Metallic Chalk Markers Pens- 8 Colors | Dust Free, Water-Based, Non-Toxic | Wet Erase Chalk Ink Pens for Chalkboard Signs, Blackboards , Glass 1. Quality Professional: We use imported environmentally friendly ink and dry it in a few seconds after writing. Once dried it is not easy to apply, but can be easily wiped off with a clean, damp cloth.