marci Boskie's Mama =^..^= on wed 8 feb 06
There was a question from the end of January from Dan asking about firing
gold leaf...
He said :"I've thought about trying to fire leaf onto a piece. You would
need a fairly low-firing glaze, since pure gold melts at 1950, pure silver
at 1762, and sterling silver (which has copper in it) at 1640.Various gold
alloys melt at lower temperatures. It might be fun to try, and if anyone
does, please post the results."
It is possible to fire gold leaf as an overglaze technique so it
shouldnt matter what kind of glaze you use since this technique would be
an extra fire after the piece has already been glaze fired....Undercoat the
area that you want to leaf with china paint... ( I use an oil based
medium but water based will work just fine....) and fire it to cone
015... This will provide an undercoat and the flux you need to fuse
the leaf to the glaze... Then , using either the leaf sizing that you
would traditionally use to adhere the leaf to a piece or a drying china
painting medium like a grounding oil or thinned fat oil ( you need
something that will get tacky ) , apply that over the fired china paint.
Wait until it is tacky and nearly dry , then apply the gold
leaf..The easiest way to do this is to lay waxed paper over the leaf,
and then lay the waxpaper/leaf ( leaf side down :OD ) on the piece
,carefully pushing the leaf onto the tacky surface with the side of a
soft brush or pouncing it gently with a stippler to make sure it is stuck
very well... Fire anywhere from an 018 to 015... It shouldnt require
burnishing...
Marci Blattenberger Boskie's Mama =^..^=
http://www.marciblattenberger.com
Marci@ppio.com
Porcelain Painters International Online http://www.ppio.com
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Ivor and Olive Lewis on thu 9 feb 06
Dear marci ,
See if you can find a copy of Greg Daly's Book, "Glazes and Glazing =
Techniques"
Greg describes an "On Glaze" process for about 600=BA -700=BA C using a =
bismuth resinate pearl lustre to both bond and act as an overcoat for =
the precious metal. This will only work with Noble Metals which do not =
oxidise at these temperatures. He demonstrated this at his workshop in =
1991.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
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