This Gina K. Designs Amalgam Ink works perfectly with Copic Markers, Watercolors, and Colored Pencils with Gamsol. No bleeding and dark, vibrant color! Allow to dry for a minute or two before use or heat set for faster drying time. Coordinates with Gina K. card stock beautifully. Obsidian is a very dark black ink and may stain your stamps but this will not affect the quality of the stamped image.