A word of caution -- I used a light blue chalk pencil that was supposed to wash out and I still saw faint lines occasionally on my light pink quilt top -- I rewashed after treating the lines with stain remover. Also, I've never used the markers that disappear with heat but I have read online that sometimes the lines can faintly return. Whatever you use, the lightest line you can use and still see to quilt on the better. If you are too heavy with chalk or pencil it may not all wash out. I've heard ladies lament about this at my local quilt shop at classes, too. They usually felt they just pressed too hard with the chalk or pencil.