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2. Mirror - Wikipedia

   en.wikipedia.org/wiki/Mirror

   Alternatively, a flexible transparent plastic film may be bonded to the front and/or back surface of the mirror, to prevent injuries in case the mirror is broken. Lettering or decorative designs may be printed on the front face of the glass, or formed on the reflective layer. The front surface may have an anti-reflection coating. [citation needed]

3. Flexible glass - Wikipedia

   en.wikipedia.org/wiki/Flexible_glass

   Flexible glass is an alleged lost invention from the time of the reign of Tiberius Caesar. The story is assumed to be almost certainly false. The story is assumed to be almost certainly false. [ 1 ]

4. Poly(methyl methacrylate) - Wikipedia

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

   It is used for plastic histology, electron microscopy, as well as many more uses. PMMA has been used to create ultra-white opaque membranes that are flexible and switch appearance to transparent when wet. [46] Acrylic is used in tanning beds as the transparent surface that separates the occupant from the tanning bulbs while tanning.

5. One-way mirror - Wikipedia

   en.wikipedia.org/wiki/One-way_mirror

   One-way mirrors for upper-level observation deck viewing down into a classroom (University of Wisconsin-Eau Claire) A one-way mirror, also called two-way mirror [1] (or one-way glass, half-silvered mirror, and semi-transparent mirror), is a reciprocal mirror that appears reflective from one side and transparent from the other. The perception of ...

6. Fiberglass - Wikipedia

   en.wikipedia.org/wiki/Fiberglass

   A suitable resin for combining the fiberglass with a plastic to produce a composite material was developed in 1936 by DuPont. The first ancestor of modern polyester resins is Cyanamid's resin of 1942. Peroxide curing systems were used by then. [6] With the combination of fiberglass and resin the gas content of the material was replaced by plastic.

7. Plastic welding - Wikipedia

   en.wikipedia.org/wiki/Plastic_welding

   An important aspect of plastic welding rod design and manufacture is the porosity of the material. A high porosity will lead to air bubbles (known as voids) in the rods, which decrease the quality of the welding. The highest quality of plastic welding rods are therefore those with zero porosity, which are called voidless.