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About AndreaB

  • Rank
    Advanced Member
  • Birthday 09/27/1962

Profile Information

  • Location
    Johannesburg, South Africa
  • Interests
    Ceramics obsession

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5,313 profile views
  1. Thanks Peter, I can now see how this works. The image that prompted this question had no indication of the effect that the addition would make. All the best
  2. Morning people, This question has probably been posted but I was unable to find anything. I have seen a couple of posts on Facebook where the information regarding the image states that Flux was added to the rim and the results were not what was expected. I can't grasp what was meant, can someone explain it for me. Many thanks. Andrea
  3. Hi everyone, Quick question: we use calcite alumina, or alumina calcined (in South Africa) under ware when glaze firing to provide a surface allowing movement to avoid cracking, what name does the rest of the world use? TIA Andrea
  4. Hi everyone, This is my first post of 2019, so I wish for all of you a wonderful year, filled with creativity. My question is (and forgive me for posting it if it has already been posted), I have seen pots that have not been glazed, no burnishing or terra sig and I'd like to know if firing a pot with underglaze only to glaze temperature. My glaze firing is to 1200C. Attached is an example made by a local South African ceramicist Dale Lambert. I believe that her work is fired multiple times. Thanks as always for your comments Andrea
  5. Hi every one, Happy Christmas to all and family. I've just purchased a SpeedBall Bos Elite wheel. The literature that came with it is vague about the voltage this equipment uses. Does it use 110 (American) or 220v (the rest of the world) hahahehe. Can anyone who has the Speedball wheel clarify, or tell me what v you use. Thanks Have a great day
  6. Hi Andrea

    I'm test firing a kiln and I need your opinion.   Cone 6 in the ASD, cones 5,6 and 7 witness cones. One set on bottom shelf by peephole and one set top shelf by peephole.  Kiln set for high fire.  The safety timer knob set for 20 hours.  The kiln is empty because I'm test firing and I'm very new at this!!!

    So the kiln finished firing and cooled.  I open to collect the witness cones.  Top shelf cones are what they should look like for cones 5,6 and 7....I'm happy with that.  I remove the next 2 shelves for the next set and the witness cones are white and standing straight up???? Why would this happen??


    1. Denice


      Is this a new or used kiln and what was your firing schedule?    Denice

    2. AndreaB


      Hi Nancy,

      Sorry it's taken a while to see your post. I'm afraid I'm really the wrong person to be answering this question. You should put it to the forum. My kiln has a temperature difference between the lowest and the highest shelves and this factor is always the case.  This also happens with the way you load your kiln. Top heavy or bottom, biggest pieces in the middle or at the bottom, etc. Have you fired anything since? It may also help you to take a photo of the load prior to firing so you can see how your loading is affected with regard to the cones. Curious as to why you set your safety timer to 20hrs,  Hope you have fun with your new kiln. Andrea

  7. I bisque fire to 1000 deg C and glaze fire to 1222
  8. Is there any advantage to leaving a vessel unglazed? I did try this and found that the surface scratched very easily. How could I avoid this happening? I did glaze the inside, my thinking being that if the vessel were to be used for food purposes then it would be food safe. I do like the look of a matt unglazed surface. A pic of a local potter's bowl is attached. Thanks
  9. Morning everyone, Just realized that I seem to always post on a Sunday morning lol. My question is: how can I apply luster with a smooth continuous line. Mine always has a blob at the start, peters out and then another blob when I reload the brush. Many thanks Have a great Sunday.
  10. Good morning to you all, I'm having a great deal of difficulty with getting my glazing right. A year ago everything was fine, I had a back op last October and have had problems ever since then. Took a break from throwing but came back in Feb, since then I've had one hand done for CTS and the other is on it's way to being done. Since the op my sciatic nerve has been damaged so I have problems with throwing, and indeed pain is probably one factor that is affecting my glazing. I was making forms that were hand built tall vases, glazing became a problem due to the length of time it takes
  11. AndreaB

    Slab vase

    Yes, but not much otherwise it drips and runs
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