Indigo paste industrial preparation method

Abstract

The invention discloses an indigo paste industrial preparation method, comprising a first step of raw material preparation, wherein mature indigo stems and foliages are cut into small parts by using a guillotine or a fiber cutter; a second step of raw material soaking, wherein the small parts are placed in a fermentation tank, fresh water is added for immersion, lime milk or industrial base is further added and thoroughly evenly stirring is carried out; a third step of sealed fermentation, wherein the fermentation tank is covered with a thin film for the sealed fermentation; a fourth step of impurities removal and standing, wherein after fermentation, fermentation broth is continuously turned and stirred, residue of the stems and foliages is then removed by filtering, and an indigo solution in the fermentation tank is discharged into a settlement tank for standing; and a fifth step of water filtering, wherein the indigo paste is obtained after a precipitate in the bottom of the settlement tank undergoes the water filtering. The method utilizes natural plant resources to prepare dye material through an industrial method, and the problem that the indigo dye preparation is troublesome is solved. With the method of the invention, the product has good and stable quality, treatment of three wastes is centralized, environmental pollution is reduced, and product cost is reduced. The method lays a foundation for batik product development.

Description

technical field [0001] The present invention relates to dyes, specifically, to the raw materials of dyes, and further to indigo dyes. technical background [0002] Indigo is a plant of the acanthaceae Ma blue ( Baphicacanthus cusia Brem ) powder or agglomerates obtained by processing the leaves, and the leaves of cruciferous plants Isatis indica, Grass Daqing, and leguminous plants indigo can also be obtained from blue indigo. [0003] As we all know, the dyes used in the dyeing industry are almost all chemical synthetic dyes, such as reactive dyes, acid dyes, direct dyes, cationic dyes and so on. Some chemical dyes pose a threat to human health, some of which can be decomposed into toxic aromatic amines, pentachlorophenol, and some dyes are prone to skin allergies. Natural dyes are non-toxic and harmless, non-allergic and carcinogenic to the skin, and have good biodegradability and environmental compatibility; their color is soft and natural. [0004] Historically, the d...

AI Technical Summary

Problems solved by technology

However, indigo dye also has its own defects: one is that the processing and production of the dye is cumbersome, and many processes are required from collecting Malan leaves to being used as a dye; Mixing can cause color stains

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