Originally Posted by Bluphrog
Clover has a white marking pen that works really well. When you first draw the line, it looks like nothing is there, but let it sit for a minute or two, and the marking appears. It is water soluble.
I use it on all my dark fabrics when appliqueing.
Yup, I have this and it works really well. I did think it wasn't working when I first marked with it and I set the square aside grumbling, then I looked over again and there were the markings!