Write clear, legible marks on a variety of materials including porcelain, glass, metal and plastic with Peel-off China Markers. These versatile grease markers write smoothly on most porous and non-porous surfaces. Even better, there's no sharpening required: simply tear the string for more pigment. Each wax pencil has pigment that's both fade and water resistant for marks that can withstand abuse. Plus, cleanup is simple, erasing easily with a damp cloth.