As I mentioned above
https://www.leevalley.com/en-ca/shop/tools/supplies/finishing/wood-stains/20082-intense-aniline-mixing-colors
They can be mixed with alcohol but better with water. I had a commercial photographer client who required 2'x4' sheets of BB stained for backdrops. All sorts of...
Yup. In the print shop, kitty litter duty went to the lowest on the totem pole. (The shop backed onto a hydro greenbelt with lots of meese. Paper makes great nesting material.)