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Water Conservation—An Alternative to Solvent Dyeing?
Author(s) -
Lister G. H.
Publication year - 1972
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1972.tb03032.x
Subject(s) - dyeing , padding , pulp and paper industry , solvent , foaming agent , process (computing) , substrate (aquarium) , process engineering , materials science , chemistry , chemical engineering , composite material , computer science , organic chemistry , engineering , oceanography , geology , porosity , operating system
Textiles can be dyed using appreciably less water than is normal in conventional dyeing if satisfactory distribution of the dye‐liquor can be obtained, e.g. by padding. Padding techniques are, however, unsuitable for many types of material, because of their construction or the economics of the process. However, by converting small volumes of water into large volumes of micro‐foam in the body of the substrate, by the addition of a foaming agent to the dye‐liquor, even distribution of the liquor can be obtained in a relatively short time. Subsequent heating fixes the dye to give level well‐penetrated dyeings. The principle is also applicable to preparatory and finishing processes. Because of the efficiency of the distribution system, dyes can be applied by this technique (the Sancowad process) which, because of their properties, cannot be applied evenly in long liquors. The method has proved satisfactory on garments, half‐hose, and short lengths of fabric in bulk application with loads up to 50 kg.