PROCESS FOR THE DYEING OF COTTON AND OTHER CELLULOSIC SUBSTRATES WITH LAC DYE

摘要

The present invention relates to a process for the dyeing of cotton and other cellulosic substrates in the form of fibres, yarn, fabrics, garments, floor coverings and the like with lac dye which for the first time on a commercial scale is successful in obtaining deep, bright, wash-fast dyeings on such substrates. The process resides in the subjection of such fibres or fabrics before and/or after the dyeing thereof to a unique sequence of treatment steps involving the application of cationic agents and metallic mordants to the substrates. These treatment steps are carried out within carefully regulated temperature ranges and for predetermined periods of time.