David F. Posted August 18, 2014 Report Share Posted August 18, 2014 I see the Falls Creek Shino recipe used in a recent CAD article uses both zercopax 9.4% and tin oxide 4.7%. I thought these are both opacifiers ...do I need both? I would like to mix up a test batch; but don't have tin ox in hand. How do you think it will turn out if I skip the tin ox? Link to comment Share on other sites More sharing options...
Mark C. Posted August 18, 2014 Report Share Posted August 18, 2014 I know nothing about this glaze or its firing temp but will say Zircopax and Tin do get used together. If it calls for both use both. I assume you are concerned about the cost of tin.Tin is like many materials it goes up in price and down depending on many factors -right now its up. Mark Link to comment Share on other sites More sharing options...
Tyler Miller Posted August 18, 2014 Report Share Posted August 18, 2014 Tin has some unique properties you can't get with zircopax. It has a tendency recrystallize in firings in a way that increases both opacity and whiteness. This is especially true of the old leaded tin glazes. This property makes it a much more effective opacifier and whitener than zircopax alone. Link to comment Share on other sites More sharing options...
TJR Posted August 19, 2014 Report Share Posted August 19, 2014 Tin is used with copper carbonate to get copper red blushes. TJR. Link to comment Share on other sites More sharing options...
Mark C. Posted August 19, 2014 Report Share Posted August 19, 2014 One of my red glazes uses tin.Tin as noted has unique qualities. In one of my glaze calc classes back in school I reformulated (before glaze softwarewas on the planet) a earthy brown glaze for cone 10 reduction called Wamo mamo which had a large amout of tin in it. I found you could subsitute about 1/2 for Zircopax before losing the tin qualities which we liked-I to this day still have that glaze called mamo II laying around. I heard this glaze was from Alfreds but never confirmed that. Mark Link to comment Share on other sites More sharing options...
David F. Posted August 19, 2014 Author Report Share Posted August 19, 2014 I'm not that concerned about the cost of the tin, all though cheeper is good. I really wanted to simplify the number of ingredients I have to stock. I have about 10 glazes that I think are ok, but i'm not thrilled with any of them. Here's the recipe....and a link to the before mentioned article https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB0QFjAA&url=http%3A%2F%2Fceramicartsdaily.org%2Fceramic-glaze-recipes%2Fmid-range-glaze-recipes%2Frecoloring-a-classic-trying-new-colorants-in-a-classic-pottery-glaze-recipe-can-lead-to-some-great-results%2F&ei=HEXzU5wPwv3JBJCbgYgM&usg=AFQjCNEZNT3qjexGXdziCkSuqu6jOExqtw&sig2=yEKovpVkiYo6de684dAiZg FALLS CREEK SHINO (CONE6) GB 18.7% Lith Carb. 6.5% Soda Feld 9.4% Alberta Slip 56.1% Silica 9.3% Zircopax 9.4% Tin Ox 4.7% Link to comment Share on other sites More sharing options...
TJR Posted August 19, 2014 Report Share Posted August 19, 2014 You have a lot of Alberta slip in that glaze. The function of Zircopax and Tin are as opacafiers to make a clear glaze into a white matt. Since you are not using these materials in that capacity, I would lose the tin and substitute zirco for it. I am just surmising. you would have to do a test, but it looks like the tin is extraneous. TJR. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted August 19, 2014 Report Share Posted August 19, 2014 Is this for Oxidation? I have used Malcolm Davis's Shino for ^6 reduction. It works at that temperature as well as ^10. Sorry. I see you are doing Oxidation. This won't work for you but it does have fewer ingredients. Marcia Malcolm Davis ShinoCone 10 Redux Nepheline Syenite 40.91Soda Ash 17.27 Kona F-4 Soda Feldspar 9.82 Edgar Plastic Kaolin 18.18 Om #4 Kentucky Ball Clay 13.82 Malcolm Davis is an amazing potter who has developed a number of carbon trap shinos. He does seminars which include his shinos. If anyone has attended one of his seminars and can share a few bits of Shino wisdom, I would love to read it.Photos of his work here: http://www.akardesign.com/art/ceramics/previousshows/davisshow.htm Link to comment Share on other sites More sharing options...
Biglou13 Posted August 19, 2014 Report Share Posted August 19, 2014 its a great glaze follow directions i got help here when i first made it its a standard at community studio where im at now i did lower the lithium to 5 and upped the silica on someones suggestion. wait to get the tin. and its not a shino by any stretch, falls creek shino IS NOT a shino author would prefer to call it oatmeal red. the malcom davis shinos are pretty amazing, and i recently used the RED malcom davis..... amazing. Link to comment Share on other sites More sharing options...
PeterH Posted August 19, 2014 Report Share Posted August 19, 2014 No experience with this glaze, but FYI Effect of different colourants http://ceramicartsdaily.org/ceramic-glaze-recipes/mid-range-glaze-recipes/recoloring-a-classic-trying-new-colorants-in-a-classic-pottery-glaze-recipe-can-lead-to-some-great-results/ Note from the originator, who now prefers the name Randy's Oatmeal Rust. http://www.potters.org/subject72393.htm Quote: Another interesting thing though, the tests with only one opacifier didn't breakred the way it does with both tin and superpax. Link to comment Share on other sites More sharing options...
David F. Posted August 20, 2014 Author Report Share Posted August 20, 2014 Thanks for the link to the originator, Peter. He says without the tin it didn't break as well as with tin. Thats what make teh glaze. Link to comment Share on other sites More sharing options...
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