How to choose the compatibility of dyes reasonably?

When polyester-cotton blended fabrics are dyed in hot melt, the color matching dyes must also have the same properties as the monochromatic dyes. The melting temperature and time should be compatible with the fixing characteristics of the dye to ensure the highest color yield. Each single color dye has a specific hot-melt fixation curve, which can be used as the basis for the preliminary selection of color matching dyes. High-temperature type disperse dyes usually cannot match colors with low-temperature type, because they require different melting temperatures. Moderate temperature dyes can not only match colors with high temperature dyes, but also have compatibility with low temperature dyes. Reasonable color matching must consider the consistency between the properties of dyes and the color fastness. The result of arbitrary color matching is that the shade is unstable and the color reproducibility of the product is not good.

It is generally believed that the shape of the hot-melt fixing curve of the dyes is the same or similar, and the number of monochromatic diffusion layers on the polyester film is also the same. When two dyes are dyed together, the color light in each diffusion layer remains unchanged, indicating that the two The dyes have good compatibility with each other; on the contrary, the shape of the hot-melt fixation curve of the dyes is different (for example, one curve rises with increasing temperature, and the other curve decreases with increasing temperature), the monochromatic diffusion layer on the polyester film When two dyes with different numbers are dyed together, the shades in the diffusion layer are different, so it is not suitable for each other to match colors, but the same hue is not subject to this restriction. Take a chestnut: Disperse dark blue HGL and disperse red 3B or disperse yellow RGFL have completely different hot-melt fixation curves, and the number of diffusion layers on the polyester film is quite different, and they cannot match colors. Since Disperse Red M-BL and Disperse Red 3B have similar hues, they can still be used in color matching even though their hot-melt properties are inconsistent.