A chemical substance that causes dyes to set is called?
http://en.wikipedia.org/wiki/Mordant
A chemical substance that causes dyes to set is called a mordant.
The chemical substance that causes dyes to set is called a mordant. A mordant is a material or chemical that helps in fixing or binding a dye to the fabric or any other material. It acts as a bridge between the dye and the material, enhancing the dye's color fastness and preventing it from washing out.
To find this answer, you can search for keywords like "chemical substance that helps dyes set" or "what is used to fix dyes to fabric." This will likely lead you to relevant sources such as articles, educational materials, or chemical databases that discuss mordants and their role in dyeing processes.