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Found 7 results

  1. Cheers! I thank you very much if anyone can consult. I don't know why in the black or red ceramic paste (which I have high temperature), my faldespatico base enamels do not cover this clay. The enamels come out with bubbles.., although in white clay they work well for me. I understand that black clays contain ox iron and manganese..
  2. Good Morning: I want to try the bubble glazing with my high school students. I used the google machine to try and find a good recipe but everyone has something different. I tried a couple and every none of them worked amazingly well. I found the soapy liquid tends to run down the side of the pot and only leave a few bubbled spots. I tried using less water, that worked a little bit better. I also found I had to get the bubbles started and scrap the first layer off because these bubbles were to small. Does anyone have a recipe that they have had good success with and do you have any tips fo
  3. Hi guys. I've started my aquaitance with ceramics and glazes half a year ago. I still have a very basic understanding of chemistry and I have several problems I'd like to ask about. First is clear transparent glaze. I made around 10 of them taking different recipes, but all of them contain bubbles. I've tried bisque firing in various temps, from 600 to 950C and second firing slow cooling, dropping and slow cooling, but bubbles are there and their quantity is similar in all conditions. I know commercial glazes don't have such problems. Please help me to figure out what is going on. My thoug
  4. Hi, I fired my kiln yesterday and I received some mixed results. I follow a fairly strict process when firing my kiln (usually takes 8 or so hours) and have had good success in the past. I don't mix my own glazes yet, and use dry mix from Mayco. In this fire i received a fair amount of bubbles in the glaze. I have attached a few photos. I was wondering if this is a symptom of overfiring? I am sure this is ceramics 101 but any input would be great. thanks ~Mal
  5. Hello, I'm new to these forums and would appreciate some help! This isn't a new problem but I still don't know what causes it. On this particular problem piece, I used: Flint Hills "Porcelain" ^5-6 slip made with mason 6308 (Delphinium) mixed with the Flint Hills clay body Amaco HF-9 Clear Glaze. I do an 8-10 hour bisque to ^04; glaze firing is ^5 or ^6. I'm attaching a photo that shows a sample of bubbles that formed all along the edge of this platter. It happens most often on blue underglaze or slip, but I've had the problem with other colors. Sometimes a mug's rim will
  6. Hey everybody, been doing some testing and went through my first gas firing. (click my sig link if you are interested in the firing) I thought it was a disaster but others tell me not so much. Expectations will absolutely RUIN your happiness. Anyways, I have 2 glazes that I really kinda dig. The first glaze is a leach white which is nice and I'm still doing some tuning on that. Below is an example of the leach 4-3-2-1 glaze that went through the gas firing with too much reduction and made it to cone 9. I put a sprinkling of FE203 Red Iron Oxide and a sprinkling of Rutile as well just to see w
  7. Is it possible that particularly virulent bacteria continued to respire in the drying slipware? if yes, would that show bubbles burst at the surface visible to me before firing, or not, I wonder? I made my own porcelain paper clay slip with porcelain powder, dispex, tissue and water. It's worked before but I left this one and it stank. following instructions from tutor I added a bit of bleach but the bleach didn't completely kill whatever it was, not totally. It was grey in colour. I poured vessels, they looked fine (but the smell and grey colour lingered until they were totally dry). Biscuit
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