Information on historical pigments, dyes, etc. can also be found in older articles and patents. Make sure to search SciFinder, which includes approximately 100,000 selected articles and patents from the early 1800s through 1907.
Google Books contains thousands of full-text chemistry handbooks published in the 19th and early 20th centuries. For best results, limit your search to full-text sources and search by name of the historical pigment or material. For example, "Prussian blue" or "isinglass" (fish glue). Adding words such as "preparation", "formula" or "receipt" (recipe) can help to narrow your search.