Difference between ordinary glass and float glass
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A: Both ordinary flat glass and float glass are flat glass. It's just different in production technology and quality. Ordinary flat glass is made of quartz sandstone powder, silica sand, potassium fossil, soda, mirabilite and other raw materials in a certain proportion. It is melted at high temperature in a furnace. It is transparent and colorless flat glass produced by vertical pull-up method, flat pull method and calendering method. Ordinary flat glass can be divided into three categories according to its appearance quality: special selection, first-class products and second-class products. According to thickness, it can be divided into five types: 2, 3, 4, 5 and 6 mm.
B: Floating glass is made of sea sand, quartz sandstone powder, soda, dolomite and other raw materials in a certain proportion. It is melted at high temperature in a melting furnace. The liquid glass flows continuously from the kiln to the metal surface and floats on it. It is spread into a glass belt with uniform thickness and polished by fire. After cooling and hardening, it is separated from the liquid metal and then cut by annealing. Transparent colorless flat glass. The surface of glass is very smooth, the thickness is very uniform, and the optical distortion is very small. Float glass can be classified into three categories according to its appearance quality: first-class product and qualified product. According to the thickness, it can be divided into seven types: 3, 4, 5, 6, 8, 10 and 12 mm.
C: The appearance quality grade of ordinary flat glass is determined by the number of defects such as ribs, bubbles, scratches, sand grains, knots, lines and so on. The appearance quality grade of float glass is determined by the number of defects such as optical deformation, bubbles, inclusions, scratches, lines and fog spots.
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