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You can make a small press mold into a stamp for signing your work, or to impress into your piece and make designs. This works best if you want a raised design on your piece (since it is easier to carve into plaster than it is to carve away and leave a raised profile behind.) If you want a recessed design, read the next section. Stamps and sprigs are especially nice when used around a border, or across multiple pieces to achieve a repetitive design element.