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Spun silk and cashmere with bath homochromy effect
Spun silk and cashmere blend products, in the upper part of the international price of pure cashmere products is also high. When the proportion of silk more than 30%, silk dyeing is not deep, is a very serious problem, mainly due to the pre-spun factors accounted for 30% of the wire itself structural factors accounting for 70%, from the screening dyes, additives and Factors such as conditions to be satisfied with the results of the same color.

Degumming of silk, many enterprises are still recommended basic law, although this method can spun on 30% of the basic sericin Tuojin can, but after the degumming silk serious injury. Acid dye uptake increased more than 30%, and after weight loss degumming process only one-fourth of the alkaline. Most of spun silk bleaching, but often after bleaching caused by difficulties in dyeing, bleaching chloride on the Great Silk injury, it is best to restore the use of bleach, to reduce the damage spun silk, silk increase in the uptake and improve the benefit of the same color. Silk in order to weight gain, wrinkle-free, and so the purpose of improving the hand, often in the dyeing ago to deal with variability, in most cases, degeneration of post-dyed silk has become difficult, by selecting the puffing, penetration aids, such as silk can increase the uptake .

The multi-level structure of the silk and cashmere with the surface area of the huge difference is caused by the same color difference between the two main reasons. The silk is six times the surface area is cashmere, silk and usually a capacity of only one-third of the cashmere, only managed to fine fibers, silk or even plastic and silk-emergence of swelling enough to allow dye infiltration and promote pollution Before making silk dyeing Dye doubled or even several times the growth of silk and cashmere with the color effect will be ideal. Therefore, the choice of puffing agent, agent, leveling agent of particular importance. 
  
In short, so that the silk cashmere with a good bath with the same color effect, to be used in the dyeing before the hydrophobic fiber swelling agent to choose the appropriate agent, the low-temperature dyeing auxiliaries, neutral salt, and the amount of leveling agent; selection Hydrophobic stronger, larger molecular weight of acid dyes on silk or high-Siti with the essential nature of color; reasonable control of pH value and the highest temperature dyeing and holding time.
[From: internet][Author: unknown][Update: 08-08-25]