The analysis of dyestuffs and their identification in dyed and coloured materials, lake-pigments, foodstuffs, etc (1916)
Green, Arthur G. (Arthur George), 1864-1941 · London : C. Griffin · leaf 121
86 ANALYSIS OF DYESTUFFS. accurately measuiing depth of colour on fabrics, we are also faced with the fact that the dyestuifs accompanying the Indigo are not necessarily blue but are frequently violet or red. In the absence of a more accurate colour-measuring instrument, results of sufficient… … Three ^PQrture Tin fometer Fig. 2. This instrument consists of a double tube, through one eye-piece of which the pattern is viewed, through the other a piece of white material. Between the latter and the eye can be interposed a series of standard coloured glasses, red, yellow, and blue, by means of…
Dyes and dyeing
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