What are the methods and steps of tie dyeing?

1, pretreatment before dyeing, desizing to remove the branch pulp. Alkaline solution, oxidant or amylase can be used for cooking and desizing. The purpose of refining is to remove natural impurities and residual pulp from the fiber and boil it with caustic soda and water. Bleaching is used to remove pigments and residual impurities. Sodium hypochlorite or hydrogen peroxide is often boiled with water. Cloth bleached with an electric iron, used for drawing and binding.

2. Bundle dyeing: mark the designed pattern on the cloth with drawing powder or trace the pattern with drawing liquid, and then bundle or sew the cloth. When finished, soak it in water and take it out to dry a little. When it does not drip, put it into the prepared dye solution or soak or cook it for a certain period of time, then rinse it with clear water and dry it.

3. Post-dyeing treatment: after drying, the bundle can be untied when it is not completely dried, and ironed with an iron when it is wet.

Knotting skills:

1. Binding method: the binding method is to bind the fabric with cotton or hemp rope according to the preset idea, or pick up a little, or follow a long strip, or go through various folding treatments.

2. Folding tie-dyeing method: it is the most widely used technique in tie-dyeing, and the folded fabric becomes a symmetrical single pattern after tie-dyeing; After repeated folding, two continuous patterns can be made.

3. Flat stitch method: Flat stitch method can form current patterns, stripes, patterns and leaf shapes. Injection threading, evenly stretching the designed pattern on the cloth, and then tightening it. This is a convenient and free method, which can fully express the designer's creative intention.

4. Needle-winding sewing method: A diagonal dot pattern can be obtained by sewing with needle and cloth.

5. Ligation method: Ligation method is to tie the fabric diagonally, fold and bend it in different ways, and then tighten it, thus blocking the infiltration of dye solution. The ways of knotting are: four-corner knotting, oblique knotting, and knotting at any position.