“Peel-off” style grease pencils that make water-removable marks on a variety of surfaces including glass, metal, & plastic. Commonly used in medical fields for making easily-erasable marks on skin. No sharpening required, simply pull the string at the tip to remove the paper wrapping & expose more of the pencil. Mitsubishi Rainbow Hydromarker 7610 - Dermatograph Pencils 3 Colors
