Processing of Murano Glass By Riccardo Rossi

Venetian glass is sodic, as in the ancient Mediterranean tradition. This means that the silica, which is a sand destined to become glass through fusion, is added to the soda ash is added in order to allow the fusion at lower temperatures. The potash, alternative to soda, typical of the Nordic countries, creates a brilliant glass suitable for grinding and incision (such as the english lead glass), but not to the complex, typically venetian, workings Mixing of raw materials takes place in the evening, at the end of working hours, and preparation of material lasts throughout the night: to the two basic raw materials are added the stabilizer (such as calcium carbonate), the bleachings or colorings, and, if necessary, the opacifiers. The reverberation chamber melts the raw materials at a temperature of about 1400 degrees and glassmakers in the morning find the the molten material, ready for modeling. The molten glass is flexible up to a temperature of 500 degrees.

The working group is the "square", made up of serving and boys, which is coordinated by Master. The work can be also cold-finished by expert grinders performing sanding or other finishes; the incision is made in figurative independent laboratories, where highly skilled decorators works. If the forseen decoration is the enamel, the object moves in a laboratory in which are made the painting and the annealing of the enamel.

Blown glass
The invention of glass-blowing is dated in the first century BC on the eastern coast of the Mediterranean and remains the most important event of the whole history of glassmaking. Especially in Venice, the glass-blowing was the preferred technique for high level glass works.

The Murano masters have developed, from the Middle Ages, an extraordinary skill in hot modeling, inventing new techniques and coming to propose shapes of major elegance and refinement.

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