I Sew for Fun water soluble fabric marker. A fabric marking pen with blue ink that disappears in water. It also doesn’t bleed into the fabric as much as some other marking pens. We tested this pen and found that we like it much better than the ink that disappears on its own without water. We did note, however, that with some fabrics the ink will reappear if you merely spray the fabric with water. The ink permanently disappears when the fabric is laundered. This is a must-have for beginning sewists. And don’t forget to get a good pair of shears too!