Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@g...> wrote:
>
> Alan,
> 
> as i said it is mainly colophony resin (the same flux used in many
solder  
> wires) and alcohol.

A quick Google shows that Colophony resin is pine sap, or based on it.
Collected when they are harvesting turpentine from pine trees:
http://www.herbdatanz.com/offical_volatile_oils_bp.htm
http://www.polymetaal.nl/beguin/mapg/gums_and_resins.htm

I also see some indications that breathing it is not good for you long
term. I know, I know, that fits a lot of things.
<http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1016290&dopt=Abstract>

So it looks like it should be easy to find now that you know. Used in
woodworking so look for specialty wood stores and in art so check art
stores. Apparently rosin for violin bows, although I'd expect this to
be one of the most expensive sources.

Steve Greenfield