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AOEYnes

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About AOEYnes

  • Rank
    Newbie
  • Birthday March 26

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  • Website URL
    www.tromsoblat.no

Profile Information

  • Location
    Northern Norway
  • Interests
    Biblestudy and meteorology. Growing wheat
  1. It is definetly interesting to see the values, but with sediments, one bay can differ greatly from another so the clay in different places , with only miles apart can have quite dissimilar percentages of the different oxides, so using a table like this has no appliance when it comes to mixing.
  2. Hello, I have been in contact with different companies and labs and asked if they did oxide analysis of clay and how much it would cost. Some did not, some only analysed metal content, not oxides and some labs vere a bit expensive. I am hoping to, in time afford a thorough analyse from SGS Minerals, which would cost apprx 350$. I use marine clay, arctic brick clay which is ice age deposited everywhere here in Norway. This near polar area holds billions and billions of very fine earthenware clay. Much more finely particled than any other clay or porcelain. I am hoping to be able to be
  3. I have had pretty good results with 1 part calcium borate and 2 parts clay. Without any addition of oxides it have a tendency to crawl. That and the fact that calcium borate is quite expensive made me want to try GB. This glaze is intended to be used in kitchenwares, bowls, jugs, etc. Rustic and easy, so the glaze does not need to be crystal clear or super smooth.
  4. Ok, thank you. I am not very accustomed to the way of calculating. I try to have my recipes as simple and symmetric as possible because my base glaze are built around the same earthenware clay that I use for the bodies. The clay is arctic marine clay and I glazefire at 1040 C° Kaolin is much more refractory, or melt resistant than my marine clay. Mixing with marine clay should lower the melting point as it melts completely at 1150C°, or? Ok, I know the mix 2-2-1, GB-clay-kalifeldspar melts at 1260C°, but I cant go higher than 1100 when I use earhenware. And I want to burn my gl
  5. Hello, I have bought a bucket of gerstley borate, and have started making some glaze samples. I want to use GB as a cheaper alternative to calcium borate in my earthenware clay glaze. I have had serious problems with crawling, using 2 parts clay and 1 part calcium borate also. In my glaze samples now with GB I used 1 part kali feldspar, 1 part GB and 2 parts blue clay (grey earthenware), and same with 2 parts GB. 1-1-2 and 1-2-2, feldspar, GB, clay. And with additions of 0.4 parts FeO2 and 0.2 parts Pb02 (lead) . I was expecting to see this melt easily and completely, but
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