I am very interested in your post Re: 18k finish. Was this not
in response to a query on cast pieces? My question is whether
this process is also applicable to fabricated work? The light
red colour require after applying the methylated spirits & boric
acid is perhaps too hot?
I have been searching for some time for a method a bringing up
the fine gold to the surface of 18k gold. I’ve tried depletion
gilding through repeated heating,pickling (Sparex), brass
brushing but with little success. I’ve also read the article by
Charles Lewton Brain which contains various recipes which all
appear rather dangerous and or time consuming. I believe that
in Germany there is a product which is widely used for this
purpose. It is a powder which is placed in a crucible then
heated, becomes liquid. The piece is immersed in it and then
washed in water. I have no idea what this powder contains but
sounds similar to what you do - although there are no acids
involved in the latter.
I would be absolutely delighted to find out more about this. If
you have any more I would be most grateful.
from West Australia