Welcome to veganartstuff. I am Ansho, and these are my vegan-friendly and cruelty-free criteria, which have to apply to the products and companies:
A product can be considered vegan, if the entire product itself does not contain animal ingredients, byproducts/ derivatives and none of those are used in the manufacturing process, e.g. the use of animal derived oils and fats in surfactants for the dispersion of pigments. The manufacturer does not test on animals or commissions other parties to do so, none of their parent and sister companies or any other partners test on animals or commission animal testing, none of their raw material suppliers and subsuppliers test on animals or commission animal testing, if there are other options. (According to the European Chemicals Agency, ECHA, animal testing has to be avoided if it is possible and has the goal to minimize animal testing for REACH. Lastly, there is no animal testing abroad for the manufacturer’s products to be sold abroad.) By “entire product”, all parts of the product are meant, e.g. the ink and its jar it is contained in, the body and nibs of a marker, a pencil’s wooden body as well as lacquer/ print on it.
I will keep contacting art supply companies to amass product information for this compendium and build it up more and more over time, so animal respecting art lovers will have an overview of suitable art supplies.