What is PMC 3 (Precious Metal Clay 3)
by: Adam Hunter
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Precious metal clay can be modelled and sculpted like normal clay, allowing it to be hand shaped, cut, pressed, moulded and stamped. Alternatively, it can be left to dry and then later carved into. Precious metal clay is always best used straight out of the pack, and it is recommended that the pack is equal to the size of your project. Until its fired precious metal clay can be re-constituted, no matter how dry it has become, by simply adding a few drops of water and leaving it to stand for a few hours.
Once fired in a kiln the non toxic binder burns away and the water evaporates. It can also be fired by a butane hand torch. Firing in a kiln gives greater control, as it allows multiple pieces to be fired in a controlled environment. If a butane torch is used it is less costly and more suited to smaller items. Once heated the particles fuse together and form a solid dense metal, and PMC3 only shrinks around 6% of its original size. Once fired silver PMC becomes fine i.e. 99.9% pure - and can be hallmarked as fine silver.
Firing leaves the finished piece in its original state, giving the jeweller a choice of type of finish. This means that the metal does not have to have a high shine usually associated with precious metals, but can be finished to give a matt or semi-matt appearance simply by barreling or using a stainless steel brush. The same process & effects can be achieved with both the silver or 22ct gold PMC.
If care is taken whilst working to lay down plastic or paper over the working area, this will catch any left overs, then these scraps of precious metal clay can then be reused. It is important to try to use rubber tools, like shapers because whatever precious metal dries on the tip will fall off when the rubber is flexed.
Typically PMC is used by jewellery makers to create pieces with fine detail – pendants, earrings, brooches and rings. It also increasingly used to add decorative touches onto other precious metal pieces. With the advent of 22ct PMC designers are now combining clays of different metals like gold and silver, to produce stunning two tone effects.
As experience grows, jewellery makers will be able to discover how simple, yet how adaptable precious metal clay is, and learn to love the creativity and flexibility of this unique product.
Article Source: http://www.ArticleStreet.com/profile/adam-hunter-2945.html
About the Author
Adam Hunter – E-commerce Marketing Manager of www.cooksongold.com. Cookson Precious Metals offer a choice of supplies from over 10,000 products including jewellery tools, findings, precious metal clay, wire and metal sheet - gold, silver, platinum and palladium plus technical information for jewellers, jobbers, design, craftsmen and students.
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