The traditional plant in Grünenplan is SCHOTT’s competence center for ultra-thin glass. The experts here manufacture the glass under the most modern conditions, according to the customer’s requirements – with minimal deviations of a maximum of +/- 10 micrometers. Thanks to SCHOTT’s unique down-draw process, in which the glass is drawn into the desired thickness directly from the melt, stable thicknesses of up to 35 micrometers can be achieved. This is how glass thinner than a human hair is produced.

In order to capture the special atmosphere and passion of the employees, we invited a professional photographer.
Making of ultra-thin glass
The plant in Grünenplan was founded in 1744 and has been part of SCHOTT since 1952.
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In 2004, the site was integrated into the Advanced Optics division as a competence center for thin and ultra-thin glass production.
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The melting furnaces run continuously and the batches are changed several times a day.
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The down-draw process is used to produce thin and ultra-thin glass. In this case, a glass ribbon is pulled downwards through the cooling path over several rollers. The pictures show how the system is ramped up.
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This is how it looks when the down-draw system is in operation. The glass ribbon is continuously pulled downwards.
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At the end of the machine, the glass sheets are packed by hand.
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The system is constantly monitored so that fault-free operation is permanently ensured.
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Samples are repeatedly cut and intensively tested as part of quality assurance. Only glass that meets SCHOTT’s high requirements leaves the factory.
March 14th, 2017