--- dombaines <
dombaines@...> wrote:
> So what is in a simple tin salt mix...
The Metal Finishing Guidebook lists three formulations
for immersion deposits of tin onto copper, only one
formula is cyanide-free. Here is that formula:
Stannous chloride 3.8 g/L
Thiourea 49.5 g/L
Sulfuric acid 12 ml/L
Combine the compounds at a temperature of 80-120
degrees Fahrenheit.
The crystals in TINNIT and other similar products are
of a similar chemistry (But, in solid crystal form).
There is simply no other way to do it without using
cyanide salts.
Best regards
Marvin Dickens
Alpharetta, Georgia USA
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