color-changing marker/eraser-pen, single - 6 pieces
For use with Magic Pens 9+1 (Art-No. 72001) and Felt-tip Pens 9+1 (art-No. 72002), The color-changing marker can be used as secret inks, which only become visible after being painted over with the magic markers. Feature water-based inks with a faint odor. The dry-out rate is approx 5 % per month. Free from formaldehyde and other harmful substances. The pH is ca. 6. All ingredients comply with the requirements of Euro Norm EN71, Part 3. The specially designed tip cannot slip inside the pen or bend under pressure.
The water-based inks contain glycerine, liquid vaseline, and nontoxic color pigments. Preservatives: potassium sorbate E202, benzoic acid E210. Euro Norm EN 71/9, American Norm ASTM D 4236.