In addition to what Stefan said, I'd say it's probably not worth it. If the reliability of the joints is compromised by attempts to "rejuvenate" dead paste, how much is lost and how much is gained? I just buy the minimum amount I think I'll need. If there is leftover (there usually is) I take it to the municipal hazardous waste disposal site where they know how to handle lead-laden materials correctly.
Donald.
--
*Plain Text* email -- it's an accessibility issue
() no proprietary attachments; no html mail
/\ <>
On 06-Nov-2019 18:30, Charlie Hansen wrote:
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:
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.
--
*Plain Text* email -- it's an accessibility issue
() no proprietary attachments; no html mail
/\ <>
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
[snip]
