You can always try searching the William and Mary Libraries catalog and then narrow the Material Type to books, book chapters, or reference entries (this video is a refresher on searching the catalog; some of the details are different but the process remains the same). However, some of the specific background resources below may also be useful.
Artists' Pigments by Free online versions of vols. 1-3 of Artist's Pigments are available from the National Gallery of Art:
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