Dear Dr Dule
Dilution. The bottles of lime suphur we get from garden shops
here may be a different strength from the stuff you are able to
get, so you’ll need to (as you’ve done) play around with the
dilution. Yours may need no dilution! I use a ‘splosh’ of lime
suphur to a <holds fingers 2" apart> about 1/2 cup hot water.
I’ve never had to be more specific than this myself, but if you
want me to work it out, I will.
Temperature. The lime suphur solution is to be hot, but not near
boiling. The technique of room temperature solution and ‘warming
the metal under a stream of running water’ will have had little
effect on warming the solution to, say, 160F. Your 50/50
dilution should’ve worked. Must’ve been too cold.
Rinse. Like you, I use a rinse to ‘stop’ the action while I
check the colouring process. Have it at the same temperature as
the solution. Hot, but not boiling.
Try that out, and if required I’ll look at what dilutions the
garden people recommend for the treatment of fungus and lichen
and we’ll compare that to what’s on your bottle, so establishing
a solution-strength comparison.
B r i a n =A0 A d a m J e w e l l e r y E y e w e a r =A0
@Brian_Adam1 ph/fx +64 9 817 6816 NEW ZEALAND
http://www.adam.co.nz/exhibition/ Recent Work