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About Bronze Clay

Bronze clay is a non-toxic metal clay product used by jewelry artists and craftspeople to create one-of-a kind and small run jewelry, models, prototypes, sculpture and decorative items.
Just about anything you can image can be sculpted, formed or molded using the moist clay. Bronze is a very strong metal and makes a wonderful medium for jewelry.

Bronze is an alloy, which is a word used to describe metals that have been mixed together to form a new metal. By adding a ratio of 10% tin to 90% copper, we have bronze. The amount of tin added affects the properties of the alloy. There are special bronze alloys that are used for many surprising things, such as a special alloy just for making bells. Too much tin in the recipe and there's no ring to it!

We offer 3 types of bronze clay, BRONZclay, and FastFire BRONZclay by Metal Clay Adventures, and powdered Bronze clay by Hadar Jacobson. BRONZclay (also called Original BRONZclay), must be fired according to the thickness of the piece and can take up to 9 hours for sintering for really large, thick items. FastFire BRONZclay is a formulation that fires in only 2 hours for most pieces. Objects are fired in a table top kiln to transform them from clay into a solid bronze metal. Gemstones and other items can be embedded in the wet clay and fired together.

The same tools and textures used with silver clays are also perfect for working with bronze clays. If you are working in other metal clays, such as silver, you'll need a separate set of "dusty" tools for bronze to avoid cross-contamination. Unfired dust and bits of bronze clay must be kept away from other metal clays to avoid contamination and discoloration that cannot be removed. Rolling tools, worksurfaces, textures and other tools used while the clay is wet can be cleaned off and used for any clays you work with. But you need to dedicate a set of files and sanding tools just for bronze. Brushing the dust off the tools is not good enough. The tools must not mingle. The rule is easy: if the tool creates dust or if dust builds up on it, keep a separate set for each type of metal.

Because bronze contains copper, the clay must be protected in a bed of carbon firing media inside a stainless steel pan when fired. The activated carbon keeps oxygen away from the piece being fired, and, in turn, keeps the product from oxidizing and turning the bronze black. The media used is important, since some types of carbon do not allow sintering of the metal particles. We recommend Coal carbon or Magic carbon for a beautiful antique patina, or Coconut carbon for a clean satin finish. In addition to carbon, BRONZclay requires a digitally controlled kiln to properly sinter the clay into a solid, dense metal form.