Do they fade like other semis or are they stronger? Can you use them to mix a color to make it darker or bad idea? I've never tried them so I'm curious. Thanks!
They are strongly pigmented, but fade like any other dye. They can be used for mixing but it is important to know what the underlying pigments are. Very few blacks dilute to grey, they are usually blue or green based, some are warmer, more brown.
Ok awesome. I have been eyeing some bottles but they just don't look dark enough...so I'm thinking of just picking up some black or brown to add in a drop. That's great to know! Thank you!