tinning
by ernie
(boston, ma)
When is it appropriate to use tinning before final assembly.
AnswerSome people tin every piece others don't tin at all. I'm from the "don't tin at all group". To me it's a waste of time and solder. The only things I tin are copper wire, vase caps for lampshades, brass tubes (not the rod) for hinges, rods for garden stakes, and anything else that's metal.
There are some instructors that teach tinning is necessary for strength (I don't teach that concept). If you cut your glass accurately and construct your projects so there is "wiggle room" between each piece, solder will run between each piece as you solder giving the piece as much strength as it needs.
What I mean by "wiggle room", is that the pieces are touching but not jammed together. If you put your hand on the pieces, before you solder, and wiggle the glass, each piece would just barely move. That's "wiggle room". You don't want or need a visible space between each piece. That would give you wide and inconsistant solder lines.