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

Well, after much research and discussion, I've found how these
machines really work. Apparently, the bottom roller is a steel(or
covered) roller that is partially submerged in a solder bath. What
prevents the solder from building up on the steel roller is the
addition of Solder Salts that help to coat a thin layer of solder on
the roller. Then the top roller is usually made of silicon rubber and
the more pressure placed between the two rollers, the thinner the
layer of solder on the pc board. Of course, the cost of this machine
should be minimal seeing as how the main cost of use is the salts and
the replenishment of solder. The ability to acquire cheap salts is
the daunting task; anyone have any ideas on that? I think that the
machine can be homebrewed and be cheaper then TiNNiT and lasts longer
as well.