Heat and Bond is a permanent adhesive...I don't think it will come out of the fabric unless it is labeled as a temporary bond. I don't understand why you were using it for marking? Did you maybe get it mixed up with freezer paper as a temporary marking aide? Ironing on freezer paper holds it in place, shiny side down, but it easily peels off the fabric. Blue masking (painters tape) works better than the cream colored, less residue left on the fabric.