Quote Originally Posted by Photo Engineer View Post
Yes Sandy, some of the food dyes will mordant to the paper support. Sorry. The only other way to do this is use a pigment. You might consider the pigment used for colored carbon. Just use a tiny amount to make the coating visible though.

OTOH, can you coat on YUPO? I doubt if the dyes would mordant to that support.

I could probably coat on Yupo, but for printing I prefer all rag papers.

Guess this is one of those times when the solution is worse than the problem! Though I will give the pigment idea a try. Got plenty of that on hand.