The Year-book for Colorists and Dyers, Volume 81906 - Dyes and dyeing |
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Page 49
A still further group of dyestuffs were not reducable at all , and the alizarine colors were changed to red or ... The substitution of a persulphate for chromic acid was found to be advantageous on account of the color of the latter .
A still further group of dyestuffs were not reducable at all , and the alizarine colors were changed to red or ... The substitution of a persulphate for chromic acid was found to be advantageous on account of the color of the latter .
Page 50
Color restored on exposure to air . Color not restored by air , but on oxidation with persulphate . Color not restored either by air or persulphate . Not altered by hydrosulphite . Not discolorized , but changed to brown , Original ...
Color restored on exposure to air . Color not restored by air , but on oxidation with persulphate . Color not restored either by air or persulphate . Not altered by hydrosulphite . Not discolorized , but changed to brown , Original ...
Page 52
The tests should be carried out exactly as described . In making “ stripping tests ” the degree of stripping is judged by comparing the depth of shade remaining with that of the original pattern . The color of the stripping solution is ...
The tests should be carried out exactly as described . In making “ stripping tests ” the degree of stripping is judged by comparing the depth of shade remaining with that of the original pattern . The color of the stripping solution is ...
Page 53
With most dyestuffs which form air - oxidizable leuco compounds , the color returns immediately or in a few minutes , but with others a longer time is required . The reaction is accelerated by exposing the pattern to ammonia ...
With most dyestuffs which form air - oxidizable leuco compounds , the color returns immediately or in a few minutes , but with others a longer time is required . The reaction is accelerated by exposing the pattern to ammonia ...
Page 55
A. Much color is stripped - Basic dyestuff . Boil with hydrosulphite B. X. Decolorized . Color is not restored by air or by persulphate . Azo Group No. 4 — Chrysoidine , Tannin Orange , Janus Yellow . Y. Not decolorized or only very ...
A. Much color is stripped - Basic dyestuff . Boil with hydrosulphite B. X. Decolorized . Color is not restored by air or by persulphate . Azo Group No. 4 — Chrysoidine , Tannin Orange , Janus Yellow . Y. Not decolorized or only very ...
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Common terms and phrases
acetic acid action added addition Agent or Name Alizarine alkali ammonia Anilin Anthracene apparatus assignor bath Black Blue body Boil Brilliant Brown carbonate CD CD CD cent chlorid Chrome color coloring-matters combination compounds conc consists containing cotton crystals Cyanine Dark dated Diamine Direct DISCHARGE dissolved Dye Method dyed dyestuff employed extra fabric Fast fibre gallons Germany Green heated hydrosulphite Indigo invention relates Lakes machine Maker manufacture material Math WGS means Methyl mixed mixture mordant Mz WGS Name of Dye obtained Orange oxidizing paste Patent PK WGS pounds powder preferably prepared present printing quantity reaction reducing salts Scarlet shades soda sodium soluble solution steam suitable Sulphur sulphuric acid temperature Thiogene treated Violet washing WCh WCh WGS WGS WGSCh wool Yellow yield York Ву