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Guoguang Optical Glass Co., Ltd., formerly Shanghai Non-ferrous Optical Glass Factory, integrates colored optical glass material melting and processing. With sales HQ in Shanghai and production bases in Nantong, it has two raw material melting workshops and one processing workshop. It provides optical glass blanks or finished products of different sizes and spectral data per customer requirements, developing formulas and melting processes to meet spectral specifications. With 179 product grades, main products include optical filters, selective filters (BG, GG), infrared filters (RG), UV glass, heat-insulating glass (KG), cut-off filters, neutral gray glass (NG), quartz glass, polarizers, colorless optical glass (B270), etc. Services include forming, cutting, grinding, polishing, coating. Equipment includes automatic precision grinders, wire cutters, large polishers, CNC mills.