A PROCESS FOR DYEING DIRECTLY A TEXTILE FABRIC IN SITU

摘要

The present invention relates to a 3- indolol salt that directly dyes a textile fabric by being oxidized into indigo in situ instead of indigo and leucoindigo the method for preparation the same and its application for dyeing directly a textile fabric by being oxidized into indigo in situ. The present invention further relates to a dye composition including -indolol salt for textile fabric and its application, that is a method for oxidizing 3-indolol salt into indigo in situ and dyeing directly a textile fabric. Therefore, it is possible for the composition and method of the present invention to simplify the conventional process into one' 'step, in which indolol salt is converted into indigo by reducing-oxidizing repeatedly. As a result, it simplifies process, saves the alkali and hydros consumed in repeat oxidation-reduction, saves manpower and material resources, enhances the utilization of capacity and reduces the cost as well as is beneficial to environmental protection and market competition accordingly.