Prometheus® White Bronze Clay
Prometheus® White Bronze (PWB®) is a claylike material which turns into pure solid bronze, similar to
silver colour, when fired in a kiln. It is a mixture of micron sized bronze
powder, water and organic binder. It can be formed by hand, rolled into a sheet
or a rope. It can be molded, textured, even turned on a potter's wheel. PWB®
can be fired with most lab-created gemstones (cubic zirconias), pre-tested
natural stones, glass beads, ceramic, porcelain and PROMETHEUS® METAL CLAYS.
When the clay is fired in a kiln, the organic binder evaporates and burns away
and you’re left with pure, solid white bronze.
You can create unique jewellery, ornaments, hollow ware, statues, sculptures
and many other decorative objects. Anything you create with PWB® is
a piece of art. You can perform multi-color pieces by combining PWB® with other PROMETHEUS® METAL CLAYS.
Combine it with
your imagination and let your fingers do the rest!
Working with PWB®
| It is similar to working with Prometheus® Metal
Clays (Silver, Copper & Bronzes), polymer clays, modelling dough,
flower dough and ceramic clays. It is very easy to use. At normal
consistency, PWB® does not stick to hands, working surfaces,
instruments or molds without need of any lubricating oils. However, oiling
your fingers and the working surface lightly is useful and would not harm
your clay. Olive oil is preferable. Remove the clay from its plastic bag and place it on
a clean plastic surface or wax paper. Use your fingers, roller, spatulas,
clay shapers, craft knives, tooth picks and other simple tools to shape it,
texture it, or turn it on a potter’s wheel. You can texture the clay with
rubber stamps, texture mats, leaves, paper, and other interesting textures. When you take the clay out of the package, “The Wet Stage” begins. Try not to
work at this stage for too long in order to avoid your clay from drying out
but don’t rush your work, PWB® gives you enough time to play
with. However, if you detect any cracks on the surface, apply some water
straight away with a brush or spray, and fill the cracks with a little paste*
to repair them. *To make
paste, mix a little clay with a little water until it is the consistency of
thick yoghurt. To join two pieces together, simply apply some water
to the points that will touch, or add a little paste. If the two pieces are
dry, wet the touching points well and apply some paste to create a secure
bond. Store any unused clay in a plastic bag with a zipper
to prevent it from drying out. Place any offcuts in the bag straight away
whilst you’re working, and keep it closed. If you’re not planning to work
with the clay for a while, put the sealed plastic bag in a jar with a tight
lid. Placing a wet sponge to the bottom of the jar will keep your clay at a
good condition, until your next usage. If you are storing it for a long time,
keep an eye on the sponge and add water if needed.
Before firing the PWB®, you need to dry your
piece completely. A hair dryer or putting it on top of a kiln will do it
well. Hot-plates or food dehydrators work well too. To check if the clay is completely dried, put the
hot clay (straight from drying) on a cold mirror. After a few seconds, move
it and check that there is no condensation on the mirror. This test is
especially important for big and thick pieces. If the piece is not dried
completely, then it can crack, break or have bubbles on the surface while
firing. We don’t recommend fast drying for large and/or
massive pieces (statues etc.). For these, it is recommended to leave them in
room temperature for some time, and then continue drying at moderate
temperatures, in order to avoid any cracks.
*Draw your
design with a pencil, wet the lines with a brush and make your carving with
any instrument even a toothpick. After completing your design, it is easy to sand
uneven surfaces, using sand papers, and sanding sponges. It is a lot easier
to do this step now - before you have fired the clay! |
Firing PWB®
Before firing your works, test your kiln’s accuracy by
firing a small piece of clay. Electric kilns may show slight deviations, due to
their temperature control systems and isolations. According to your test
result, you may change the firing temperature by 5% (up or down) until you
reach to the correct sintering.
Firing PWB is a 2-step-method.
Step.1 Place the dried pieces on a stainless steel mesh and put it
into a cold kiln, let it raise to 500°C/932°F and fire for 15 minutes. Take it out
on to a fireproof surface and let it cool down.
Step.2 Put approximately 3 cm. of activated carbon to the bottom of a
steel container. Place the pieces with at least 1.5 cm space between each other
and fill the container with activated carbon, close it and put it into the preheated
kiln to 770°C / 1420°F. Let the kiln raise to the
target temperature again and fire it for 2 hours.
When the firing is completed, either leave it to cool down in the kiln or,
carefully take it out and leave it on a heat isolated surface until it is cold
enough to take your pieces out.
You can combine different Prometheus® Base
Metal Clays in one piece and fire them together. When firing use the 2 Step
Carbon Firing Method. To determine the second step firing temperature, refer to
the firing instructions of the clay which requires the minimum firing
temperature within your combination. Fire at least 2 hours.
The shrinkage rates are; PCC® 9-10%, PBC® 12-13%, PSB® 12-13%, PSW® 15-16%, PGY® 13-14%, PLY® 17-19% and PWB® 10-11%.
Annealing
If your pieces are thin
and long than we recommend you to anneal your pieces in order to
maintain high strength and malleability.
For the annealing process, put
your pieces in a pre-heated kiln to 565°C (1050°F), wait for 5 minutes and take them out and quench
in water.
Finishing PWB®
Polish the piece with a burnisher, polishing papers, a tumbler or polishing
motor. Using polishing compounds can give extra shine to your works.
Safety Precautions
1. PWB® contains organic binder, water and bronze powder. It is non-toxic and does not contain any harmful chemicals. There have
been no reports of allergic reactions; however, people with allergies should of
course be cautious and use the product with care.
2. While firing, individuals with lung or
respiratory problems may be affected by the smoke created. Fire in a well-ventilated
place or under a kitchen extractor fan. Firing large pieces, like sculptures,
is best done in a furnace with a smoke extractor.
3. Wear gloves and safety glasses, use tongs,
paddle when loading and unloading a kiln.
4. Put your hot
pieces and tools on heat proof surfaces.
The information in
this Instruction Guide is maintained as results of careful tests. However, no warranty is expressed or implied
regarding the accuracy of the data. Since the use of this product is not within
the control of Odak Arts, Hobby and Crafts Ltd., it is the user’s obligation to
determine the suitability of the product for its intended application,
techniques and procedures. The consumer takes responsibility for all risks and
liability for its safe use.