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2. Silvering - Wikipedia

   en.wikipedia.org/wiki/Silvering

   When glass mirrors first gained widespread usage in Europe during the 16th century, most were silvered with an amalgam of tin and mercury, [6] In 1835 German chemist Justus von Liebig developed a process for depositing silver on the rear surface of a piece of glass; this technique gained wide acceptance after Liebig improved it in 1856.

3. The Mirror Crack'd - Wikipedia

   en.wikipedia.org/wiki/The_Mirror_Crack'd

   The Mirror Crack'd is a 1980 British mystery film directed by Guy Hamilton from a screenplay by Jonathan Hales and Barry Sandler, based on Agatha Christie's Miss Marple novel The Mirror Crack'd from Side to Side (1962). It stars Angela Lansbury, Geraldine Chaplin, Tony Curtis, Edward Fox, Rock Hudson, Kim Novak, and Elizabeth Taylor.

4. Borosilicate glass - Wikipedia

   en.wikipedia.org/wiki/Borosilicate_glass

   Guitar slide made of borosilicate glass. Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10 −6 K −1 at 20 °C), making them more resistant to thermal shock than any other common glass.

5. Mercury glass - Wikipedia

   en.wikipedia.org/wiki/Mercury_glass

   Mercury glass (or silvered glass) is glass that was blown double walled, then silvered between the layers with a liquid silvering solution, and sealed. Although mercury was originally used to provide the reflective coating for mirrors, elemental mercury was never used to create tableware.

6. Laminated glass - Wikipedia

   en.wikipedia.org/wiki/Laminated_glass

   Automobile windshield with "spider web" cracking typical of laminated safety glass. Laminated glass is a type of safety glass consisting of two or more layers of glass with one or more thin polymer interlayers between them which prevent the glass from breaking into large sharp pieces. [1]

7. Windshield - Wikipedia

   en.wikipedia.org/wiki/Windshield

   Repair of cracks up to 6.1 cm (2.4 inches) is within permissible limits; automobile glass with more severe damage needs to be replaced. However, this is dependent on local laws. If a crack extends to the edge of the panel then this would compromise the structural integrity of the windshield.