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OneFire Sterling PMC has a silver purity of 96%. It can be legally marked as sterling after firing.
OneFire Sterling PMC combines microscopic particles of metals in the proportions of approximately 96% silver with 4% copper. e metal powders are mixed with water and a nontoxic binder to create a material that can be worked as easily as modeling clay. Objects can be made with simple tools, then they are dried and sometimes rened further. e pieces are then red in a kiln to burn away the binder and fuse the particles into solid metal. e result has properties very similar to cast sterling silver. It can be polished, soldered, and patinaed just like any other precious metal.
One of the great things about OneFire Sterling PMC is the fact that you can use it almost anywhere. Choose a comfortable location with good lighting and youre all set. Modeling tools can be as simple as rubber stamps, childrens toys, cookie cuers and toothpicks. Avoid aluminum foil and aluminum tools, but otherwise anything goes! Youll nd that you will discover the tools you want as you go along. A basic starter kit will include a needle tool, a rolling pin, a couple small paintbrushes and a cra knife. Youll want a roll of plastic wrap, a small cup for water, and olive oil or mold release. A piece of plastic, glass or ceramic tile makes a good work surface.
The most obvious way to use OneFire Sterling PMC is to form it while it is most malleable. Fresh from the package, the clay is ready to use and can be rolled to make sheets of whatever thickness you need. Press the so clay against textures for dynamic eects. So clay can be rolled into rods and tapers, curled, twisted, and joined. To combine parts, sweep a damp brush across the joint several times. For larger joints, make a paste by adding water to OneFire Sterling PMC. Mix small bits of dry clay or the dust created by sanding. Spread this slip onto the joint and allow it to dry. Use several coats if needed.
OneFire Sterling PMC can be worked in its dry, unred state. e typical approach is to do some forming while the clay is so, then allow it to dry so it can be handled easily. At this point, edges can be sanded smooth, holes can be drilled, textures deepened and parts added. OneFire Sterling PMCis especially good for carving. Use knives, gravers, or miniature gouges to incise designs. e clay carves easily, but if you make a mistake, simply press fresh clay into the groove, allow it to dry, then carve it again. To join dry parts, dampen them slightly, brush on a small amount of slip and press the parts together. e slip acts like mortar between bricks and makes a smooth joint when dry.
Allow work to dry completely before ring by leaving it exposed to air, placing in a warm spot or using a dehydrator. Set pieces on a ring shelf, or for pieces of irregular shape, on refractory wool or vermiculite. Heat at full ramp, ideally toward the back of the kiln where the heat is uniform.
If OneFire Sterling PMC dries out, or if you decide before ring that you want to start over, grind the clay into small pieces (a coee mill reserved for this works well) and gradually add clean water. Roll the sti clay as thin as possible to force the water into the clay. Repeat, adding water sparingly as needed until the clay is ready to use.
Artists with advanced metalsmithing skills will nd that this material works well with all traditional techniques. It can be soldered with any grade of silver solder. It also invites enameling, keum-boo, stoneseing, and plating. Simply put, there is no technique in the metalsmiths arsenal that cannot be done on OneFire Sterling PMC.
Health and Safety
Like all other forms of PMC, OneFire Sterling PMC contains no toxic chemicals. It has been extensively tested to insure that there are no harmful ingredients. ough rare, it is possible for some individuals to experience skin rash or itchiness aer contact. If you have a reaction, discontinue use and see a physician. Wash hands aer use, do not ingest, and keep out of the reach of children. Take care to avoid burns.
The legal definition of sterling is a silver alloy containing at least 925 parts per thousand silver. The addition of more silver creates a sterling alloy that can be red without the need for activated carbon.