How to Use PMC >> Prev | Health & Safety / Storage & Shelf Life
Health & Safety / Storage & Shelf Life
Totally Non-Toxic
Precious Metal Clay has been certified by an independent testing facility to be safe in every phase of its use and to conform to ASTM D4236.
Issues of safety arise not from PMC itself, but in the normal use of the high-temperature furnaces used in the sintering process. These kilns should be positioned on a stable surface, away from combustible materials, with a foot of open space on all sides. Never leave a kiln unattended and take special care if animals or young children are in the area. As always, when working around heat, wear appropriate clothing and avoid clothes made with synthetic fabrics. There is little reason to stare into a kiln but if you do this, eye protection should be worn.
Storage and Shelf Life
You'll notice that Precious Metal Clay is packed in an air-tight foil pouch to preserve its freshness. Use this package or a good-quality plastic wrap (or both) to keep your clay moist. It is good practice to take out only what you can use in a few minutes and to add a few drops of water to the lump at the end of each work session.
All PMC can be rehydrated if it dries out, though it is difficult to achieve the homogenous consistency of fresh PMC. To restore dry material, poke the lump with holes or dice it into small pieces. Add water by kneading, then set the PMC aside to allow the water to penetrate; allow at least a day, more if the clay was very dry. With the sample wrapped in plastic, knead repeatedly to force the water into the dense metal structure. If you add too much water, spread the PMC on a piece of plastic, glass or waxed paper and allow it to dry to a useable consistency.
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