Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Six month ago people were complaining that MG chemicals Liquid tin is
too expensive. This mixture is more expensive, harder to use and useless
for making boards from time to time.

I really don't advise people to buy those chemicals, one won't like
results one month after mix. Mixing it every time one do pcb's is
boring, and think about disposal the used stuff.
But at least use the tin sulphate, sulphuric acid and thiourea mix. Less
hazard and easier to get. The tin salts can be home made. There are
metal cleaners with thiourea but too expensive.

I have a bunch of chemicals including those, my advise? Buy Mg Chemicals
liquid tin. From what i learn is the best, good price, easy to store and
long lasting. This group is mostly North American people should be easy
to get there. I really wish to be able to buy it anywhere in Europe. (I
know, they have a representative in France).

There are from MegaUK and Ormecon equivalent products but based on
methane suphonic acid, by what i know should be as long lasting as
fluoroboric mix or better but the only number given is 6 months life.
Ormecon is now part of Enthone, which is well represented everywhere.
But since i have thiourea, one day i will asking around at tin plating
facilities if they sell me for cheap, some of their suphonic or
fluoboric tin electroplating solution, mix thiourea in it, and hope it
last for a few years.