Sam or Mary Yancy on tue 24 jan 06
I got some good info on gold/silver/bronze leaf applicattion (thanks to all of you who responded) and I have done these applications many times on motorcycles and custom cars (i was a custom painter/graphic artist for many years) and then coated the leaf with clear laquer or polyurthane for protection. .
But as to clay: What my question was is: Has any potter applied gold/silver/bronze leaf to pottery, then coated it with a clear glaze and THEN FIRED IT TO MATURITY??? What were the results? I would rather get this info than make a bunch of stuff and fire it and find that it doesn't work. Thanks a bunch, Sam in Daly City
jonathan byler on tue 24 jan 06
I have seen people apply silver leaf to glass while it was hot, and
somehow keep it from burning up. I would suspect there might be some
problem when the organic material in the sizing would burn up causing
the leaf to fall off possibly and causing the glaze to adhere porly or
pit. Why not try a bit on a test tile? you might need to find a way
to apply it without the sizing, say thin wet coat of glaze, gold/silver
leaf, and then a coat of glaze to cover it. might need to spray the
second coat so as not to disturb the leaf. you need to fire less than
1730 F for silver, and for 24k gold under 1900F or so. check up and
see what the melting temperatures are for these metals, so you don't
fire too high. most pots I have seen with gold lusters on them were
fired at relatively low temps so as not to burn out the metal. I
would shy away from using imitation gold or silver leaf. imitation
gold is some sort of bronze type material which would oxidize nastily,
and imitation silver is often aluminium, which melts around 1200F.
Like I said, try a test tile and see what happens with the standard
leaf size (glue) and try apply ing without it too. let us know what
happens.
good luck!
jon
jon byler
3-D Building Technician
Art Department
Auburn University
Auburn, AL 36849
(334) 844-5279
On Jan 24, 2006, at 5:03 PM, Sam or Mary Yancy wrote:
> I got some good info on gold/silver/bronze leaf applicattion (thanks
> to all of you who responded) and I have done these applications many
> times on motorcycles and custom cars (i was a custom painter/graphic
> artist for many years) and then coated the leaf with clear laquer or
> polyurthane for protection. .
>
> But as to clay: What my question was is: Has any potter applied
> gold/silver/bronze leaf to pottery, then coated it with a clear glaze
> and THEN FIRED IT TO MATURITY??? What were the results? I would rather
> get this info than make a bunch of stuff and fire it and find that it
> doesn't work. Thanks a bunch, Sam in Daly City
>
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Ivor and Olive Lewis on thu 26 jan 06
Dear Friends,
People who choose to use Karat Gold Leaf or Copper or Bronze or Silver =
coloured Karat Gold leaf should view this as a post glazing process. If =
it is done cold then the leaf is secured, or was, with Gold Size. Leaf =
is available in two qualities, Sheet or Flake.
As a post firing firing process the glaze is primed with a Bismuth Resin =
Flux (Lustre) or other balsam adhesive before the leaf is attached and =
painted with Bismuth resin lustre. Fire as for "Fused Lustres" in a =
neutral but not reducing atmosphere at around Cone 022 or 650=BA C or =
slightly higher. This may involve some trials to get the best results.
Heating above 1000 =BA will melt the gold leaf and it will disappear.
Have fun and experiment.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
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