An extender pigment in oil paint. We've given PW18 (chalk) its own entry. According to artiscreation this is natural calcium carbonate with magnesium carbonate.
PW18:1 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com
Information about PW18:1 from Bruce MacEvoy, Handprint Guide to Watercolors
Rossol, Monona. The Artist's Complete Health and Safety Guide. New York, NY : Allworth Press, 2001. The book is rather dated, updated information is available from her website.
Lower Concern
Treat all pigments and paints with studio safety protocols.
Natural calcium carbonate with magnesium carbonate
DISCLAIMER: Please note that we are not experts in health and safety and we are not toxicologists, please consult the proper experts. We are not liable for any issues that may arise from the use of our website or its contents. The information contained in this site is provided without warranty or guarantee of any kind. We do not necessarily endorse any other website that are linked from our site. For any important pigment specs, please reference the manufacturer details. If you discover errors or omissions, please reach out through our contact form. Thank you.
