards for those characteristics allow a more ... scale. Biography After accidentally losing his earnings from gold mining as a teenager, Lovibond went to work in his family's brewery. He discovered that coloration was a good index for assessing the quality of beer, and sought an accurate way of gauging color. After failed experiments with paint, on solids, a visit to Salisbury Cathedral in 1880 gave him the inspiration to use stained glass for his colorimeter, which he introduced in 1885. Business In 1885 he founded a company, The Tintomete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenwich
Greenwich ( , ,) is a town in south-east London, England, within the ceremonial county of Greater London. It is situated east-southeast of Charing Cross. Greenwich is notable for its maritime history and for giving its name to the Greenwich Meridian (0° longitude) and Greenwich Mean Time. The town became the site of a royal palace, the Palace of Placentia from the 15th century, and was the birthplace of many Tudors, including Henry VIII and Elizabeth I. The palace fell into disrepair during the English Civil War and was demolished to be replaced by the Royal Naval Hospital for Sailors, designed by Sir Christopher Wren and his assistant Nicholas Hawksmoor. These buildings became the Royal Naval College in 1873, and they remained a military education establishment until 1998 when they passed into the hands of the Greenwich Foundation. The historic rooms within these buildings remain open to the public; other buildings are used by University of Greenwich and Trinity Laban C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Romans as '' Londinium'' and retains its medieval boundaries.See also: Independent city § National capitals The City of Westminster, to the west of the City of London, has for centuries hosted the national government and parliament. Since the 19th century, the name "London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London, governed by the Greater London Authority.The Greater London Authority consists of the Mayor of London and the London Assembly. The London Mayor is distinguished fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorimeter (chemistry)
A colorimeter is a device used in Colorimetry (chemical method), colorimetry that measures the absorbance of particular wavelengths of light by a specific Solution (chemistry), solution. It is commonly used to determine the concentration of a known solute in a given solution by the application of the Beer–Lambert law, which states that the concentration of a solute is proportional to the absorbance. Construction The essential parts of a colorimeter are: * a light source (often an ordinary low-voltage filament lamp); * an adjustable aperture; * a set of colored Filter (optics), filters; * a cuvette to hold the working solution; * a detector (usually a photoresistor) to measure the transmitted light; * a meter to display the output from the detector. In addition, there may be: * a voltage regulator, to protect the instrument from fluctuations in Mains power systems, mains voltage; * a second light path, cuvette and detector. This enables comparison between the working solut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorimetry
Colorimetry is "the science and technology used to quantify and describe physically the human color perception". It is similar to spectrophotometry, but is distinguished by its interest in reducing spectra to the physical correlates of color perception, most often the CIE 1931 XYZ color space tristimulus values and related quantities. History The Duboscq colorimeter was invented by Jules Duboscq in 1870. Instruments Colorimetric equipment is similar to that used in spectrophotometry. Some related equipment is also mentioned for completeness. * A tristimulus colorimeter measures the tristimulus values of a color. * A spectroradiometer measures the absolute spectral radiance (intensity) or irradiance of a light source. * A spectrophotometer measures the spectral reflectance, transmittance, or relative irradiance of a color sample. * A ''spectrocolorimeter'' is a spectrophotometer that can ''calculate'' tristimulus values. * A densitometer measures the degree of light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degrees Lovibond
When drinking beer, there are many factors to be considered. Principal among them are bitterness, the variety of flavours present in the beverage and their intensity, alcohol content, and colour. Standards for those characteristics allow a more objective and uniform determination to be made on the overall qualities of any beer. Colour "Degrees Lovibond" or "°L" scale is a measure of the colour of a substance, usually beer, whiskey, or sugar solutions. The determination of the degrees Lovibond takes place by comparing the colour of the substance to a series of amber to brown glass slides, usually by a colorimeter. The scale was devised by Joseph Williams Lovibond. The Standard Reference Method (SRM) and European Brewery Convention (EBC) methods have largely replaced it, with the SRM giving results approximately equal to the °L. The Standard Reference Method or SRM is a system modern brewers use to measure colour intensity, roughly darkness, of a beer or wort. The method ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harold Horton Sheldon
Harold Horton Sheldon (April 13, 1893 – December 23, 1964) was a Canadian-American physicist, scientist, inventor, teacher, editor and author. He was a science editor who wrote on futuristic subjects, especially pertaining to human space travel. Early life Sheldon was born on April 13, 1893, and raised in Brockville, Ontario. His parents were Harvey Sheldon and Mary Christian (Laqeau) Sheldon. The Sheldons immigrated to the United States in 1917. Education Sheldon attended Queen's University in Kingston, Ontario where he received his Bachelor of Arts degree in 1916 and Master of Arts degree in 1917. He received his Ph.D. in 1920 from the University of Chicago and was an assistant professor of physics there 1918 and 1919. He later attended Brooklyn Polytechnic Institute in New York City and received a degree in electrical engineering in 1934. Career Sheldon became a physics instructor at the University of Michigan in 1922. He served as science editor of The New York He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
