I am curious if anyone has experimented or has knowledge of certain pearl
color treatment techniques. I plan to play around with some of the
treatments below but would appreciate any insight into any processing
techniques including proper dilutions, wavelengths, etc.
Freshwater pearl bleaching: Most FWP, as they are harvested, are
brownish orange. They are then soaked in a bleach bath under intense
flouresent lights for a period of time.
Freshwater pearl irradiation: Apparently, irradiating pearls
essentially burns the inner nacreous layers of a pearl to form a brownish
color. This appears as a grey to peacock color on the surface.
Pearl dyeing: I have read that pearls are dyed with a silver salt
(silver nitrate, silver chloride, etc) and silver is deposited on the
surface of the pearl creating a gray to black color.
If anyone is familiar with any of these processes, I would appreciate any
specific you have–or even methods that don’t work.