Review on 🖍️ AMACO Non-Toxic Underglaze Decorating Crayon Set - Assorted Colors, Set of 8 by Leah Gomez

I didn't find anything in the product description that indicated what temperature they would withstand. I did a test with a 10 cone and the brown, blue and black were fine. The green didn't get as bright anymore and the yellow washed off completely. The purple color turned light blue, possibly due to the clear glaze I applied above. I have another sample for the 06 cone firing. I assume all the colors will hold at a lower temperature and look fine. Easy to use, just paint on the cookie dough pieces. Water can be added before or after with a brush, finger, etc. Lots of options and they're fun.