| The chemicals formulated in this chalk are similar to those used in Hidden Glow Disappearing Chalk "Slo" Formula #999. The difference is that this product contains a special fluorescent compound which will remain in the fabric after the visible mark has disappeared. Consequently, a fluorescent mark will show up under "black light", even though the naked eye can observe no markings. Because the fluorescent markings will be available for use even after the disappearance of the visible markings, such problems as marking on lightweight fabrics and alterations can be overcome without any of the former staining problems. Brightness under black light Grade AA. Piece size 1-1/2" x 1-1/2" x 7/32" plain finish. Thirty-six pieces per box and 24 boxes per carton. |
