Hi grma33,
I have made 2 one with dinosaurs and another with Pixies,fairies. I only used crayola crayons. Don't really know what you are talking about. I do know you are not supose to wash or dry in heat. I really don't know how long they will last, I made them for my 7 and 4 yr. old GrtGkids. I have caution the moms not to wash in hot water and not to dry in hot dryer. So I will know one day how they keep their color. Right now Both quilts are very bright.
I am so full from Christmas food and cheer, I got on here for a min. to relax. I know this didn't help you. Sorry.
Bill'sBonBon