Variegated dye effects on cellulose textiles - made by successive applic-ation of reactive dyes combined with resist agents

摘要

A printing paste is first applied, contg. (A) (thio)-sulphate or thiourea as resist agent, (B) alkali is fixing agent, and (C) reactive dye which is unaffected by (A). A second printing paste or padding bath is then applied over the top, contg. (D) reactive dye which reacts with (A) to prevent fixing, and (B) alkali as fixing agent. After drying, the treated fabric is fixed by exposure to steam or hot air. Alternative methods consist of (1) applying a paste or dye bath contg. (D) and overprinting with a paste contg. (A) and (C), (2) printing with a paste contg. (A) and (B), and then applying a paste or bath contg. (B), (C) and (D), or (3) applying a paste or bath contg. (B), (C) and (D) and then overprinting with a paste contg. (A) and (B). The process is simple, reproducible and allows a wide range of shades and multi-colour effects to be produced.