| 摘要 |
Process consisting of a preliminary preparation of two circular pieces, one of which is decorated by means of the precipitation of fluxes and oxides of cobalt, copper in all its tones, and magnesium, the other piece being placed over the decorated one and, once connected, they are placed in a mould which is placed in an oven, being subjected to a temperature of 750 degree C. Once cooled, it is spread (planned), via its part of largest diameter, over a mirror, which acts as support, and in its part of smaller diameter, which forms the cone, a bevelling is carried out. <IMAGE>
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