I have a recently completed quilt that has been washed and dried, that I used frixion pens on quite extensively - blue, red and orange. It is sitting out in my car right now so will take a look at it when I get home and see what it looks like. My quilts are generally in the house, so I don't really care about that freezing thing. I love the frixion, but I am not making heirlooms, nor show quilts. Other than that, I use chalk pencils, lead pencil, most anything that I believe will wash out.