1. References

2. External links

Conventional soft clay building techniques can be used with soft paper clay. This is because there is no physical difference between soft clay and the same clay as a soft paper clay, except the addition of a small percentage of tiny inert cellulose fibers. However it is recommended to use less fiber in paper clay on the potters wheel, particularly if the leather hard work is to be trimmed on the wheel. Paper clay can be made from left over throwing slip from wheel throwing. It is widely used by potters to repair cracks in dry, conventional clay, as well as dry paper clay.

Thinner and taller work can be built with partially dry or completely dry paper clay. Re-wetting paper clay is faster with paper clay than pure clay, as the paper fibres pull water more quickly into the clay body. The damp sections can be then joined. Accelerated drying of paper clay work is possible, and results in less warping and cracking, compared with drying conventional clay. The more fiber in the paper clay, the more rapid the drying with less warping and cracking, and the quicker dry-to-dry joins can be made.

The firing process for paper clay is similar to firing of conventional clay. The clay still needs to be completely dry before firing so the change of water into steam does not cause the clay to explode. Maximum firing temperatures, firing schedules and types of glaze to use for paper clay, are the same as that used for the specific clay used in the paper clay. Some recommend slightly higher firing temperatures. Because dry paper clay is more porous and has greater tensile strength than dry clay,^[3] single glaze firing is possible. Due to its higher dry tensile strength there are less breakages during handing and kiln loading. ^[4]

Replacing some of the clay with fiber, will reduce the thermal mass of clay, in turn reducing further the energy required to fire the work. Changing to paper clay from conventional clay offers considerable energy, financial and time savings when firing ceramics in educational institutions.

Nonconventional clay techniques are now possible after adding processed cellulose fiber to any clay: First, joining dry-to-dry paper clay and dry-to-soft paper clay are the most radical new techniques. Secondly, metal supports and ceramic material may be used within paper clay, with less cracking than conventional clay ^[5]

A new aesthetic has also emerged from combining paper and clay art traditions.^[6] For example, dry paper clay is stronger than the same clay without the fiber, so work can be made thinner, and more delicate.

Using paper clay require less technical skill than conventional clay, so beginners can focus more on the creative expression of their ideas. For example, handles of soft paper clay can be added to a completely dry paper clay pot without distorting the form. Other forms built with coils no longer need to be correctly joined before drying, instead, after drying the form, paper clay slip may be applied to join the coils and fill any gaps. Breaks and cracks in both dry and fired paper clay work can be repaired with paper clay slip. ^[7]

References

• Juvonen, L., (1997) "Using paper fibre as a substitute in ceramic clays", 8th CIMTEC World Ceramics Congress, Finenze, Italy June 1997 Table 1 p. 3, Table 3, p. 5.
• Campbell-Allen, B., (1997)" Where There's Smoke... Paperclay in the Anagama - a new technology in an old setting.", Pottery in Australia, (36), 1, 16-18
• Hay, G. (2006) "A Paperclay Update", Ceramics Technical, 22, 39-40
• Mau, L., (1997), "Paperclay and Steel", "Ceramics Monthly Magazine", May, 45, 5
• Gault, R., (1999) "Paper clay A Primer", "Pottery Making Illustrated Handbook", Fall, 87, 25-30
• Gault, Rosette (1993), Paper Clay for Ceramic Sculptors: A Studio Companion, Seattle: Clear Light Books.
• Gault, Rosette (1998), Paper/Clay and Method of Preparation, United States Patent no. 5,726,111, USPTO.

External links

• Ceramic paper clay sculpture information
• A good overview
• combining paper clay and metal
• US patent holder

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