Similarities and Differences between Printing and Dyeing
(1) Similarities: 1. The principles of dyeing and fixation using dyes are similar. 2. The physical and chemical properties of the chemical additives used are similar. 3. The same type of fiber can have the same color fastness if it is colored and printed with the same dye. (2) Differences: 1. No or a small amount of thickening paste is added to the coloring solution, while more thickening paste is added to the printing paste. 2. Coloring solution, the dye is easily soluble, no co-solvent is added. For printing paste, add more co-solvent. 3. When coloring, the dye penetrates and diffuses fully. When printing, dyes are not easy to diffuse and penetrate, and must be steamed or baked. 4. Coloring and printing may have special requirements for the same type of dye. 5. Coloring rarely uses two different types of dyes to match colors. Printing often uses different types of dyes. 6. Printed fabrics have very strict requirements on the weft and skew of semi-finished products. 7. Printing is better than coloring at covering defects in natural cotton fabrics. 8. Coloring and printing have different pre-processing requirements for semi-finished products. (such as whiteness, hair effect)
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