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High Bridge Pottery

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Everything posted by High Bridge Pottery

  1. You can get some interesting domains now, I bought www.thepottery.store but I haven't worked out what to do with it yet.
  2. G0026 is a weird one, doesn't even really look like the same glaze? Maybe the ink is throwing me off. Did you dip them at the same time? Not sure why the worse clay is a lot better. G0027 seems like the one to go with. I would try reducing the silica and/or alumina and see if that reduces the orange peel texture. The high SiAl is probably doing a lot for how it fits though so may start crazing again. If it does it would be interesting to try your spodumene again and see if adding a little makes it worse or better.
  3. With G0023 you were just swapping out custer for spodumene? Strange results. If the G0027 is the closest to what you want then I would go from there. Can you post a picture of the 0.1 and 0.2 boron ones? Maybe G0026 too
  4. What's the problem with having high LOI? I never found it causes any problems, especially in cone10 glazes. Always found whiting the best CaO flux source. I hate trying to sieve wollastonite so don't use it, clogs up the mesh. and takes me 10x longer. The Silica and Alumina look too high for me but interesting to see what results you get.
  5. Why do you think adding say 0.1 Li2O and 0.1-0.2 B2O3 decreases durability? I think a good mix chemistry is better for durability in most cases. Too much of any oxide is bad for this so it seems a good option. Sure you can make a nice glaze with only Na2O and CaO but why not add some more flux into the dance that can also lower COE. I don't know how adding silica or clay is any easier or less complicated than using spodumene and a frit. Why ignore the calculated COE values when they line up with tests? The 6.5 crazed less than the 6.7. Even if the numbers are for a theoretical final
  6. The last thing I was working on is a bubble free transparent. It's a slightly odd recipe as I was trying to remove any silica or clay. I was also removing zinc because I hear it is bad with some colours, and I don't know how well it reacts in reduction firings. Fired to cone10 oxidation on the tile. It is true that you don't need boron at cone10 but I see no negative reasons not to include it. I think your observation that a lot of the recipes are probably more a cone11 is a good one.
  7. I like using a boron frit at cone10. Much better than using zinc as a flux.
  8. A little lithium has always gone a long way to stoping crazing for me. I would try the spodumene addition. I would reduce the silica and alumina, but that's just me. @Bill Kielb What is the R2O/RO looking at? Is it just the alkali metal oxides ratio to alkaline earth metal oxides?
  9. Whiting has that fishy sea smell to me. Guess that's because it's made from sea shells. Dolomite and talc look similar to me. Silica, not sure, firing a sample of each will give some good data to guess from. Maybe do a sample by itself and a 50/50 mix with silica.
  10. I always found it easier to open the burners all the way and use the single regulator after the tank valve. Whatever you find works best for you is the best.
  11. Make sure it's not an FTL (Faster Than Light) code. In this forum, we obey the laws of quantum physics!
  12. Found a house with space for a studio. Been a long 3-4 years with little to no pottery ;[

    Excited :DD

    1. Show previous comments  6 more
    2. Min

      Min

      So happy for you Joel! 

    3. High Bridge Pottery

      High Bridge Pottery

      Looking forward to being able to post some stuff here again :D  Few months and I should be set up. Have two weeks off work the end of next month as the factory is shutting down so plan to be moving in by then.

    4. Denice

      Denice

      Isn't it nice when a factory shut down works to your advantage.    The company my husband worked for shut down at Christmas for two weeks every year.  Most people used some of their vacation time,  one year they shut down  for over a month.  My husband was promised a job when they reopened  so we decided to take a long vacation in New Mexico and Texas.  We did a no maps, reservations, computers  trip and the areas we were in didn't have cell phone service.   We found ourselves at the strangest little towns and tourist attractions.  Now that he is retired I hope to do it again.   Denice

  13. Where's ma test tile to look at! Don't leave us hanging
  14. Is there anything on the timers that you can twist? Never even seen a fixed interval timer and a repeat cycle timer. Also weird that the bottom elements are not controlled by the infinity switch. Interesting kiln.
  15. A lot to me is just more than my old commercial kiln would click the relays. I am using mechanical relays so I guess it is much easier to hear it. Do you think as long as you can keep it cool then there is not much to worry about with SSR's? In this picture you can see my test, it does wobble a little on the climb so could be much better but it is pretty close. It does get worse as it goes up and I have never tested past 900c so some tuning is needed. I just had no idea how so bodged this way. The big rise/drop is because I didn't code going from on for 60's to off for 60's right and it s
  16. I read a few things on pid tuning and was very confused on what to do, the one you posted looks a little easier for kilns specifically. I just ended up using the pid code to read the temperature difference from setpoint + actualtemp with p=1 i=0 d=0. Does 2 seconds not get the relay to cycle on and off a lot? Maybe that has a lot to do with my pid use I ended up deciding every 60 seconds if the power should be on for 1/6th of the 60 seconds up to 6/6th. That got things to work pretty well and only turn on and off once in 60 seconds.
  17. The only rule I can find says information is presented at your own risk.
  18. Are you deciding if you should turn the relay off or on every 2 seconds? How did you come up with the PID values to use?
  19. In Shanghai airport on my way to Australia for Christmas and the only thing that I can seem to access is this forum ;D. Not blocked by their fire wall.

  20. Here's the MAX31855 circuit diagram if needed. I also have a board layout but probably cheaper to just buy the module from adafruit
  21. I found sometimes the MAX31855 spits out NAN when reading the thermocouple. Were they the kind of errors you were getting? @jbruce Have you seen the MAX31856 chip that can be used with all thermcouple types? https://www.adafruit.com/product/3263
  22. Was there an issue with element corrosion? People always say it is a bad idea to combust things in electric kilns but I dunno how many have actually tried. I would be interested in the story.
  23. After 1.5~ years working as a receptionist and saving money I have moved to Stoke-on-Trent to find a job in a pottery factory :lol:

    1. Show previous comments  2 more
    2. High Bridge Pottery

      High Bridge Pottery

      Found a job as a belt attendant, lots of moving and stacking pots in the decorating department :lol: not the most exciting work but better than answering the phone.

    3. JohnnyK

      JohnnyK

      It's a foot in what may be a very big door for you...GOOD LUCK!

    4. Joseph Fireborn

      Joseph Fireborn

      YAY! Fanfreakingtastic! Best of luck to you.

  24. I find if I wiggle my head from side to side they can appear from the glowing mess as your brain picks up the outline of the cone. No easy answer, they are just difficult to see. Do you use any welding glasses for eye protection / decrease light and make it slightly easier.
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