Precious Metal Clay molds

July 19, 2022
PMC Silver Art Clay Jewelry

Carl Stanlet Lecturing

To be honest I was not that interested in Precious Metal Clay before I saw this demonstration. It was very informative and I can see a lot of unique applications for it (now)…

Precious Metal Clay is just what it sounds like. It is fine silver (or gold) ground extremely small and suspended in a binder to create a clay. Just like you played with as a kid.

Once the clay (PMC) is molded and shaped it is fired in a casting oven or depending on the type of clay it can be fired with a torch.

One of the major advantages of this material is that it’s really simple to work with and fast, it has very little learning curve for a beginner. Precious clay does not require the skills of traditional jewelry making, there is no soldering, or forging.

Precious metal clay has another distinct advantage for a beginner, it can also be worked with in a very small space. No workshop is needed, just a small workspace on a bench or table. PMC does not need any of the traditional tools, with the exception of a burn out oven or torch. Classes are often taught at local clubs and schools… access to an oven is easy to get without buying one, just look around for a local class.

Clay being workedPMC comes in a plastic wrapped block just like any clay, although it is more money, about $22/oz. or so depending on quantity and supplier. The clay can be rolled, shaped, molded, glued together, stamped, extruded and about any thing else that you can think of to create objects or jewelry. Then set aside to dry out and harden up so it will keep it’s shape, then fired. Magic… silver/gold jewelry.

Left – As you can see in the picture to the left precious metal clay can be manipulated in almost an endless number of ways and techniques.

Notice the lavender pieces of plastic laying around. This is a plastic material that can be used as a mold or to make a texture stamp out of.

Left – The plastic molding material comes in sheets, clay (like) and liquid forms.

Basically is can be worked like the PMC itself to create molds, texture stamps, and forms.

Clay being workedWhen the mold material cures, it’s some what like linoleum or tire rubber. It will hold whatever shape you created with high detail, thus making a mold for the clay.

There is some shrinkage in both the precious metal clay (after firing) and also the molding material (after curing). The amount of shrinkage depends on the type of clay (or molding). Some materials do not shrink hardly at all and some a as much as 30% or so.

There are some distinct advantages that can be taken advantage of when the material shrinks. Pieces can be made smaller by molding, firing and remolding.

Left – For example say you want to make a smaller version of this cactus silver pin you have already created. You can do this without having to go to the labor of re-carving the pin all over again.

Create a mold of the original pin using the molding material.

Simply press the original pin in the soft molding material, creating a duplicate image.

Note: More detail can easily be added to the molding material while it is soft by cutting, scribing or indenting with various tools.

Left – Take some PMC and make a new pin from the mold of the original that you just made a mold from.

Fire the PMC and depending on the type of clay (and it’s shrinkage) you will have an exact duplicate of the original cactus pin.

Clay being worked Working clay Carl Stanlet holding the molding material Carl Stanlet holding the molding material

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Source: www.gemsociety.org
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