And whatever you do - DON'T do what I did. Total novice move: I had to mark a high contrast quilt. So I marked the dark spots with pounce and the light spots with blue wash-away pen. When I was done I realized the folly of my plan. The pen sets with heat and the pounce needs to be ironed off. I ended up spritzing the blue areas and then ironing off the chalk. Never again! I was so worried about messing up.