Cowboy wash water in the ice (acid) wash Introduction [clothing dyeing and finishing]

In practice, such a method will be found - pumice is used as a carrier to absorb the chemicals on the garments to peel off the color. This peeling only removes the color of the upper layer of the surface of the denim garment and gives the garment a frosty appearance. Indigo and high-quality sulfur dyes are best suited for this popular style.

The ice (acid) washing process of cowboy washing water is as follows:

1. Soak pumice stone in potassium permanganate solution for at least 1-2 hours. Typical concentrations in commercial applications range from 1.5% to 5% (which can be replaced with 5%-10% sodium hypochlorite).

2. Pumice should be drained of excess solution. They can be soaked in nets or mesh fabrics, then removed and drained. Another method is to put the pumice stone and some "waste cloth" into the tumbler and roll for a few minutes to remove the excess solution. The third method is to use pre-impregnated pumice stone or material purchased from a supplier. Pumice can take a variety of shapes and its performance levels are related to the chemicals and additives that are produced.

3. Put pumice stone and clothing into the washing machine (clothing should be refined or desizing, drying or micro tide).

4, rolling 10-30min, or until a satisfactory result. The results are related to dyes, fabrics and chemical reagents, pumice, additives, equipment and other factors.

5. Sometimes pumice can be reused for the next batch of clothing before re-soaking, depending on the hole in the pumice stone. This is beneficial for the transfer of garments between devices and can reduce the number of machines used in the cold wash process.

6. If potassium permanganate is used, manganese dioxide (brown/orange) will form and need to be removed with reducing agents such as sodium bisulfite, hydroxylamine sulfate and hydrogen peroxide. The washing machine was filled with water and 1-5 g/L of reducing agent was added. Heat to 50°C for 20 minutes. This process is usually repeated twice to ensure complete removal of manganese dioxide. When sodium hypochlorite is used, the remaining chlorine needs to be removed with sodium bisulfite or hydrogen peroxide. The chemical treatment of jeans after the next sequence of processing, will enhance the contrast.

7, rinse

8. Repeat step 6 if necessary.

9, soft processing.

10. Tumble dry.

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