Quote Originally Posted by SamanthaM View Post
"solid coloring matter" refers to pigments IE pigmentation.
Or - the stuff used to make all the pretty colors.

If nail polish didn't have any "solid coloring matter" it would be clear.
There are a lot of liquid dyes, held in place not because they are solid but because the containing mixture solidifies.

For example, the colorant in Estée Lauder Pure Color Instant Finish Quick-Dry Topcoat is D&C Violet 2, which is minimum 99.5% water soluable -- a pigment, but not "solid coloring matter".