Tips and Tricks for Sharpie Marker Mugs. A must read if you plan to add a sharpie design to a mug! Lots of great info. Sharpie marker mugs - dollar store mugs with sharpie markers. bake 350 for 30 mins to seal
Paint pen or oil based sharpie,allow them to dry for at least 24 hours. Once 24 hours has passed place them in a cold oven (this is important! you want them to heat up with the oven). Turn the oven to 400 degrees and set a timer for 40 minutes.