French chalk
Revision as of 07:04, 24 July 2013 by (username removed)
Description
Common name for magnesium silicate (talc) prior to the 19th century. The name French talc is still occasionally used for a very soft talc which tailors use for marking fabrics. French chalk is also dusted between book leaves prior to gilding and is used as a sorbent for removing grease spots on paper and clothing.