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The largest manufactures of glass-ceramics in the last decades are related to the luxurious Japanese tiling material “Neoparies" and its replicas, developed in China. These marble-like materials are produced by sintering and surface crystallization of glass grains (frit) with original composition, placed in large refractory moulds (up to 1-2 m2) and the subsequent grinding and polishing of final panels in use. Since these products are manufactured in high volumes, the technology seems to be very appropriate for sy...