I use the Fons and Porter marker that has interchangable leads. The color comes out with a spritz of water. You can make your marks as light or as dark as you need. I think there are now 4 or 5 colors. Black, white, green, yellow and pink. They are great, but I am anxious to find he frixion ones at Staples. I wonder who else carries them, Staples is far away for me, unless I order online