Chemical texturiser
A milder relaxer left on briefly to loosen tight curls rather than straighten them.
Also: texturizer
A chemical texturiser uses the same kind of chemistry as a relaxer but is left on the hair for a shorter time, so it loosens the curl pattern without fully straightening it. It is often used on short coily hair to make waves and curls easier to brush and define. Like a relaxer, the change is permanent in the treated hair, and new growth comes in with the natural pattern. It is not the same as texturising with scissors.