How to choose the dye compatibility reasonably?

When hot melt dyeing polyester-cotton blended fabrics, color-blocking dyes must also have the same properties as monochromatic dyes. The melting temperature and time should be adapted to the fixing properties of the dye to ensure the highest color yield. Each monochromatic dye has a specific hot-melt fixation curve, which can be used as the basis for the preliminary selection of color-blocking dyes. High temperature type disperse dyes usually cannot be matched with low temperature type, and the two required hot melt temperatures are different. Medium-temperature dyes can not only color-match 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 color and light are unstable and the color reproducibility of the product is not good.

It is generally believed that the shape of the hot-melt fixation curve of the dyes is the same or similar, and when two dyes with the same number of monochromatic diffusion layers on the polyester film are dyed together, the color light in each diffusion layer does not change, which means that the two dyes are dyed together. The compatibility of dyes with each other is good; on the contrary, the shape of the hot-melt fixation curve of the dye is different (for example, one curve increases with the increase of temperature, and the other curve decreases with the increase of temperature), and the monochromatic diffusion layer on the polyester film When two dyes with different numbers are dyed together, the color light in the diffusion layer is different, so it is not suitable for color matching with each other, but the same hue is not limited by this. Take a chestnut: the shape of the hot-melt fixation curve of disperse dark blue HGL and disperse red 3B or disperse yellow RGFL is completely different, and the number of diffusion layers on the polyester film is also quite different, so they cannot be colored with each other. The disperse red M-BL and disperse red 3B have similar hues, although the hot-melt properties of the two are inconsistent, they can still be used for color matching.