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Working process |
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1.
Preparation of the impression. |
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2.
Production of the negative forms made of plaster, gel or silicone.
Preheating of the forms. |
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3.
Remove the ear impression and isolate the plaster surface. |
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4.
Pouring of the mixed Otoacrylic into the moulds. In case shells have
to be cast resp. finishing time saved, the materials are partly poured
out of the mould again. |
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5.
Pressure polymerisation, e. g. in the Polymax. |
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6.
After polymerisation take the blank out of the form, work as usual,
polish or lacquer it. Special advantages are nowadays offered by the
silicone form method. These forms do not need to be treated with
an isolating agent, they do not shrink so that they do not need to be
poured immediately. |
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