As an example, we will explain the process by making a
custom-designed ring.
1.
Kneading and forming
Remove the clay from the bag, knead
it quickly, and form it. Because we will make a ring, roll a lump of PMC on an
acrylic sheet or other flat surface to form a wire. Note: Clay dries in a
matter of minutes, so determine the shape beforehand. Once you unpack the clay,
work it very quickly. Try not to repeat processes 1 and 2. If you want to add
delicate modifications to the piece, do so after drying.
2.
Rolling out
Adjust the length of the paper tape
to the circumference of your finger and wrap it around a mandrel. Roll out the
wire-shaped clay onto the covered mandrel to make a hollow shape. Overlap both
ends, wet the joint, and lightly press together. Note: Take shrinkage when
firing into consideration and make the piece larger. It will help to wrap a
measured paper tape around the cylindrical core before kneading the clay.
3.
Drying
Use a hair dryer and thoroughly dry
the ring around the mandrel (for approximately 30 minutes). Note: Dry it
completely, as it affects the strength of the completed project.
4.
Drawing the design
After confirming the perfect dry
condition of the PMC, draw your design on the ring with a pen.
5.
Carving
Carve the design using files,
cutter knives, chisels, etc. Note: Because the clay before firing is delicate,
handle with care to avoid damage.
6.
End of modeling
When satisfied with the shape, the
modeling process is finished. The key to a perfect finish is to smooth the
surface with fine sandpaper or abrasive sponge.
7.
Firing
Regardless of thickness (embedded
in coconut shell–based activated carbon or Magic 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. Note: Blistering may occur at 1800°F; if this occurs,
slightly decrease the firing temperature. Skrinkage approximately 20%
8. Brushing
After the firing process, wait
until the work cools and then brush the piece. The ring will be dull when first removed
from the kiln, luster will be added by brushing.
9.
Polishing
Use finer and finer sandpaper.
Last, polish to a mirror-smooth state using a polishing cloth. Note: Stop
polishing in the middle to obtain a satin finish or have both mirror and satin-finished surfaces for variety.
10.
Completion
Sulfidize the work as an accent.
When you are satisfied with the results, you are finished