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High Bridge Pottery

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About High Bridge Pottery

  • Rank
    Joel Edmondson

Profile Information

  • Gender
    Male
  • Location
    Newcastle Upon Tyne. England
  • Interests
    Rocks and fire

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26,550 profile views
  1. High Bridge Pottery

    Orifice Size for Propane Kiln?

    I used a 1.5mm drill for my orifice which is near enough 1/16th of an inch. Off the top of my head that works out at 60,000-70,000 BTU/h at 1 or 2 PSI but I would need to check the exact figures. Do you think the problem was too much air or not enough air? Maybe it is also not mixing great in the burner or do you have any kind of nozzle on the end? When starting I struggle to keep the temps from shooting up. Never had an issue with getting the temperature to rise. The orifice size is more related to how many BTU/hour you want at the pressures you can get, not sure there will be too much difference in how it functions although you seem to have found a bigger one better. Maybe the lower pressure allows for better mixing of the gasses. Do you have any photos of your burner? or a video would be great.
  2. High Bridge Pottery

    Ian Currie Test Tiles Forums?

    Them pesky eutectic. Maybe too much calcium? in corner C. It is reminding me of a tile I did with whiting and soda feldspar.
  3. High Bridge Pottery

    Lithium replacement

    I think this is the right point. 'The thing about toxicology is that everything is toxic at some level' If you are taking out the lithium you may as well remove the aluminium and most other things.
  4. High Bridge Pottery

    Lithium replacement

    I don't think lithium poses any toxicity issue, where did you get that from? I think having a good mix of oxides, including lithium will help retain other metals in the glass like copper or cobalt.
  5. High Bridge Pottery

    Question on mixing colorant batches

    64 seems pretty close to 65, I tried to understand the spreadsheet but I am to tired.
  6. High Bridge Pottery

    Community Challenge #9

    Sorry to hear about your dad passing away Life is a strange part of death. It's a shame they didn't work, I think there is something that would work but I am never sure what that would be.
  7. High Bridge Pottery

    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.
  8. High Bridge Pottery

    Help me alter this glaze recipe...

    Is it not coming from the terracotta?
  9. High Bridge Pottery

    Black Iron Oxide

    That's why it's confusing, two types of iron oxide are named black iron oxide.
  10. High Bridge Pottery

    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
  11. High Bridge Pottery

    Expert knoledge and eyes needed for a failed cone 6 fireing

    What do you mean by it is a reduction kiln?
  12. High Bridge Pottery

    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?
  13. High Bridge Pottery

    Downloading Firing Data from Genesis Digital Controller

    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
  14. High Bridge Pottery

    Downloading Firing Data from Genesis Digital Controller

    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.
  15. High Bridge Pottery

    Downloading Firing Data from Genesis Digital Controller

    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?
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