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Anyone working in ceramics knows how demanding clay can be. You have to keep your edges wet, and attach wet to wet. You have to make your pieces thick enough to support their weight. You have to dry it slowly, and green ware can sometimes crack before you have a chance to fire it. The list goes on and on.
Well it turns out that if you add paper fiber to your clay body, a lot of these limitations disappear.
One way to make paper clay is to do it yourself. You select the right paper (without shiny coatings, for example), soak the paper in water, then use a paint mixer to blend the mixture into pulp. Then you wedge this paper pulp into your clay. As a start, you might add about 5% pulp by volume.
Sound like a lot of work? Yes it does! That's why you can also buy commercially pugged paper clay. This comes in 25# bags, just like the clay you are used to. It feels and works the same as regular clay, but it is stronger, things attach easier, the finished pieces are lighter, and the paper burns out in the firing so it looks just like regular clay.
And the best part, at least for a lot of people, is that you can attach new wet clay to already dried clay! Imagine that!
When doing sculptures, paper clay is more forgiving in other ways too. You don't have to worry so much about keeping the thickness absolutely consistent to avoid cracking. The pieces support themselves better without collapsing. Flat pieces warp less. You can simply take your clay to limits far beyond what you previously thought possible!
Ceramic Paper Clays blend premium high or low fire clays (such as stoneware, porcelain or earthen wares, terra cottas, etc.) with lesser fraction of choice pulp. The fired and glazed ceramic is indistinguishable to the naked eye from a non-paper traditional clay. Pulp burns out in firing similar to wax. (Since people usually use paper clay in sculptures, we are selling a popular sculpture/Raku blend. This is also great for coiling, pinching, and handbuilding.)
While paper clay feels pretty much like regular clay, I have found that it dulls your tools faster. Some people are sensitive to mold, and paper clay does mold more easily than regular clay, especially if it is kept very wet (such as when reconstituting scraps).
You might not be able to find Paper Clay at your local clay supplier, That is because it is patented, and clay manufacturers must pay license fees to the inventor. But a number of clay companies do license and manufacture it.