Colorants ( both dyes and pigments ) are listed using a dual classification which use the "'Colour Index Generic Name "'( the prime identifier ) and "'Colour Index Constitution Numbers " '.
22.
Colorants ( both dyes and pigments ) are listed using a dual classification which use the "'Colour Index Generic Name "'( the prime identifier ) and "'Colour Index Constitution Numbers " '.
23.
The variations in infrared brightness compared to visual brightness correspond quite well to the light curve, suggesting that brightness changes are related to colour or extinction changes, but there has been a secular trend in the B-V colour index.
24.
119 Tauri has a semiregular variable star and its brightness varies from magnitude + 4.23 to + 4.54 with a period of 165 days . With a colour index of + 2.07, it is one of the reddest naked eye stars in the night sky.
25.
In U . S . P . # 5, 096, 801 Koya " et al . ", of Fuji Photo Film company, list some 150-200 chemical structures, mainly azo dyes and pyrazolone-diazenyl, but fail to provide chemical names, CAS Registry numbers, or Colour Index numbers.
26.
:Googling for got me lots of patents, like this one, which say things like " the coloring material comprises at least one selected from the group consisting of C . I . Direct Yellow 86, C . I . Acid Yellow 23, C . I . Direct Yellow 173, and C . I . Direct Yellow 59 ", which refer to dyes standardized in the Colour Index International, some of which are listed at list of dyes .-- Sean 13 : 50, 26 February 2009 ( UTC)
27.
To remedy this confusion, in 1990 the art materials industry voluntarily began listing pigment ingredients on the paint packaging, using the common pigment name ( such as " cobalt blue " or " cadmium red " ), and / or a standard pigment identification code, the "'generic color index name "'( PB28 for cobalt blue, PR108 for cadmium red ) assigned by the Society of Dyers and Colourists ( UK ) and the American Association of Textile Chemists and Colorists ( USA ) and known as the Colour Index International.
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