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

• https://old.reddit.com/r/Ceramics/
• Kiln_Controller
• Making Casting Slip: https://www.youtube.com/watch?v=9I3XE3D6Nqs
  • Clay and Water to Thick Oatmeal (200 parts dry clay, 50 parts water, ballpark)
  • Mix in 4 parts Sodium Silicate and 1 part soda ash until half-and-half consistency.
• The Competition: https://www.youtube.com/watch?v=2JWwIpmHLO8
• Production Moldmaking: https://www.youtube.com/watch?v=5rUq9m_mIW8
• Slip Chemistry : https://www.youtube.com/watch?v=dmj7XiOd1K4
• Color Inspiration: https://old.reddit.com/r/Ceramics/comments/19d754y/so_happy_with_my_most_recent_round_of_pieces_and/
• Motawi Tile: https://www.youtube.com/watch?v=lv4ITBL70nQ
• Pinstripe Underglaze: https://old.reddit.com/r/Ceramics/comments/19d754y/so_happy_with_my_most_recent_round_of_pieces_and/
• Slipcasted Bowls: https://old.reddit.com/r/Ceramics/comments/12zk9um/a_few_of_my_cute_slipcasted_bowls/
• This isn't a faux fountain: https://old.reddit.com/r/Ceramics/comments/16k9yjx/trinket_or_jewelry_dish_with_melted_glass/

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.
  • 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 water)
• barium carbonate to capture salts
• sodium ash to dissolve lignite (small)
• filter to remove large lignite

Images