We love this color so much that the ASTM rating of II just hurts to see. Certain brands in watercolor came closer to ASTM I in Bruce MacEvoy’s testing. If it's from a supplier where you can avoid those blue wool scale 6's that's one thing, but this beauty seems to have a definite risk of fading depending on the supplier. This color is a merry red that makes gorgeous tints. It has transparency to it.
