Synthetic dyes that use potassium bichromate to form a permanent bond between yarn and the dye. More widely used than vegetable dyes because they are colorfast.
A group of modern synthetic dyes that are composed of potassium dichromate. These dyes are colorfast.
Colorfast dyes that use potassium bichromate to bond the yarn to the dye.
a group of modern synthetic dyes that are used with a mordant of potassium bichromate. These dyes are fast and non-fugitive.