Clay crafting

so i dug some clay, then made this cup, then put in furnace i build from random bricks. cooked it for couple of hours. and now at home i finally made some tea.
BUT now i starting to have doubghts. is it safe to drink from this? i don't how and why it could be dangerous, but now i can't stop worrying.
So, am i autistic or it's really could be not safe to use this cup?
P.s. any basic advises about clay crafting?

  1. 3 weeks ago
    Anonymous

    There could be toxic shit or heavy metals but probably it's fine. I doubt you got high enough temps for proper stoneware though so it may be fragile. Also, did you make any sort of glaze? That's usually where the toxicity issues are but there are plenty of simple and safe ones you can make which when fully fired are basically glass and without that and considering the likely lower temperatures your cup may be somewhat porous.

    • 3 weeks ago
      Anonymous

      > Also, did you make any sort of glaze?
      I totally forgot about glaze itself.
      And it looks like it would be nearlly imposible for me to make own glaze and i don't want to buy it from store.
      I had an idea to make something while using only materials i can find around me.
      Maybe i need to rethink it.

      • 3 weeks ago
        Anonymous

        Do you have a rock tumbler?

      • 3 weeks ago
        Anonymous

        just use salt ya dingus.
        japanese have been using salt glaze forever

        • 3 weeks ago
          Anonymous

          Looks doable. But still need yo reach 1300°c temperature somehow.

        • 3 weeks ago
          Anonymous

          Looks doable. But still need yo reach 1300°c temperature somehow.

          Don't use sodium chloride. It creates chlorine gas. The clever way to salt glaze in a low-temp home made ghetto kiln is to mix a little sand into the clay, then add some sodium carbonate or soduim bicarbonate. As is dries, the sodium crystals will effloresce to the surface and it fluxes the silica content in the clay into a glaze at relatively low temperatures. Experimentation will be necessary, but it should work. Be sure to paint the foot of the pots with wax or shellac before they dry so they don't self-glaze themselves onto the kiln bricks/shelves. The sand is to "open" up pores in the surface to encourage salt crystals. It may be wise to paint the entire outer surface with wax/shellac to get all of the sodium to effloresce on the interior where you need it. Look up Egyptian paste recipes for ideas on starting ratios.

          This is the origin of the discovery of ceramic glaze, and glass, btw. People noticed that the hot faces of some bricks glazed themselves and they figured out why.

  2. 3 weeks ago
    Anonymous

    its fine to drink from, the cup its self will start to mold/rot after a while due to liquid being trapped in the pores.

  3. 3 weeks ago
    Anonymous

    >why yes i do drink out of a solidified rectal prolapse

  4. 3 weeks ago
    Anonymous

    I would not use it since clay most probably has heavy metals.

    • 3 weeks ago
      Anonymous

      >dig clay out of the polluted, corpse-water filled river shore
      >some indian stomps on it with his feet
      >lasts for 1 serving before Pajeet throws it away
      My dad is real into India, I think he went on a trip there in the 70s or something for a few weeks. He remembers drinking chai on a train out of those cups.

      Is electrophoresis a new concept?

  5. 3 weeks ago
    Anonymous

    i wouldnt drink from it
    maybe glaze the inside with something non cancerous

  6. 3 weeks ago
    Anonymous

    Single-use non-glazed chai cups

    • 3 weeks ago
      Anonymous

      >dig clay out of the polluted, corpse-water filled river shore
      >some indian stomps on it with his feet
      >lasts for 1 serving before Pajeet throws it away
      My dad is real into India, I think he went on a trip there in the 70s or something for a few weeks. He remembers drinking chai on a train out of those cups.

  7. 3 weeks ago
    Anonymous

    ash glaze

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