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Canvas
You can make a sling out of canvas and use that for your mold. For example, take a piece of canvas and put it over the top of a large round garbage can. Where the canvas overhangs the can, wrap tightly with string. Place your slab on the canvas. You can get different curvatures depending on how tightly you pull the canvas. This same technique can be used with buckets for smaller slabs.
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Sherril Steele-Carlin |