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Glasses Melting and Pressing Process

Melting

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Mixed raw material called "batch" is put into a platinum lined pot and melted into amorphous glass.

Amorphous glass is stirred to insure good homogeneity.

After casting, the glass is cooled and crushed. Then the refractive indices are measured for process control. The crushed glass is called "Cullet".

The cullet material shown above is melted again to achieve consistent optical values and properties.