These twin-tipped markers are ideal for pastel chalk effect writing. When working on dark paper, watch how the ink magically appears right in front of your eyes! Why not try blending these markers with our ZIG Memory System Calligraphy range? You can create some wonderful effects. These are a great way to jazz up all your papercrafting projects. A fine tip (0.5mm) and bullet tip (1.2mm) for all types of creative lettering and doodles. A water-based pigment ink that is photo safe, acid free, lightfast, odorless and xylene free.