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Found 10 results

  1. I tried to use the glaze calculator of glazy.org It is very interesting but I can not understand if it is possible to know the ideal firing cone. For a "normal" not runny glaze. It seem strange for me that I can not see differences according to different cone firing. Underfiring and overfiring indications.
  2. I'm preparing some recipes for cone 6-7 glazes with washed wood ash. It is not very important that these recipes are perfect, it is important that they are enought different (regarding characteristics of the ingredients) for future experiment with oxides and correction with clay, feldspar or other raw materials. I'm thinking also to mix them one with the other. It is also important that they are not too much problematic, as probably the 4 and 6 recipes that will need to correct spodumene concentration! Recipes 1 (already prepared should be ok) 29,4 Potash feldspar 29,4. Ball clay 36,2 Washed wood ash 5 Bentonite Recipes 2 (already prepared schould be ok) 29,4 Potash feldspar 29,4. China clay 36,2 Washed wood ash 5 Bentonite Recipes 3 (probably ok) 39,3 Soda feldspar 6,2 China clay 21,8 Washed wood ash 6,6 Bentonite 20,4. Quartz 5,7. Zinc ox. Recipes 4 (needs correction) 44,4 Spodumene 22,2 Ball clay 6,8 Washed wood ash 7,1 Bentonite 4,45 Talc 10,6 Quartz 4,45 Zinc ox. Recipes 5 (to have red with red iron ox.) (similar to the original recipe) 44,5 Cornish stone (original recipe was 46,7 potash feldspar) 3,8 China clay 14,3 Bone ash 6,6 Bentonite 16,1 Talc 10,7 Quartz 4 Litio carb. Recipes 6 (hoping to have green with chromium ox.) (needs correction) 46,7 Spodumene 5 China clay 14,4 Washed wood ash 14,9 Colemanite 5 Bentonite 14 Quartz
  3. Hi there. I love these glazes that Seth Rogan does - does anyone have any idea how they could have been done?!
  4. Hi everyone, Hobbyist ceramist with a few years of experience here, but not so much glaze chemistry knowledge. I make work at a studio in Germany since a few years and since the summer, we noticed a lot of new issues with various glazes used at the studio. Nothing seems to have changed a priory with the way we do things. We fire with 2 different Rhode ecotop kilns at 1220 celcius. All ours work is made using a white stoneware clay from one distributor. We order commercial glazes from the same distributor and a few other glazes from another one. We've been using the same glazes for years and the same firing cycle as well. We received a new order of clay and glazes in August from our main distributor and since that, we started to notice an increasing amount of dunting. The issues are mainly with work from beginner students that are taking classes at the studio and that are perhaps applying glazes a bit too thick. This is something that happens regularly but didn't usually result in dunting before. Then recently, I also started to have shelling or slight shivering issue at the rims of cups on some of my own pieces when using one particular glaze. It's a matte transparent glaze I've been using for years and never had issues with. Is it possible that it is the clay body that is creating all these new issues? What is the best way to trouble solve from here? I emailed both distributors so ask if they know of any changes with their products already ( waiting on an answer) but any other tips I can get from someone with more experience would be much appreciated!
  5. Hello, My white gloss glaze has recently started pinholing I believe. We have been using it for years with no issue. i initially started with the kiln it is firing to temp. We fire slow bisque and slow glaze programs to 06 and 6. I have tried bisquing to 04 with a hold on the end but the defect came back... I have tried a hold on the end of a glaze firing (20 minutes) with little improvement. We have tried the ware with this glaze in 3 different kilns all have the same problem especially on larger ware. We have also tried wiping down the ware lightly with a sponge on both sides did not help. I am thinking it must be the glaze. But I have no idea where to start. Help.
  6. Loking at old glaze book. What are your predictions for this c 03 glaze DeBoos Frit 3134 90 Bentonite 20 Addtitives Rutile 5 Rio 2 Am goingto mix today. Nog lookin forward to handling the bentonite. Looking for an opaque base to cover terracotta for a student...old school student come back to area for 6 months covid and I relented!
  7. How do i do this effect in which there is no glaze in the lines between the spaces? should i not glaze those parts? or do they get that worn-out look on their own? I will be very grateful to the people who help me. I think this effect is incredible.
  8. Hello all, wondering if you can help with a new problem. I’ve used the same earthenware body and brush on botz glaze for over a year no probs. I have an old sitter kiln and bisque to 03 then glaze at 05 this has worked till now... suddenly my pieces are crazing about a week or two after firing (not immediately). It’s shuddering for some reason. I am making slightly chunkier pieces, could this be why? Any ideas why this is now happening would be great!
  9. Hi Everyone! Longtime lurker. All the information you post has been SO HELPFUL to me as I start to get my fledgling pottery business off the ground. I'm looking to make the switch from commercial to homemade glazes in the near future and have some picked out that I'd like to replicate. Mostly from Mastering Cone 6 Glazes. I was wondering, for those of you that operate out of a home studio, how many homemade glazes do you keep on hand? Thanks! Katie Piro
  10. From the album: Rogryphon's stuff

    Leftover bottom of the jar glazes, looks very nice.
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