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Jan jones

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About Jan jones

  • Rank
    Newbie
  • Birthday 03/09/1953

Profile Information

  • Gender
    Not Telling
  • Location
    Perth, Western Australia
  • Interests
    Sculpting, slip casting
  1. Converting FFF feldspar

    That'll be the 5 portions for the day then. Tee hee, well spotted.
  2. Converting FFF feldspar

    Thanks so much for the offer of help, I am a new hobby potter and using the lovely new book from Linda Bloomfield called : Colour in glazes, I do not have the precise composition of my materials from my supplier but, Am happy to test, test test. The FFF FELDSPAR IS: SiO2 67.7, Al2O3 18.9, , Fe2O3 0.16, CaO 0.72, K2O 7.62, Na2o 4.84 LOI 0.05. The Potash Feldspar is: SiO2 65.8, Al2O3 18.5, Fe2O3 0.1, CaO 0.38, K2O 12, Na2o 2.89, LOI 0.33 The Nephaline Syenite is: SiO2 60.5, Al2O3 23 , Fe2O3 0.1, CaO 1, K2O 1, Na2o 10.2 , LOI 0.2 I also have a problem with the rutile pink glaze from the book, , come , 8 oxidised, but is firing clear. the recipe is: Any hints gratefully received. Nephelline Syenite. 26 Whiting. 12 Lithium carb. 10 Barium carb. 3 Calcium borate fruit. 5 Quartz. , 44 + Rutile. 1.5 Tin oxide. 4 Kind regards Jan
  3. Does anyone know what proportions of potash feldspar and nephelline syenite can be used to replace FFF feldspar in a glaze recipe. FFF feldspar does not seem to be available in Australia?
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