The Harvard collection is non-existent pigments

Harvard has one of the largest collections of pigments in the world, with more than 2,500 samples of different colors that are no longer produced for some reason-that is, because of their danger, but more often-because of the introduction of new technologies. Petrochemicals are taking over the world. For example, there is a very beautiful yellow made from cow urine that feeds only on mango leaves. Can you imagine? In tubes it was called "Ochre-mango". But that was before 1932. Now there are no such tubes. Well, they created this great repository of color for restorers. Sometimes it is simply impossible to restore the desired color with the help of chemical pigments and restorers first produce the same pigment according to old technologies. In General, it is very cool. If you sign up, you will be allowed. Go when you're there.Absolutely incredible place