Vello process
glassmaking
Quick Summary
The Vello process is a method used in glassmaking to produce glass tubing. In this process, molten glass is dropped through an annular space that surrounds a hollow, rotating pipe. The diameter of the resulting tubing is controlled by the pressure of air passed through the pipe, the speed at which the glass is drawn, and the temperature of the molten glass. This technique is a hybrid, combining elements of both the Danner process and the downdraw process.12
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