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The change in color of artists' oil paints caused by the vehicle was determined by normal aging and by an accelerated method. Two cycles causing yellowing followed by exposure to normal room illumination were conducted. Color is reported by the ASTM D 1925 Yellowness Index. Tested were linseed...
A method of detecting and quantifying defective colour vision using the Lovibond Colour Vision Analyzer is described. The results obtained in tests on 120 subjects, including 20 colour defectives, are discussed and compared with results from the Ishihara Test Plates.
The concept of color temperature has been used for many years to characterize the relative spectral distribution of energy from light sources. Since not all sources of light are blackbody radiators, the term “correlated color temperature” was devised to indicate the temperature of the blackbody...
An international intercomparison of the results of chromaticity and photometric measurements on retroreflecting materials was made to assess the accuracy of such measurements with current laboratory techniques. A representative group of 44 samples in six colours, including both enclosed and...
A major problem in the coatings industry is the preparation and maintenance of standards to be used in the shading of colored products. With the introduction of color‐measuring instrumentation interfaced directly to dedicated digital computers, the storing of reflectance data as numerical color...
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