Method of producing multicolor dyeings
AssigneeSandoz Ltd.
InventorLewis M. Redd, Jr.
Life of this patent
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Abstract
Multicolored substrates, particularly nylon carpeting, are produced by applying combinations of a colorless reserving agent and an acid, direct or basic dye or mixture of dyes and fixing the reserving agent and the dye(s) simultaneously.
Claims54
In a process which comprises applying to a substrate dyeable with an anionic dye (1) a reserving agent which is a colorless organic compound containing a group which is reactive with the available basic groups of the substrate and further containing a sulfonic acid or carboxylic acid group and (2) one or more dyes selected from the group consisting of acid, direct and basic dyes and mixtures thereof and fixing the applied compounds on the material comprising said substrate, the reserving agent being applied to less than the whole of the substrate, and at least one dye and reserving agent being applied to at least one common area of the substrate, the improvement wherein the reserving agent and the dye or dyes are simultaneously fixed.
A process of creating multicolored effects in materials which are dyeable with anionic dyes which comprises treating the material with an anionic dye, treating a portion of a material which is treated with the dye with a reserving agent before said dye has been fixed, said reserving agent portion of material to which both have been applied and changing the anionic dye receptivity of said common portion, exposing the thus treated material to a dye fixing treatment which fixes the anionic dye on those portions of the material from which it has not been displaced without fixing at least some of said dye in the portion from which it has been displaced and washing the thus treated material.
Dependencies are inferred from the claim text.