Hi All; Some of you have mentioned using “cool-jewel” (sp?) and other
gelatinous products, as well as wet cotton, etc., to prevent a stone
from exposure to excessive heat when soldering. I would like to
suggest a product I was introduced to many years (decades, really)
ago that I think is much easier to use and more effective. It’s
called “Feldina” and the only supplier I’ve seen who carries it is
Geisswien (sp?). It’s a gray powder, looks like asbestos but it
isn’t. Add water to achieve the consistency you want. It’s easy to
submerge an article in, holds water well, and cleans up easily and
it’s fairly cheap.
David L. Huffman
David L. Huffman Studios, Inc.