Mold that appears in moist clay is not only harmless, it's beneficial. Mold will improve the clay's plasticity, making it easier to work with. Some people even introduce organic matter such as old rotting leaves into their clay to promote the growth of mold.
Ceramics
Today
Clay recycling: Dry the scrap clay on the bisque kiln or in kiln room (this loosens clay particle bonds--critical step). Slake (wet) it by pouring water over scraps in 5 gallon bucket. Let it sit for a while, then poke with stick to mix and debubble it. Pour off excess water into another bucket. Leave in kiln room till dry enough to spread on boards. Wedge when workable, store when proper consistency.
Fast "souring" of reclaimed clay can be achieved by adding about a cup of organic cider vinegar to each 50kgs during the "accumulation" stage. Wedge thoroughly, then leave well wrapped in plastic for a week or three. The longer you leave it the better, but at least this way you don't have to leave it for a year before you use it!
Ceramics
Today
Place wet, and or dry clay into a bucket and cover with water. Freeze over night. Thaw, pour off water, and wedge when sufficiently dry by using a plaster wedging table or just air dry it.
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Guru Spotlight |
Carma Spence-Pothitt |