Efficient application method of isatis root plant dye in loose fiber dyeing

Abstract

The invention discloses an efficient application method of isatis root plant dye in loose fiber dyeing, which comprises the steps of 1, preparing nitrogen; 2, mounting a stainless steel valve above working liquid level, and a check valve at the top; 3, dyeing loose fiber plants for the first time, and filtering to obtain residual dye liquor after dyeing; 4, adding the residual dye liquor; 5, introducing the nitrogen through the stainless steel valve; 6, carrying out continuous vat dyeing on the loose fiber plants, filtering to obtain residual dye liquor, and then carrying out oxidation fixation on the loose fiber plants needing color fixation; and 7, adding the residual dye liquor in the step 6 into an empty loose fiber dyeing machine or an empty melting tank or an empty storage tank or anempty dyeing auxiliary vat, and returning to the step 5. According to the invention, the light fastness of the blue plant dye is improved, the blue plant dye can be applied to large-scale industrialproduction to replace part of chemical dyes for dyeing, so that the plant dye is greatly saved, water is saved, the environment is protected, and the isatis root plant dye can be efficiently used.

Description

technical field [0001] The invention relates to a method for efficiently using Radix isatidis plant dyes for dyeing loose fibers. Background technique [0002] Isatis root, also known as woad, is a commonly used traditional Chinese medicine suitable for large-scale cultivation in the north. Its fresh stems and leaves are naturally fermented to make natural plant dyes, which are the most used plant dyes. The dyeing process of the blue vegetable dye is a reduction oxidation process, and the dye uptake rate of the vegetable dye is lower than 60%, that is, more than 40% of the vegetable dye cannot be fully used after each dyeing, wasting resources, and the remaining dyed If the liquid is discharged, it will pollute the environment. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide an efficient use method of isatidis plant dye for loose fiber dyeing. [0004] In order to achieve the above obje...

AI Technical Summary

Problems solved by technology

The dyeing process of the blue vegetable dye is a reduction oxidation process, and the dye uptake rate of the vegetable dye is lower than 60%, that is, more than 40% of the vegetable dye cannot be fully used after each dyeing, wasting resources, and the remaining dyed If the liquid is discharged, it will pollute the environment