MANUFACTURING METHOD FOR DISCHARGE PRINTING AGENT AND A NEW DISCHARGE PRINTING AGENT PROUDCED BY THE MANUFACTURING METHOD

摘要

PURPOSE: A manufacturing method of a discharge printing agent and the new discharge printing agent manufactured thereby are provided to improve light fastness of textiles without degradation of discharging printing. CONSTITUTION: A manufacturing method of a discharge printing agent comprises the following steps: increasing temperature of poly oxyethylene glycol to 75 ~ 85°C; adding citric acid or maleic acid in the temperature-ascended polyoxyethylene glycol; maintaining the temperature of the polyoxyethylene glycol to 75 ~ 85°C; adding dicyandiamide or melamine in materials; maintaining the temperature of the materials to 55 ~ 65°C until the materials are dissolved; and dissolving triethanolamine, triclorobenzen and fluorescent brightener in the materials.