Meet the newest generation of PMC on the market PMC™ PRO. It is the strongest and most dense silver clay on the market. It’s perfect for anything that requires more strength like rings and bracelet components. Its bending strength is 5x that of PMC3 and is more resistant to scratching as well.

  • Composition: 90% silver and 10% copper, 0.900 fine silver
  • Melting point = 1450°F (790°C)
  • Shrinkage: 15-20%
  • Color: gray-toned silver

Working Properties

Very similar to PMC Original in that it can be modeled easily, takes texture beautifully, drapes extremely well, and can be carved easily. Because it is stronger in it’s greenware state, you can carve and sand without the fragility of some of the other clays.

Do not mix with other clays in their clay form. However, if you have a piece made from PMC+ or PMC3 and want to attach them together or fire them as one piece with PMC PRO, fire the piece first at 1000°F for 30 minutes on an open shelf firing. This will sinter the PMC+ or PMC3. Then do a second firing in carbon at 1400°F for 30 minutes to sinter the PMC™ PRO.


You will need the same tools that you use for PMC or Art Clay, just be sure to clean them between using different types of clay. Keep dedicated sanding tools for just PMC™ PRO.


PMC™ PRO must be fired in a kiln in carbon at 1400°F (760°C) for 1 hour. 1/2” of coconut carbon should be placed around each piece in a firing container, such as stainless steel. The lid should be propped, a hole drilled, or a place a piece of 1/8” fiber paper cut to fit inside the container for the lid. Do not use too much carbon as this reduces the temperature. If you are firing a large load or large pieces, fire for 2 hours.

You may wish to opt for an open shelf firing (similar to COPPRclay and BRONZclay firings) at 1400°F (760°C) for 30 minutes and then do a second firing in the carbon. If you find that your pieces are not sintering you may wish to try this method to insure firing temperature.


Use traditional methods for finishing metal clay (tumbler, polishing lathe, magnetic polisher, rotary tool, or by hand). You may also patina PMC PRO as you would the other PMC or Art Clay versions.

Other techniques

Treat PMC™ PRO as sterling silver when enameling or applying gold such as Keum Boo. You will want to raise the fine silver skin first or depletion gild. For soldering, you will only want to use Easy or Medium Solder.

Quick Comparison

Comparison of PMC Metal Clays

PMC Products Firing Chart

Explanation of Terms

The first three clays are 100% silver. PMC PRO contains 90% silver with the balance being a proprietary alloy. Sterling contains 92½% silver, balance typically copper.
Metal Content
The nonmetal content refers to water and binder.
In all clays, shrinkage occurs equally along the x-, y-, and z axes unless the clay is constrained or restricted. The degree of shrinkage is related to the amount of binder.
Recommended Firing
Some clays offer options that balance a lower temperature against a longer soaking time. See other charts for the relative merits of the other schedules. Always fire at the highest temperature and longest time possible.
This refers to the degree a sample can be stretched before it breaks. Relevance: A ring with a higher number can be sized by stretching.
Tensile Strength
Related to elongation, this measurement shows how much force is needed to break a sample. A higher number means the piece will be harder to break.
Bending Strength
This is a measure of how much force is needed to bend a sample. The higher the number, the more rigid the piece will be. Relevance: A ring with a high number will not bend out of shape when worn.
Surface Hardness (Vickers)
This refers to a test that measures what happens when a point of specific size is pressed into a sample. Relevance: A high number here means the surface is hard; textures and details will not wear away quickly.
We can think of this as a measure of how tightly packed the crystals are. Generally the tighter the structure, the tougher the metal. In objects of a given size, a denser material will weigh more.
Can I make slip?
Yes, just like other metal clays. Add water to scraps and sanding dust or smear water into fresh PMC™ PRO.
Can I mix PMC™ PRO with other PMCs?
The materials can be used side by side but they cannot be mixed together into a single hybrid clay. Similarly, scraps of PMC™ PRO should be kept separate from your other PMC.
Can I enamel and use Aura 22?
Yes on both counts. Fire the PMC™ PRO as recommended, then apply enamel or Aura in the usual way.
Can I solder on PMC™ PRO?
You can use any low-temp solder and easy or medium silver solder. Do not use hard solder because its melting point is close to the melting point of PMC™ PRO.
PMC062  PMC™ PRO 50g *C*

Stock Status: Out of Stock
Price: $130.11  $93.00