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High Bridge Pottery

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Everything posted by High Bridge Pottery

  1. Chimney Entrance Reduction

    Interesting question that I don't really know the answer to. Read through the pages a few times and it still doesn't make much sense. He says "the inlet-flue areas must be equal to the exit-flue areas" then below tells you to restrict the exit flue. The only thing I can think is he also mentions "If the exit flues are too restricted, this will slow down the flow and retard combustion efficiency" I guess maybe he is restricting it a bit but not too much to slow down the exiting of gasses without destroying combustion efficiency.
  2. Black Iron Oxide

    For some reason I always assumed black iron oxide sold was FeO because it is black. After some googling people seem to say it is Fe3O4. The only MSDS I can find for black iron oxide says Fe2O3 so not much clarity there. What am I buying?
  3. Help me alter this glaze recipe...

    Is it not coming from the terracotta?
  4. Black Iron Oxide

    That's why it's confusing, two types of iron oxide are named black iron oxide.
  5. Black Iron Oxide

    Pretty sure you are right, just always thought it was FeO. Always good to be wrong as long as you find out you are wrong
  6. Expert knoledge and eyes needed for a failed cone 6 fireing

    What do you mean by it is a reduction kiln?
  7. I got to a point where it is usable to fire a kiln besides overshooting the set point badly so lost some drive as I hit a natural stop of it somewhat working. The next step to work out how to fine tune that seems complicated and put me off a little. I will get back to it. I always find the hardest bit is getting motivation to sit down and start, once I start I get really motivated but I struggle to force myself to do the first step of sitting down. Also the kiln is in my bedroom and I don't actually want to fire it properly to save slowly poisoning myself or burning down the house. Been looking at moving house so lots of other stuff going on with that, need a space with a dedicated pottery room or shed. It is not exactly the safest setup
  8. Interesting, seems a bit like python. Makes me want to start back up my controller project but I keep opening it up and forgetting where I actually got to in the process I like python and using matplotlib, there seem to be a lot of data scientist using python but maybe that is because I watch a lot of python related videos.
  9. If it seems to match up with how far away the temps are from the set-point then it makes sense in my head. Also seems a useful thing to log. What is R? Just some simple graphing software?
  10. I would guess sp = set point, dunno about out2. Could be to do with the PID value, if it overshoots the setpoint does the out2 go negative? Makes me wonder why they don't graph it live while firing.
  11. Shopping for My First Kiln

    What's 10 volts between friends power supply in general is not consistent and can easily vary 5-10 volts anyway depending how many people in your area are using power.
  12. Falcon heavy launch, probably the best thing I have seen all year.

    1. Show previous comments  6 more
    2. LeeU


      Envy.  As a kid, I saw a mid-'50's rocket launch from the swamp (with quicksand--I remember my aunt warning me not to go wading) directly across from Cape Canaveral. Have never forgotten the awe and majesty of that. I think about that uplifting (pun intended) experience sometimes when I am feeling really down about the idiocy/greed/hatefulness of the human species. 

    3. High Bridge Pottery

      High Bridge Pottery

      Would love to see one in person, it was awesome just watching the live stream.

    4. Denice


      My husband, son and I were vacationing in Orlando and went to see a Space shuttle launch.  They had been having trouble with the shuttle so launches weren't happening very often.  We took a chance and got up at 3 in the morning and drove to a look out point.   They almost cancel it three times and then decided to launch,  the roar of the engine was impressive but the shaking of the ground so far away was amazing.  We could have been a launch guest,  my husband's second cousin was head of the space shuttle program.  We decided to watch from a distance and not bother him even though other family members had.  My in-laws were special guest to see the Hubble telescope launched into space.    Denice

  13. Shopping for My First Kiln

    But they do have 240v coming into the building just in two different wires that each have 120v potential to ground. Going between the two they get the full 240v.
  14. Shopping for My First Kiln

    I still don't understand why you get 240v coming into premises and then use it as 120v.
  15. Seeing is believing

    Nice work with the test to prove your point Always worth testing even if the information comes from knowledgeable sources (within reason)
  16. making my glazes and failing

    Not sure adding silica will help it melt.
  17. Soda-Ash Wash Food Safe?

    Think I have been out the glaze game for too long. I need to catch up!
  18. Soda-Ash Wash Food Safe?

    How do you throw them away? Poor little things I have two boxes full of them
  19. Soda-Ash Wash Food Safe?

    I think the idea is that instead of all the soda ash being on the pot all at once it is slowly added through a few hours or however long of the firing. I'm still not sure this means you couldn't get very close to the same results with the right amount of soda ash and length of firing. Does the chlorine in salt make any difference? I would think it might compared to soda. I only had the chance to salt fire once, never tried soda.
  20. Thrown Pots from Extrusions

    They certainly made it look a lot easier than it is. I had a few goes and was nowhere near strong enough to move the clay into shape. I think I remember the owner saying he paid £17($25, €20) a ton for the clay and it comes from a coal mine near the town I grew up in. Was a very nice clay too and they extruded some pipes for us to take back to the studio. Great video, they have problems with the residents as you can see from the fumes generated by the kiln. At least it is only once every three months. The underfloor heating was the old roman style (might be incorrect) where you had a fire that heats tunnels under the floor.
  21. Soda-Ash Wash Food Safe?

    @Sputty Yes That's exactly who it is. About 30 miles west of Newcastle upon Tyne
  22. Soda-Ash Wash Food Safe?

    There is a place near me that I visited a good few years ago now that used an old pipe making place to make flower pots. They fired with coal but I am sure it was to cone10. Had a beautiful beehive kiln
  23. Soda-Ash Wash Food Safe?

    I think you are the oddball by having an interest in the clay body, I blame your crystal addiction. I hope to one day become versed in the art of clay body. On topic. It is food safe in real terms of not leaching Lead or Cadmium, if it is hygienic to use that is another question. I don't think I would use it on the inside but I see no issue with the outside even if it does slowly change how it looks.
  24. Ian Currie Test Tiles Forums?

    I think I can picture what you are looking for but it's not something I have come across. Maybe a test will come to mind while I dream at night.
  25. Ian Currie Test Tiles Forums?

    Closest things I have is this tile with 100% soda feldspar or the one below with 50/50 soda feldspar and whiting. Never bought any neph. Cone10

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