smb Posted May 16, 2014 Report Share Posted May 16, 2014 I use ^6 soft brown stoneware. can I paint a motif on a bowl with red iron oxide and go over it with clear glaze and it still show through or will it blend in and not show up? A friend wants an Iroquois motif on the side and I thought if that worked it would look good. still learning and having a blast, thank you all for your wealth of knowledge Link to comment Share on other sites More sharing options...
williamt Posted May 16, 2014 Report Share Posted May 16, 2014 I guessing you are putting the iron oxide on leather hard and bisque fire? Or coloring bisque ware? I've tried both ways using iron oxide wash and high iron oxide containing slip. At cone 6 most of the iron oxide dissolved into the clear glaze - I think the fluxing action gets involved. At cone 06 I have had better luck with the iron staying on the work and out of solution with the clear glaze. Lee Link to comment Share on other sites More sharing options...
TJR Posted May 16, 2014 Report Share Posted May 16, 2014 I use iron oxide on Cone 10 Shino. If you want a clear line you paint it on top of the glaze. If you want a soft line, kind of blurry, paint it first, then apply glaze. Check out my gallery for confirmation.TJR Link to comment Share on other sites More sharing options...
Babs Posted May 16, 2014 Report Share Posted May 16, 2014 could try adding a little cobalt oxide and manganese to blacken the finished motif. May want to check that the glaze you are using doesn't move too much as it matures or your design will move also! Just test with avertical and horizontal test tile before you use it straight onto a bowl. Link to comment Share on other sites More sharing options...
williamt Posted May 17, 2014 Report Share Posted May 17, 2014 SMB, if you are doing reduction firing you can get the line described above. In cone 6 oxidation, the iron oxide usually fluxes into the clear glaze. In reduction the iron oxide reduces to metallic iron. I'm thinking SMB is looking for an iron oxide red, though black would also be appropriate. If you are going for an old Iroquois pottery look, it would be fired, probably less than cone 06, in a wood/pit fire, and would have areas of oxidation and reduction. Lee Link to comment Share on other sites More sharing options...
MichaelP Posted June 30, 2014 Report Share Posted June 30, 2014 This has been my experience too: red iron oxide disappearing under a transparent Coyote glaze when fired to Cone 5-6 in oxidation. Link to comment Share on other sites More sharing options...
timbo_heff Posted June 30, 2014 Report Share Posted June 30, 2014 Why don't you use an underglaze: they (almost) always work! Link to comment Share on other sites More sharing options...
synj00 Posted July 1, 2014 Report Share Posted July 1, 2014 How "brown" is the stoneware when fired? I did some dip tests on red / brown clay body and it didnt show up at all. It did lend an interesing sheen to the clay though. Almost like wood fired. A thicker aplication will give you darker results but you might find it ending up with a rough texture. (I did anyways) Link to comment Share on other sites More sharing options...
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