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2. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   PMMA transmits up to 92% of visible light (3 mm (0.12 in) thickness), [18] and gives a reflection of about 4% from each of its surfaces due to its refractive index (1.4905 at 589.3 nm). [3] It filters ultraviolet (UV) light at wavelengths below about 300 nm (similar to ordinary window glass).

3. Insulated glazing - Wikipedia

   en.wikipedia.org/wiki/Insulated_glazing

   It is possible to retrofit insulated glazing into traditional double-hung frames, though this would require significant modification to the wood frame due to the increased thickness of the IG assembly. Modern window units with IG typically completely replace the older double-hung unit and include other improvements such as better sealing ...

4. Bulletproof glass - Wikipedia

   en.wikipedia.org/wiki/Bulletproof_glass

   Bulletproof glass of a jeweler's window after a burglary attempt. The Mona Lisa behind bulletproof glass at the Louvre Museum. Bulletproof glass, ballistic glass, transparent armor, or bullet-resistant glass is a strong and optically transparent material that is particularly resistant to penetration by projectiles, although, like any other material, it is not completely impenetrable.

5. Glazing (window) - Wikipedia

   en.wikipedia.org/wiki/Glazing_(window)

   The ideal gap size varies by location, but on average it ranges from 15-18 mm thick, giving a final assembly size of 23-26 mm assuming a typical glazing thickness of 4 mm. [9] A double-paned window with air in the gap has an R-value of 2.1, which is much better than the 0.9 that a single pane of glass yields. A triple-paned window, which is not ...

6. Window insulation film - Wikipedia

   en.wikipedia.org/wiki/Window_insulation_film

   A typical window insulation film kit, consisting of plastic shrink film (folded-up) and a roll of double-sided tape. One commonly used film is a heat-shrink plastic which is attached to the window frame using double-sided pressure-sensitive tape. A hair dryer is used to remove creases and improve optical clarity.

7. Window film - Wikipedia

   en.wikipedia.org/wiki/Window_film

   A window film, sometimes called ... these films are made of heavy-gauge plastic and are intended to maintain the integrity of glass when ... (of 100 μm thickness or ...