Excuse me, how to adjust the disperse dyes to black?

It is not only related to dyes, dyeing time and temperature, but also some fibers are difficult to dye deeply. For example, very white fiber may be added with fluorescent whitening agent, and some recycled fiber components have changed, or may not be dyed deeply.

It can be dyed with three primary colors and mixed with two or more disperse blacks. For example, disperse black ECT usually has heavy blue light, red DRD and purer color mixing.

And even the pretreatment of fiber is necessary. Oils and some finishing agents (smoothing agents and antistatic agents) may have some influence on dyeing.