Edding 4200/6999 Set of 6 Color Combination Porcelain Brush Pencils "Warm": Large surfaces and fine details on porcelain, glazed ceramics, and ovenproof glass can be designed with a fiber-tip pen that is dishwasher safe and doesn't drip or run. The stroke width of the flexible brush tip is 1-4 mm. The water-based pigment ink dries quickly, is particulate matter, and can be adjusted prior to baking.