Clay based and much easier to erase. Other chalks that are not clay based will leave a grease on cottons and other fabrics. Also works on glass and vinyl that where chalks don’t work. Due to the shape of this chalk a sharp marking edge is maintained.
Box contains: 8 white chalks, 2 yellow chalks, 1 red chalk and 1 blue chalk.
| Osborne No. | Weight ea. (lbs.) |
| 88 | 12 |
