What are the “float” and “microfloat” processes?
The float process, which was developed and first used in practice in the 1950s, revolutionized the world of glass at the time. In the float process molten glass flows continuously from the melting tank on a bath of liquid tin. There it spreads out uniformly and then undergoes mechanical treatment to produce the required thickness. When it reaches the end of the tin bath, the glass, which has now “solidified”, is removed from the surface of the metal and then annealed to relieve any internal stress. After it leaves the annealing oven the glass ribbon is cut into the required sheet sizes by an automatic cutting device. In 1993 SCHOTT constructed the world’s first Microfloat facility for the production of BOROFLOAT® 33 in Jena (Germany). Difference between Microfloat Process and Float Process The difference between microfloating and floating is mainly the size of the plant. Conventional float plants have a glass throughput of up to 1,000 tons per day. They are used almost exclusively for
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