Thanks Donald....
So, in a way it's like paint...solvent evaporates and the solids settle
out.
I just wonder what chemical the "medium" is....and if more of the same
were added and mixed would that prolong its life even more? Now, that's
with evaporation....oxidation is quite another issue. Any thoughts on
that?
Charlie
On Tue, 5 Nov 2019 18:51:04 -0500 "Donald H Locker"
<dhlocker@...> writes:
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The medium carrying the solids changes viscosity as it ages and
evaporates and oxidises and/or reduces); the solder balls settle as
gravity exerts its ever-present force; the flux reacts with the
vehicle
and solder reducing the fluxing potency and the vehicle viscosity
and
solder wettability. There are probably other effects, but those are
the
big ones that I've read about.
Donald.
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On 2019-11-05 6:30 p.m., Charlie Hansen wrote:
"> Be aware that the rated shelf life is anywhere from 6 months to
a
year. It lasts longer if you keep it refrigerated, especially
after
breaking the seal."
Guys, there's something I always wanted to know about that shelf
life....what the heck causes the stuff to go bad?
Charlie
On Tue, 05 Nov 2019 14:51:58 -0700 "Dwayne Reid"
<dwayner@...>
writes:
Hi there.
We have been purchasing 63/37 solder paste from Chip Quik -
both
direct and via Digikey. It's available in both syringe and jar
form.
Be aware that the rated shelf life is anywhere from 6 months to
a
year. It lasts longer if you keep it refrigerated, especially
after
breaking the seal.
We normally purchase the Water Soluble flux version - we then
just
wash the boards under running hot water and blow dry with
compressed
air. This works especially well for the small prototype board
runs
that we do.
dwayne
At 10:39 AM 11/5/2019, Dave wrote:
I have plenty of regular solder, and plenty of flux, now I need
to
buy some solder paste for smd stuff. Any recommendations? I
would
like some in a jar and also a syringe just to have both. Is
no-clean
solder better? Also, I just want tin/lead solder if it is still
available.
Thanks,
Dave
