Disappearing chalk is used for marking fabrics that cannot absorb a wax mark and that would not permit brushing out clay-based chalk marks. This formula oxidizes when exposed to air in 165 hours or immediately when placed in a steam press.

Packed 36 pc. per box.
Each square measures 45mm x 38mm x 5mm (1 3/4" x 1 1/2" x 3/16").