marcello Posted August 31, 2014 Report Share Posted August 31, 2014 Hello I am attaching here a picture of a japanese tea cup. I was told by the potter this is Shinsha glaze, made with copper and gold" I guess this colour is obtained by reduction. Do you agree? Can anybody tell me a possible glaze recipe to imitate this work? Many thanks, Marcello Link to comment Share on other sites More sharing options...
Biglou13 Posted September 1, 2014 Report Share Posted September 1, 2014 most reds almost all reds are reduction for oxidation i would consider using combination of glazes good choice, and good luck studying historical glazes Link to comment Share on other sites More sharing options...
JLowes Posted September 1, 2014 Report Share Posted September 1, 2014 I found a link to a blog that has a recipe for Shinsha glaze. It is a reduction glaze, does include copper carbonate in the ingredients, but no gold (that seemed unlikely to be BTW.) It reads like a tough glaze to fire properly. The picture looked like a copper red with some thinning at the rim making the white, and possibly another copper containing glaze producing the green down low and inside. I am no glaze expert, but these are my observations. Some Google research shows a number of pots for sale with Shinsha glaze. Most have the red/cinnabar color and blushes of green, but much less pronounced than your example, but those may be on a darker clay body. John Link to comment Share on other sites More sharing options...
bciskepottery Posted September 1, 2014 Report Share Posted September 1, 2014 A copper red in reduction will give you that look; the clear on the rim happens because the glaze thins on edges. You also get green/clear from a copper red if it oxidizes or is too thin. For Cone 10, I use Pete Pinnell's copper red. Link to comment Share on other sites More sharing options...
marcello Posted September 1, 2014 Author Report Share Posted September 1, 2014 Thank you >I found a link to a blog that has a recipe for Shinsha glaze. It is a reduction glaze, does include copper carbonate in the ingredients, but no gold (that seemed unlikely to be BTW.) It reads like a tough glaze to fire properly. is it possible to post the link? > For Cone 10, I use Pete Pinnell's copper red. Where can I find the recipe? Many thanks!!!! Marcello Link to comment Share on other sites More sharing options...
macdoodle Posted September 3, 2014 Report Share Posted September 3, 2014 to confuse you some more- read this . http://digitalfire.com/4sight/education/copper_red_glazes_115.html Link to comment Share on other sites More sharing options...
PeterH Posted September 5, 2014 Report Share Posted September 5, 2014 An article on copper reds in an oxidizing kiln, if you are interested. http://www.tomturnerporcelain.com/_files/CopperRed_35DE.pdf Link to comment Share on other sites More sharing options...
marcello Posted September 7, 2014 Author Report Share Posted September 7, 2014 Thank you very much I have another question: since I cannot find anybody to teach me, can you suggest me a good book about reduction kilns, and how to properly manage the reduction process? Many thanks Marcello Link to comment Share on other sites More sharing options...
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