Repair instead of replace

Thanks to our grinding process, you can save costs:

  • A new pane of glass often costs more than grinding.
  • Transporting and installing replacement windows are time-consuming and expensive.
  • You are conserving the environment by saving resources.

What does glass actually consist of?

“Take 60 parts sand, 180 parts ash from sea plants, 5 parts chalk - and you get glass.”

Making glass is that easy if you follow the recipe from the clay tablet library of the Assyrian king Ashurbanipal who ruled around 650 BC. Essentially, the ingredients are still the same. 

Glass consists mainly of molten sand. In addition, it also consists of several substances of natural origin. Temperatures of around 1600 degrees Celsius are required for its production.

Most glass is produced according to the following mixing ratio:

  • 70% quartz sand
  • 13% soda
  • 10% lime
  • In addition, dolomite, potash and feldspar are used.

Depending on the final product, the composition is slightly varied.

Long before humankind discovered glassmaking, materials were fused by the heat of volcanoes. This is how the first natural glass was created: the night-black obsidian, from which arrowheads and the first mirrors were made.

Links on the topic of sand: (in German only)

Sand: Ein alltäglicher Rohstoff wird knapp

SRF Trend – Das Wirtschaftsmagazin, 1. Mai 2020

«Der Welt geht der Sand aus»

Mit freundlicher Genehmigung der NZZ am Sonntag 

NZZ am Sonntag
30. August 2020

2020 © NZZ am Sonntag

Link zum Originalartikel

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GW-SWISS GmbH    +41 44 915 03 81