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Luca Ask

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  1. Yes, of course! I dont want to loose too much time in trying to make calculation, but it was interesting to play with the calculator and I realized that it didn't make any sense to add wood ash as ingredient material: because I use washed wood ash. Washed a lot. It is too much different. Probably it didn't make sense also adding washed wood ash as ingredient material in the glazy calculator. But at least it might have some little sense! Do you know if washing the ash you loose also the magnesium or only sodium and potassium?
  2. Yes, I have seen it the last Saturday. Very interesting. Thank you for giving me the link! Glaze calculator is an interesting tool, could be interesting to have the possibility to add temporarily a new material of which the hypothetical chemical analyzes are inserted.
  3. I would like to try and use the glaze calculator for some my recipes with washed wood ash. I tried using the materials wood ash and mixed wood ash. I noticed that the analisis used for these ash are all as unwashed ash.Is there a possibility to use in the calculator washed wood ash as a material??Is there some material that can be enought similar?I know that wood ashes are very different one to the other, but this is true in the same way for washed and unwashed ashed.It could be interesting to add washed wood ash as a possibile material to use in the Glazy calculator.
  4. 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.
  5. I tried to use the glaze calculator! It is very interesting but I dont understand how I can know the ideal cone to fire the glaze recipe. Is it possible?
  6. I have tried to play with the glaze calculator. It was new for me! My proposal is: 24 Spodumene 23 Cornwall stone 18 "Mix" Wood ash 7 Bentonite 5 Ball clay or 10 15 Silica or 10 8 Colemanite
  7. I use more bentonite to adapt recipes to single firing. I have a book (only about single firing) that advises to add 5% bentonite to a glaze recipe to adapt it to single firing.
  8. I will try, I never used it.
  9. No, I'm just looking for a normal glaze, trasparent or matt or semi matt. The important thing is to experiment colours and effects with raw materials and wood ash as flux. It is better for me if the glaze is not runny at the moment. I will try only 1 runny recipe I think. The one that Min gave me.
  10. Thank you very much! Don't worry, it's right to start, at the moment it's like a game for me.
  11. Recipes 4 (possible correction) 25 Spodumene 30,6 Soda feldspar 10 Ball clay 7 Washed wood ash 7 Bentonite 5 Talc 9,4 Quartz 5 Zinc ox. 1 Lithium carbonate The original for cone 6 it have a satiny quality (I probably fire more near to cone 7): 70 Soda feldspar 3 bentonite (i need more for single firing) 3 lithium carbonate 7 dolomite 5 zinc oxide 12 quartz
  12. I dont have calcium borate frit at the moment. I have no type of frit. The original recipe was from "Colour in glazes" of Linda Bloomfield Soda feldspar 47 Calcium borate frit 15 Whiting 13 China clay 5 Quartz 17 + 0,5 Chromium oxide (for cone 8). I need for cone 6-7. I would like to add litium with spodumene. I have soda feldspar and I can decide for example to use 20-30% soda feldspar with 30-20% spodumene instead of 47% spodumene. I can use more wood ash in order to have more flux and reduce colemanite if 15% is too much, or use ball clay instead of china clay.
  13. 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
  14. Ok, this is an experiment, I can not know analisis of my colemanite and borate frit of the recipe. I'm going to correct this recipe and the others with linear blend or triaxial probably. Or mixing one with the other. I would like a recipe with wood ash, high litium and boric oxide for cone 6-7 (without zinc oxide) and I have spodumene, colemanite and lithium carbonate. That could be the maximum advisable % of spodumene and colemanite in order not to have serious problems?
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