Oven-hardenable PVC plastisol, "liquid polymer clay," is a complement to polymer clay that can be used as an adhesive to combine pieces, or to create various effects. Once conditioned, the clay will remain pliable until the particles eventually re-adhere. This involves kneading the clay by hand, passing it between two rollers, or using a low-shear mixer to break up any resin particle adhesions. Polymer clay generally needs to be conditioned before use. It is used to create sheets of uniform thickness, to mix colors or create variegated sheets, and to condition (soften) the clay. Professional polymer clay brands shrink very little when cured Brands of polymer clay include Cernit, Oytra, Fimo, Kato Polyclay, Sculpey, PVClay Brasil and Crafty Argentina.Ī home pasta-making machine is a popular multi-purpose tool for polymer clay artists. This temperature is significantly less than for mineral clays and can be achieved using a home oven. Curing occurs at temperatures from 265 ☏ (129 ☌) to 275 ☏ (135 ☌) sustained for 15 minutes per 1⁄ 4 inch (6.4 mm) of thickness. Polymer clay remains workable until cured. Special-effect colors and composites include translucent, fluorescent, phosphorescent, and faux "pearls", "metallics", and "stone."Ĭustom built clay conditioner for industrial use. Polymer clay is available in many colors, which can be mixed to create a wide range of colors or gradient blends. Small amounts of zinc oxide, kaolin, or other fillers are sometimes added to increase opacity, elastic modulus, or compression strength. Mineral oil, lecithin, and odorless mineral spirits can be added to reduce its viscosity or alter its working properties. The base resin can be modified in various ways. Various gelling agents are added to give it this property, such as aminated bentonite, metallic soaps, or fumed silica. Plastigels retain their shape even when heat is applied, which is why polymer clay does not melt or droop when oven cured. This plasticity is what makes it useful as modeling clay as opposed to putty or paste. It is a high yield thixotropic material: when a sufficient force is applied, the material yields, flowing like a viscous liquid until that force is removed, whereupon it returns to being a solid. Polymer clay plastisol is also categorized as a plastigel because of its rheological properties. Polymer clays contain a basis of PVC resin and a liquid plasticizer, making it a plastisol.
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