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PICList Thread
'[EE]: Old solder paste'
2001\01\22@122726 by rottosen

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I have a syringe of old dried out solder paste. Is there a way to
reconstitute it?

Maybe I could drip a solvent into it, but--  What solvent do I use and
how do I know when I have added enough solvent?

-- Rich

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2001\01\22@133422 by steve

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> I have a syringe of old dried out solder paste. Is there a way to
> reconstitute it?
> Maybe I could drip a solvent into it, but--  What solvent do I use and
> how do I know when I have added enough solvent?

We used to do this many years ago. I remember that the bottle of
stuff we used to thin the paste with was labelled "Pine Oil". What
that is or where you get it from, I have no idea.

We mixed it to a consistency that made it easy to apply with a
length of wire for soldering QFP packages with an iron. I wouldn't
try dispensing and/or reflowing reconstituted paste. A small
variation in viscosity has a large effect in those processes. I guess
it depends how desperate you are to save $10.

Steve.

======================================================
Steve Baldwin                Electronic Product Design
TLA Microsystems Ltd         Microcontroller Specialists
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2001\01\23@175701 by Peter L. Peres

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Pine oil is pine oil. Ask a pharmaceutics/cosmetics/aromatic oil supplier.

Peter

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