Wool fabric is a common fabric that is often used to make jackets, coats and other clothing. The following are the dyeing techniques for woolen fabrics:
1. Pre-dyeing treatment: Before dyeing, woolen fabrics can be pre-treated. Pre-treatment includes steps such as washing, bleaching and fading to ensure that the wool fabric surface is clean, stain-free and to remove unwanted colors.
2. Selection of dye: Select the appropriate dye according to the required color effect and fabric composition. Woolen fabrics can use various dyes, such as acid dyes, direct dyes, vat dyes, etc. Different dyes are suitable for different colors and compositions.
3. Dyeing method:
– Soaking dyeing: Soak the woolen fabric completely in the dye solution. You can use a large container or Professional dye vat. As the soaking time increases, the dyeing effect will become more saturated.
– Fabric roll dyeing: Put the woolen fabric and dye together into the drum dyeing machine, and the dye will evenly penetrate into the fabric through rotation.
– Spray dyeing: Use spray equipment to evenly spray the dye on the surface of the woolen fabric to dye it evenly.
– Hand dyeing: You can use manual methods to dye details in small areas or specific parts, such as folds, creases or patterns.
4. Acid-base adjustment: Depending on the needs of the dye, acid-base adjustment may be required. Different dyes have different requirements for pH, and proper adjustment can change the dyeing effect and color stability.
5. Color fixation treatment: After dyeing is completed, color fixation treatment is performed to ensure the durability of the dye. Color fixation treatment can include heat treatment, cold treatment, pickling and other steps, depending on the requirements of the dye and fabric.
Please note that before undertaking any dyeing treatment it is important to follow the dye and fabric manufacturer’s instructions and test dye on a small piece of fabric to learn best effect. For more complex dyeing needs, it is recommended to consult and seek help from a professional dyeing technician.
