What effect can be achieved by using a deepening agent？

Deepening agents can be roughly divided into two categories: use during dyeing and use after dyeing. The principle of the former deepening is actually to modify the surface of the fiber, thereby changing or improving the surface properties of the fiber, increasing the affinity of the fiber to coatings and dyes, so that the coloring material is better absorbed and fixed; in addition, it can also be changed by changing the dye Solubility in solution, or slightly changing the dye structure to improve dyeing performance; the latter's deepening principle is to cover a layer of low refractive index material on the fiber surface, which can change the fiber's absorption, reflection and scattering of light Degree, so as to obtain a better apparent dark effect. This kind of darkening agent has very good practical value for dark products where the dyeing depth of the finished product after dyeing does not meet the requirements, or the amount of dye is large.

By padding with a low refractive index, a dense uneven film is formed on the surface of the fabric to roughen the surface of the fiber to achieve the effect of etching. The uneven film can change the reflection direction of light, so that the incident light is absorbed by multiple refraction on the surface of the fabric, thereby reducing the reflected light and achieving the effect of deepening.

After darkening, the fabric sample can obtain a significant color darkening effect, the color change is small, and the red light is significantly eliminated at the same time. It is antistatic and hydrophilic, and the fabric feel will not change after treatment.

When using a deepening agent, the rolling groove and pressure roller should be cleaned, and the pressure at both ends of the pressure roller should be even and consistent, to keep the cloth surface clean and flat, to avoid wrinkles, mix the deepening agent emulsion, generally 30~50g/ L, adjust the dosage according to the depth.