Zig Posterman Markers
Zig Posterman markers are the world's leading markers for sign writing on chalkboards, whiteboards and windows.
The ink is a safe, water-based pigment that is highly opaque and light-fast. It is xylene-free, odorless and waterproof when dry. Stays on glass, chalkboards, and whiteboards until you want to take it off with cleaning solution.
Also suitable for marking paper, plastic, mirrors, wood and stone. Great on posterboard.
You won't be dissatisfied with these high quality markers.Still available in the United States.