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COPPRClay Kit, Charcoal, Vessel & Clay

1.75 Lbs.

COPPRClay Kit Small Kit

Everything you need to get started (except the kiln) You can use any kiln that can be programmed or you need a pyrometer. This is the smallest kit, only what you need to get going!, contains the small vessel, enough coconut charcoal for 50+ firings and 100 grams of COPPRclay. 

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  • INFO
  • COPPRclay guide.

    Welcome to COPPRclay™!

    COPPRclay™ is easily sculpted, molded, carved and formed,

    and becomes solid copper when fired. Your imagination and

    just a few simple tools will allow you to create solid copper

    pieces, from jewelry to sculptures! And because COPPRclay

    is pure copper, it’s great for those artists who enjoy applying

    enamels (note the required firing requirements on back).

    Working with COPPRclay™

    COPPRclay™ is just that: a clay. Like clay, it’s highly workable

    but it also dries quickly. You’ll notice the clay stiffening and

    cracking when it begins to dry. Some tips to keep in mind:

    • Keep COPPRclay™ refrigerated until you’re ready to use

    it and in between sessions.

    • Rub a dab of olive oil on your hands before you begin

    working with the clay.

    • While working the clay, refresh it periodically with a

    small amount of water using a spray bottle or brush.

    • Wrap pieces that you are not currently working on

    in plastic and place to the side.

    • Avoid using tools that absorb water.

    • When not in use, keep the clay tightly wrapped in plastic

    and place the wrapped piece in a sealed plastic bag for

    added protection. Store all unopened packages (as well

    as opened packages) of COPPRclay™ in a refrigerator

    when not in use.

    Making Slip

    Slip will quickly become one of your favorite tools for

    working with COPPRclay™, and it’s easy to make. Simply mix

    tiny pieces of clay (filings, small dried or wet pieces, etc.) with

    water (we recommend distilled water for a longer shelf-life)

    until you reach a toothpaste consistency. Keep your slip

    stored in a sealed container. Note: Slip will last for about

    one week, so make only enough for your immediate need.

    Drying the Clay

    Once you’ve finished your piece, you will need to dry the clay

    before firing it. Gently place the piece on a warming surface

    such as a coffee mug warmer or on the top of a kiln (be

    careful to keep pieces away from the kiln’s vents); an

    inexpensive vegetable dehydrator works well, too. Once

    dry, you’ll notice the clay is leather hard, making it very

    easy to add finishing touches such as filing, drilling, sanding

    and carving. Once COPPRclay is fired, it’s much more difficult

    to finish, so take advantage of this pre-fired stage to do as

    much of your detailed finishing work as possible.


    To reduce oxidation, the piece(s) must be embedded in

    coconut shell–based activated carbon (Rio #703-205)

    during firing. Important: Some coal-based carbons may

    not fire COPPRclay properly; we recommend using coconut

    shell–based activated carbon.

    Firing COPPRclay™ is a two-step process that uses low

    heat to vaporize the binder, then high heat to sinter the alloy.

    1) Spread 1" of coconut shell–based activated carbon

    granules on the bottom of a stainless steel firing

    container .

    2) Place the piece on top of the layer; if firing two or more

    pieces, leave at least 1/2" between pieces, more if the

    pieces are large.

    3) Pour more activated carbon granules on top of the pieces

    until the container is filled 1" from the top, making sure 

    there is a 1/2" layer of granules on top of the pieces.

    Again, if you are firing many pieces in layers, make sure

    there is at least 1/2" of space between the vertical layers

    as well. Note: Do not fire more than 100 grams of clay at

    once; overloading may cause poor sintering.

    4) Put the stainless steel lid on the firing container and

    place it in the kiln on stilts to allow good heat circulation.

    Note: Front-loading kilns are cooler in the front near the

    door, so the front of your firing container will be cooler

    than the other sides. Compensate for this by placing the

    pieces closer to the sides and back of the firing container,

    making sure you leave at least 1" of space between the

    pieces and the front of the firing pan. If you have a

    top-loading kiln, there’s no need to adjust.

    For COPPRclay™ pieces that will not be enamelled:

    Regardless of thickness (embedded in coconut shell–based

    activated carbon): Ramp at full speed to 1700°F–1800°F

    (927°C–982°C) and hold for 3 hours (total firing time,

    including ramp-time, will be about 4 hours). Most firings

    perform well at 1700°F. However, if you discover that your

    pieces are not sintering properly, try firing them at 1800°F.

    Please Note: Blistering may occur at 1800°F; if this occurs,

    slightly decrease the firing temperature.

    For COPPRclay™ pieces that will be enamelled:

    Follow the two-phase firing schedule below if you plan

    to enamel your piece.

    Phase 1 (open-shelf fire)

    For pieces 3mm thick or less: Place the piece directly on the

    firing shelf. Ramp at 500°F/hour (278°C/hour) then hold at

    560°F (293°C) for 15 minutes.

    For pieces thicker than 3mm: Place the piece directly on

    the firing shelf. Ramp at 200°F/hour (93°C/hour) then hold

    at 560°F (293°C) for 15 minutes.

    Phase 2 (sintering)

    Regardless of thickness: Embed the piece in coconut

    shell–based activated carbon inside a firing pan. Ramp

    at full speed to 1750°F (954°C) and hold for 31/2 hours.

    Allow the piece to cool naturally inside the kiln.


    Once fired, the COPPRclay™ piece is a solid piece of

    metal. As with other metals, it can be sawn, drilled,

    sanded, patinaed or soldered using traditional jewelry

    tools and materials.  Keep in mind that many

    finishing techniques will be easier to perform at

    the dried, pre-fired stage.


    The binder in COPPRclay™ is non-toxic, and no toxic fumes

    will be present during firing. Though rare, it is possible for

    some individuals to experience

    some sensitivity to COPPRclay™.

    We recommend wearing a dust

    mask while working with the

    activated carbon.