Each die comes from the manufacturer un-inked. Inking: If you would like to ink your dice yourself, an ultra-fine point permanent marker (black, blue or metallic) works well, as do paint pens (white). To ink a die, simply put the tip of the pen into the groove of the digit and trace. If the tip slips out of the groove, immediately rub the unwanted ink off with your thumb or an old rag. Preceision Edge: All GameScience dice are precision tested and razor-edged with sharp points because they have not been tumbled or sanded. To smooth down the spot on your die that is rough from being broken from the sprue, simply use hobby/automotive sandpaper. These sharp-edged dice are better than the egg-shaped round-edged import dice because they will roll accurately.