BigWallop wrote:
"Adrian" wrote in message
...
John Nagelson gurgled happily, sounding much
like they were saying:

The paint you have described
[i.e. presumably the slamfärg I asked about]
has copper added to the solvent / pigment mixture, so sounds very much
like the new Red Lead Paint we have in the UK.
Very interesting. Thanks for this. How does this differ from "red oxide"
paint?
Red Lead = Red Oxide - it used to be made with lead oxide.
http://www.screwfix.com/prods/13032

I don't believe it's the same thing at all as Falu rodfarg, being
primarily intended as a metal primer.


It's now made with copper or zinc oxide additives (so as not to trouble the
tree huggers), and was also widely used, when it was actually lead, as a
protective coating for almost all surfaces that faced the weather. In fact,
the Forth Rail Bridge is being painted with the stuff as we speak, and
without the use of any top coatings. That's why the bridge has always been
red oxide in colour. So it has not just been used as a metal primer.

May I quote from an earlier post in this thread, Adrian.

"It's a byproduct of the ginormous copper mine at Falun, in Dalarna"

Note the word "copper" in this sentence. The bi-product referred to, is
copper oxide, which was found to give very good protection when it was
painted on surfaces that faced the weather. Who'd have thought it. Add it
to a solvent and a pigment and paint it on. Surface has now got quite a
good protective coating to guard it from the harsh elements outside.

-)


strictly thats cuprous oxide. Not copper oxide. Or something. Copper
oxide is black.
\I think there is lichen resistance on metal oxide loaded paints as well.