Unavailable Pigments
2016-05-23
One of the most interesting bits of trivia I've learned while picking up painting is that certain pigments are unavailable today or rapidly disappearing. Some of these are: the original Carmine (Cochineal), formed from crushed bugs. This was not lightfast and thus discontinued. the original Emerald Green a.k.a. Paris Green. This was a compound of arsenic and copper; it was poisonous after being painted and the fumes reportedly killed some people. Ultramarine Green. This stopped being manufactured in 1960. Quinacridone Gold (two shades of it). Again, stopped being manufactured; this one around 2004. Naples Yellow (a lead compound) - somewhat toxic.
Genuine Lead White (a.k.a. Cremnitz or Flake White) is bobbling along on this area: it's a health risk, but not a significant one unless you have small children. The Cadmium family (reds through yellows) is under attack in the EU. It is largely safe unless you ingest the dust... then it's a big problem. Fortunately, that's rare. Unfortunately, Lead White and Cadmium have paint properties unavailable in their less toxic cousins, so if these get A nifty business idea for a chemist would be to to try to haul out lists of the pigments from different times and determine which ones would be useful today with modern chemical knowledge, then produce & sell the pigments at a suitably boutique price. Specific ones from the above list that would retain significant interest would be Ultramarine Green and the Quinacridones, since they are non-toxic and colorfast.
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