Do you iron away the marks of frixion pens? or is it safer to blow dry the marks away? Are these pens expensive? I will give them a try.
Our quilt guild is doing a fabric swap using scrappy half square triangles. I made pinwheel blocks and each section of the pinwheel is a different fabric. I will trace a circle template over the scrappy pinwheel block to cut out a circle. The challenge is to find a marking pen that works on 8 different fabrics. ha!