Quote Originally Posted by lxdude View Post
I wonder what actually creates that bloom- oxygen, atmospheric contaminants of some type?
I've always seen it referred to as oxidation.
There were many attempts to produce said bloom under controlled conditions, none of which was very successful. Perhaps it just takes place so slowly that none of the processes were commercially valuable. The lens I referred to has been in my possession since the late 1980s, and it was well bloomed when it came to me.