karenkstudio Posted August 19, 2020 Report Share Posted August 19, 2020 Any thoughts on why this happened. Just finished a batch of wood fired Raku pieces with unique results. On some pieces I leave bare clay areas so it turns black in the reduction, however this time the bare areas have a silver appearance. I use a copper penny glaze and fire beyond cone 08 when doing a wood fire, and had the same results on paper clay and regular raku clay. The results were ok and I may try to repeat the results. Not sure the attached photo shows this very well. The fish head and area around the fish on the tile have the silver look. Link to comment Share on other sites More sharing options...
liambesaw Posted August 19, 2020 Report Share Posted August 19, 2020 Looks like it wasn't heavily reduced as evidenced by the lack of copper lustre and gray bare clay. The copper penny glazes are supposed to have a specular copper film. Link to comment Share on other sites More sharing options...
karenkstudio Posted August 19, 2020 Author Report Share Posted August 19, 2020 My reduction was the same as I always do. Link to comment Share on other sites More sharing options...
neilestrick Posted August 19, 2020 Report Share Posted August 19, 2020 If the black areas aren't very black, then you didn't have good post-firing reduction. Either the pots cooled too much before going into the can, or there wasn't enough combustible material, or the can leaked, or they were removed from the can too soon. I would also expect your copper penny to be a lot brighter if it had better reduction. The good news is that you can just refire them if you don't like the results. Link to comment Share on other sites More sharing options...
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