Answer to Ken Roberts’ (new member
In the late 60s I met an enamelist working with Sydney Nolan on a
large commission for a London bank.
He had a technique where he covered the surface of preformed copper
sheets with clear enamel powder. Then he worked on the reverse side
of the sheet with a large propane torch. By the amount of heat he
used and the time of exposure he got a variety of subtle colours
caused by the copper oxydation.
I cant remember all the details, he also had a small intense flame
I think he mixed gum tragacanthe or gum aribic with the clear enamel
powder and painted it on in a thin layer, on to very clean copper
sheet, letting it dry before heating from the back. Use a mirror to
see what you are doing.
I dont know if he counter-enameled the back and he could sieve on
more enamel powder if necessary and re heat. Have fun. Experiment,
David Cruickshank (Australia)