Fellow #watercolor and #pigment nerds, this guy Phil (a chemist and pigment lover) tried, a couple years ago, to manufacture his own batch of the late great PO49 - with some success! If there were a watercolor nerd dating app (and there should be), imagine Phil's DMs.
This was really fun to read, I wish I had a giant chemistry set at home (every living thing I inhabit this house with would like to register their emphatic disagreement with that sentiment, but whatever).
https://www.wetcanvas.com/forums/topic/bringing-back-quinacridone-gold-po49/