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Learning Center - Resources, inspiration and expert advice on metal clay and jewelry making in silver, gold and bronze
PMC Fine Silver Clay Products

PMC fine silver clay is available in 3 versions, each with a different minimum firing temperature. The 3 versions, PMC3, PMC+ and PMC Flex represent innovations in manufacturing that allows for lower firing temperatures and shorter firing times. All of the PMC fine silver products are listed below.

The Basic Forms: Lump, Slip & Paper
Basic Metal Clay Tools
Lump Form

The basic metal clay material is called "lump" form. It comes in a sealed foil packet and is ready to use. Lump form is used to roll slabs, snakes and to mold or sculpt objects. Lump form can be thinned with water and used as a paste.

Slip (or Paste) Form
Slip (or Paste) Form

Slip, also called Paste form, comes in a jar or loaded in a syringe. The paste form is fairly thin and is used like glue to paste wet or dry PMC objects in place, as a media for slip casting, for painting onto an object for a hollow form, and decoration. The syringe form is much stiffer than slip or paste. Metal clay syringe is used to extrude a thinner form of clay for decorating, setting stones, filling cracks, etc.

Paper Form
Paper Form

Paper form is a very thin sheet of clay that can be used to make bezels for objects to be set before or after firing, used for ring shanks, and folded like origami. Shapes can be cut out with punches and applied as decoration. It can also be laminated with water to make it thicker.

PMC FIne Silver Clay Product Line
Lump Form - PMC Flex
PMC Flex

PMC Flex is the newest innovation in fine silver clay. It has been specifically formulated to provide the jewelry artist with an extended working time. Unlike other fine silver clays, PMC Flex does not completely harden at room temperature. This benefit makes it possible to create components for later projects or even resume working on pieces several days after starting them. Carving, sanding and refining PMC Flex can easily be done after drying the clay at 300F for 20 minutes. PMC Flex shrinks about 10-12% during firing. It can be fired in open air (no carbon required) and can be torch fired as well.

Uses This form provides extended working time. Unlike the other versions of PMC, Flex does not completely harden at room temperature. PMC Flex can be used to make rods and sheets for later use and to return to projects several days after. When you are ready to sand or carve PMC Flex, dry the object by heating to 300F for about 20 minutes. Firing and finishing is the same as for all other fine silver clays.
Workability PMC Flex does not completely harden at room temperature. Unused clay should be kept tightly sealed when not in use.
Embedded
Objects
Any object that can withstand the firing temperatures and times of PMC Flex can be embedded and fired in place. Some natural gemstones, lab gems and Cubic Zirconia's can be used, as well as porcelain.
Firing
Options
Temperature Hold Time
Kiln 1650F
1290F
1200
1110F
2 hours
10 min
20 min
45min
Torch Red Glow 5 min
Lump Form - PMC+
PMC+

This product is 85% fine silver and 15% binder by weight. This variety shrinks 12-15% during firing. Note the firing times can be shortened dramatically from 2 hours to a minimum of 10 minutes.

Uses This version can be used to craft any type of item, but we caution it's use for rings since it is not as strong as alloy type clays such as PMC Pro or PMC Sterling. If soldered, it must be burnished well and uses surprisingly more solder than sterling silver.
Workability PMC+ dries quickly, so care must be taken to quickly remove and save scraps. Unused clay should be kept tightly sealed when not in use.
Embedded
Objects
Any object that can withstand the firing temperatures and times of PMC+ can be embedded and fired in place. Some natural gemstones, lab gems and cubic zirconia's can be used, as well as porcelain.
Firing
Options
Temperature Hold Time
Kiln 1650F
1650F
1560F
1470F
2 hours (optimum)
10 min
20 min
30 min
Torch Red Glow 5 min
Lump Form - PMC 3
PMC 3

This product is 90% fine silver and 10% binder by weight. This variety shrinks 10-12% during firing. The metal particles in this version are smaller than those in PMC+, which allows higher metal content and therefore less shrinkage. The firing duration can be as little as 2 minutes (torch fire).

Uses This version of metal clay can be used to craft any type of item, although it being .999 fine silver, we do not recommend it for rings, findings or other items that require high strength, such as alloyed clays like PMC Sterling or PMC PRO. When fired at the highest temperature (1650F), it produces the strongest final product. It must be burnished well before soldering and uses surprisingly more solder than sheet or wire forms of sterling silver.
Workability PMC3 dries quickly, so care must be taken to quickly remove and save scraps. Unused clay should be kept tightly sealed so that no air can contact it.
Embedded
Objects
Any object that can withstand the firing temperatures and times of PMC3 can be embedded and fired in place. Some natural gemstones, lab gems and cubic zirconia's can be used, as well as dichroic glass and porcelain. Findings and some types of glass can also be embedded when fired at the lowest temperature.
Firing
Options
Temperature Hold Time
Kiln 1650F
1650F
1560F
1470F
1290F
1200F
1110F
2 hours (optimum)
10 min
10 min
10 min
10 min
20 min
45 min
Torch Red Glow 2 min
Lump Form - Metal Magic
Metal Magic

This product is 75% fine silver and 25% binder by weight, and after firing, becomes .999 fine silver. This variety shrinks 25% during firing, which enhances its abilities to pick up the smallest of details in your creations. This clay has a great (long) working time and does not dry out too quickly. Great for pendants, beads, earrings etc., we do not recommend this metal clay for rings due to its high shrinkage rate.

Uses This form of silver metal clay can be used to craft any type of item, although we recommend against using it for ring making, due to its 25% high rate of shrinkage.
Workability Metal Magic Silver Clay dries slowly, offering the artist a longer work time before it begins to dry. Clay may seem hard in the packaging before use. Lubricate hands with a non-stick product like Claymate or Slik and work the ball of clay for a few minutes in a rolling motion. It will turn soft and pliable. Do not add water unless you are making slip. To keep the clay moist and usable, return the unused clay to its original packaging or store in a Clay Hydrator. Dry clay overnight before firing, or dry on a hot plate or dehydrator at a maximum temperature of 175F for 30 minutes. Drying temperatures above 175F will begin to burn off the binding agents, with possible distortion to your piece. After firing, conventional jewelry tools can be used to finish your piece by burnishing, tumbling or applying a patina and polish.
Embedded
Objects
Any object, i.e. Cubic Zirconia, lab created gemstones, findings, etc., can be fired in place as long as they can withstand the kiln firing temperature of 1600F for 30 to 90 minutes. See our Gemstones Firing Guide for more information on firing gemstones in metal clay.
Firing
Options
Temperature Hold Time
Kiln 1600 30-90 min
we recommend the longest hold time (90 min) for a complete sintering, and the strongest end result.
Torch Not recommended

PMC Silver Clay Products