Paperclay

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Paperclay (sometimes translated as paper clay ) is a mixture of clay , paper pulp (as used in paper scooping) and water.

The mixing ratio can be up to a maximum of 40 volume percent paper pulp and 60 volume percent clay pulp. For processing, the paper clay pulp is dried on plasterboard until a mass that can be modeled is created. The proportion of clay in this mixture is always higher than the proportion of paper, which is why objects formed from it can be fired in a ceramic furnace without losing their strength when the paper parts are burned.

In contrast to "normal" clay, paperclay has extraordinary properties: objects formed from it can still be processed in almost all drying stages or even completely new attached to the formed object. The wall thickness of the modeled shapes can be from relatively thin to several centimeters thick.

During the burning process, the paper fibers burn with a strong odor and microscopically fine cavities are created, which make the finished piece of fuel lighter (around the paper portion) but still very stable (like with corals ).

Technical specifications

  • Firing temperature: 1100-1300 ° C
  • Dry shrinkage: 7.0%
  • Firing shrinkage (1200 ° C): 5.5%

literature

  • Rosette Gault: Paperclay. A new material and its uses . Haupt, Bern u. a. 1999, ISBN 3-258-05890-3
  • Liliane Tardio-Brise: Handbook Paperclay. Techniques-Ideas-Projects . Hanusch Verlag, 2017, ISBN 978-3-936489-57-6