God manufactures tree sap.  Ancient mosquitoes used to like to chill out 
in it.  When the stuff is well aged we call it amber.  The processed 
version for soldering is called rosin flux.

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On Thu, 25 Jan 1996, Stephen C Joy wrote:

> Text item: 
> 
> Who manufactures this sap stuff? Does it help with solder balls?
> <snip>
>  Soldering with pine tree sap was developed by the Egyptians several thousand 
> years ago.
> <snip>
>