Due to the irreversible adsorption of cellulase on specific fabrics, it accelerates the re deposition of bright blue dyes onto cellulose fibers. Therefore, the presence of cellulase is the main reason for denim washing and dyeing. This research conclusion mainly considers the interaction between specific fibers and cellulase proteins: if there are many proteins bound by fibers, the degree of retrogradation is deep;

1、 Why is it required to use a small amount of cold water to mix the slurry first when using chemicals, and the temperature of the chemicals should not be too high?

The felting deformation of woolen sweaters during washing in the washing machine seriously affects their quality and wearability. However, wool sweaters that have undergone preshrunk finishing can enhance dimensional stability and improve felting deformation.

The main reason for light spots is uneven pre-treatment, poor hair effect in some parts, resulting in certain dye repellency, or containing dye repellent substances. During pre-treatment, there are calcium soap, magnesium soap, etc. on the cloth, uneven mercerization, uneven drying of semi-finished products, or solid stains such as undissolved elemental powder, soda ash, etc.

There are many water-soluble groups in the molecular structure of reactive dyes, resulting in poor wet fastness, and fixation treatment is often required after dyeing. There are many types of fixing agents, commonly used including metal salt fixing agents (such as copper salts), cationic fixing agents (such as fixing agent E), and reactive fixing agents (such as fixing agent Y).

The commonly used additives for repairing dyeing defects include reducing agents, oxidizing agents, surfactants with strong cleaning functions, and alkaline agents.