karenkstudio Posted May 15, 2017 Report Share Posted May 15, 2017 what kind of a sealer can be used to slow oxidation of copper raku? Beads I use for drop earrings have turned green. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted May 15, 2017 Report Share Posted May 15, 2017 UV Krylon resistant acrylic clear coat. also don't use mote than 5% copper in a glaze. It is highly unstable above 5% Marcia Link to comment Share on other sites More sharing options...
Marcia Selsor Posted May 16, 2017 Report Share Posted May 16, 2017 I edited the above post. (too early) I use the Krylon acrylic non-yellowing clear coat. I did a 9 year text on a piece outside in Montana. The copper glaze turned green where it was not treated and remained iridescent where it was. i used a liquid clear coat thinned and also the spray on thin...not together, either or.. Marcia Link to comment Share on other sites More sharing options...
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