Well, I’ve used Damp Boxes and kept clay wet for up to a year in these babies. And I’m finding this method is perfect for the brief intervals of time I’m able to sneak out to the studio. It’s a cheep and easy solution.
In a nutshell, it works because of the way plaster absorbs water. If plaster is dryer than clay, it will draw moisture from the clay. If the plaster has been soaked I water, then it keeps the clay from drying out and maintains a humid atmosphere within the box.
I cut these circles out in early October before Cooper was born. When I finally got around to turning them into Minis, it was the end of January but the clay was still perfect to work with!
Here’s how to make a Damp Box:
- Allow plaster to set/dry.
- Add water. How much?? Depends on the size of the box. I add water till there is 1/8” of water and then wait till that is absorbed. With a new damp box, it could take several rounds of adding water and letting it absorb. My damp boxes are 7 years old, so I occasionally add more water to “recharge” them. Basically, you want it to be wet without having pools of water on top.