Blackboard Pastel Chalk
Mercurius Blackboard Chalk is a soft, highly-pigmented pastel chalk used to create beautiful blackboard drawings. It has great coverage and blends easily. The square pieces are covered with paper to help keep fingers clean.
Available in single color boxes or sets of 12 or 16 assorted colors. The colors follow the Stockmar color range.
This chalk contains no unsafe pigments or fillers.