Process of Making Glasses
To make clear glass, the right raw materials are required, including silica sand, sodium oxide, calcium oxide, dolomite, and feldspar. The ingredients are mixed, flown into a furnace heated to 1500 degrees Celsius, and then the molten material flows into a float bath of molten tin. The glass undergoes annealing, inspecting, and cutting.
For prescription sunglasses, the lenses undergo the same process with a UV protective coating or tint applied by dipping into a liquid bath. Gradient tints can create a transition from darker to lighter. Both lenses are dipped together for consistency.
Sunglass Lens Materials
There are two primary sunglass lens materials: glass and polycarbonate. Polycarbonate is lightweight, impact-resistant, and optically clear, while glass provides a different set of characteristics. Acrylic is also an option, suitable for casual sunglasses.
Quality Check and Shaping
Through inspection technology, defects are identified, and diamond cutting tools are used to trim the glass into shapes. At Banton Frameworks, high quality materials and handmade processes ensure attention to detail. Technical specialists inspect frame strength, stability, and density.