Ceramics: Difference between revisions

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** 40 fl oz thick oatmeal clay
** 40 fl oz thick oatmeal clay
** 12 ml sodium silicate solution
** 12 ml sodium silicate solution
** 1/4 tsp soda ash (dissolved in water)
** 1/4 tsp soda ash (dissolved in a tablespoon of water)
* barium carbonate to capture salts
* barium carbonate to capture salts
* sodium ash to dissolve lignite (small)
* sodium ash to dissolve lignite (small)

Revision as of 16:42, 22 September 2024


Notes

  • Fine Detail
    • Strikingly precise
    • wears away quickly - like in fewer than a dozen castings. (GPT says 30 - 50 castings)
    • This supports the 3 step mold:
      • 3D Print (costly, time consuming, high precision, master)
      • Silicone or Urethane mold (cheaper, rubbery / durable)
      • Plaster mold (good for 20 shots, cheap)
      • You could hit a rhythm of creating a new plaster mold every day, with 20 active molds at a time and a 24 hour pull cycle.
  • Porosity of the bisque is critical for underglaze adhesion.
    • Fire on the low end of cone 06 - 04?
    • Don't get the surface dirty.

Links

Recipes

Plaster

  • 1 Liter of Mold
  • 1 Kilo of Dry #1 Pottery Plaster
  • 0.7 Liters (kilos) of Water
  • slake 3 minutes
  • stir
    • For 5 minutes?
    • until uniform, as little as possible?

Slip

  • 1.75 specific gravity
    • Have tried as low as 1.7, which I like. Update: maybe a bit too thin, though I do like the slight castings it produces.
    • Have tried as high as 1.85, which is too thick for me.
    • Seems to effect the thickness of the casting - more so than does the dwell time before pouring off.
  • too much deflocculant = gels quickly
    • Just right = gels eventually, like hours
    • OK - never gels but very liquidy
  • recipe 1
    • 40 fl oz thick oatmeal clay
    • 12 ml sodium silicate solution
    • 1/4 tsp soda ash (dissolved in a tablespoon of water)
  • barium carbonate to capture salts
  • sodium ash to dissolve lignite (small)
  • filter to remove large lignite

Images