After being tortured by seeing all the "diy plates" with sharpies, I feel honor bound to post that you really should be using a Pebeo Porcelaine 150 pen. Seriously, this is what we use and sell at work-- don't use sharpies people!
How to print a saying and trace it onto your mug and then color it in.
Great design on mugs made with #Porcelaine150 markers by @Shauna Mailloux @ Beautiful Matters
Alisa Burke - porcelain pen decorating
design ideas for my new porcelain paint pen (thanks @Emerson McAfee !)
De jolies assiettes à realiser avec les feutres #Porcelaine150 de #Pébéo
DIY mug w/sharpie paint pen. Use pattern idea for edges of white plates.
Designa dina egna muggar – Design your own mugs
DIY hand-painted ceramic tealight holders by funnelcloud rachel, via Flickr …