Acrylic glass

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Watch glass

Acrylic glass (also: Plexiglas, synthetic glass) consists of polymethyl methacrylate (PMMA) and with its 3-4 Mohs is less scratch-resistant, but quite unbreakable. Scratches can be polished out with a special acrylic polishing paste. From this material extremely arched (domed) watch glasses can be produced quite easily.