A bending mold particularly adapted for use in a press bending apparatus. The mold disclosed herein is formed of a substantially solid block of a castable ceramic material such as vitreous silica in an hydraulic binder which has a coefficient of thermal expansion no greater than 0.45x10-6 at 1,800 DEG F. and a compressive strength of at least 3,000 lbs. per sq. in. at 2,000 DEG F.
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