Sort and Dry Your Clay Scraps
As you work, you are likely to have a number of scrap pieces of clay accumulate. This is true of hand building, and even truer of throwing. In hand building, if the scraps haven’t dried out too much you can re-work them without having to do much more than compress them back together and work the air out. If you are throwing, however, your scraps are likely to be quite wet and will include slurry.
Don’t throw these scraps away; you can recycle them back into usable clay again.
The first thing to…
Slake Your Scraps
Once the scraps are thoroughly dry, fill the bucket with water, covering the clay by several inches. If the clay absorbs too much of the water and re-emerges, add more water to cover the clay completely.
The clay scraps will slake quickly, giving you a bucket of slurry. Let the now-slaked clay settle, at least for several hours or even a couple of days. If you have a layer of water on top, gently pour as much liquid out as possible. I suggest doing this outside; it’s not as potentially hard…
Dry the Clay to a Working Consistency
At this point, the trick is to get the clay to dry out, but not dry it too much.
Optimally, if you are going to do this a lot, you will want to make a big plaster bat, a large plaster surface that you could work the clay on. (Plaster absorbs water, pulling it right out of the clay.) However, if this is a one shot deal, you can use the same idea without the plaster bat. Find some towels that you don’t care about saving; you can hose out the clay and wash them clean again afterwards, but the…
Store Your Clay
After the clay has dried to the right consistency and compressed or wedged, it is ready to use. If you don’t want to use it right away, store it in heavy-duty plastic bags. Freezer bags are good for small quantities.
Note: Most plastic is not truly air tight; air does move through the plastic, just slowly. Some plastics are much more air permeable than others.
If it will be several days before you use the clay, place the plastic bags of clay into an airtight container, such as a plastic tub with a tightly fitting lid. Clay can be kept in a workable state indefinitely if it is kept in an air-tight container with little to no air in the container with it. Clay is not like food. It can’t “spoil”. (It’s actually already decomposed — decomposed rock.) What it can do is dry out.