Hello Peter, Thanks for such a good explanation of Prip's flux
and how each component works. I have one more question - which I
could probably answer by experimentation, but I'm feeling lazy.
Yeah, that's lazy, all right (grin). But i'll forgive you, this
I've got lots of precipitant, so I need to add water. Is it
necessary to reheat as the water is added? I vaguely remember
something from chem lab about heat being necessary to make a
saturated solution of the chemicals.
heating it will dissolve the componants faster, and more will
dissolve in hot water than in cold. If you dissolve the maximum
amount in hot water, then upon cooling, some will precipitate out
again. what's left after that happens is a fully saturated solution.
But then you've got the same problem all over again. Do it the simple
way. Add some water, shake well, and go do something else for a
while. if, when you return, there's still undissolved salts, add
some more water.
The big problem with these questions such as you, and others, have
asked isn't that they're not significant, it's that you're turning a
simple process, a chemical molehill, into this bid deal. It's not
the mountain of technical questions people seem to be making of it.
Just add enough water to dissolve the stuff. You don't need it
saturated, or any specific concentration. Just have at least most of
the chemical stay dissolved. You can mix it hot, cold, with
distilled water, tap water, or Evian water if you like. spray it
with my favorite mouth atomizers, or any other sprayer you like, or
just brush it on if you like, though that's harder for anything but
small items. But Geez. Prips flux is just not that complex or
critical. Almost anything works. I mean, for example, in the
formula, we say sodium phosphate. that can be trisodium phosphate,
disodium phosphate, or monosodium phosphate. How many formulas do
you know there it isn't even important exactly which of several
closely related compounds you use? Granulation is somewhat the same
way. Almost any copper salt, with almost any glue or gum, will work,
or just plate the copper on (which does work a little differently).
Be brave, people. Instead of killing yourselves with questions,
"just do it". Experiment a bit. It won't kill ya, and you might
learn more than from asking questions here. (grinning widely,
now...) And never forget that one definition of an amateur is the
guy who gets to be very good at doing something his way, because he
didn't know the experts had said you can't do it that way...
The only problem with making it more dilute is that you might have
to spray a bit more to get full coverage. This isn't a problem, and
for some situations, it's an advantage. Some school shops use the
recipe amounts, or thereabouts, that I use to make a quart/liter of
the flux, only they mix with a full gallon of water, to make it a bit
more dilute, since students sometimes tend to not only use more than
they need, but the overspray gets everywhere too. Mixed this way is
more economical for the schools, and the student projects come out