a black contour marker for glass and porcelain. The tip is mm thick and the color is very opaque. Let your decorated porcelain dry for 4 hours and then be cured in the kitchen oven at for 90 minutes, to be dishwasher safe.
Weekend DIY Project: Decorate a mug or cup -- Bake in the oven for 30 minutes at 350 degrees. Let it cool completely before using or washing it. When you wash the mug, hand-wash it gently instead of throwing it in the dishwasher.
DIY Craft Project: Sharpie Mug Tutorial - Custom heart handle mugs that require no artistic ability or transfers! If you can trace and make dots you can make these mugs! Learn the easy hack! Uses oil based Sharpie paint pens that are baked on.