When we got our order of Frixion pens, we decided to test them...

We wrote on fabric and then ironed it off -- yep, that worked!!
Then we put that "no longer marked" fabric into the freezer -- and the marks returned!!
So... we LIKE them!! But we also recognize that we need to test test test before we use them on a project -- because you just never know when what you think is going to happen, won't.... has that ever happened to you?
Let's chat about your worst "I didn't test it first" mistake....
and really... it never OCCURRED to me to use them as disappearing ink!! But when I go into my next life as an undercover quilter, I'm going to keep this in mind!