Best Casting Slip

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Casting slip is liquid clay formulated to be poured into plaster molds, where the plaster draws out water and builds an even wall along the mold surface. For home potters, slip casting is the gateway to repeatable forms, letting you produce matching mugs, planters, or figurines that would be slow to throw or build one at a time. Premixed slips save you from the fussy chemistry of deflocculation, and the main decision is the clay body: porcelain slips cast bright white and translucent, stoneware slips are sturdier, and low-fire slips suit hobby kilns and bright glazes. Check the firing range against your kiln, along with specific gravity and how quickly the slip builds wall thickness. These are the slips that cast cleanly.