BLOCKS [Perspex]: Rectangle, Semicircle

BLOCKS [Perspex]: Rectangle, Semicircle

• These perspex blocks are the ones supplied with the LIGHT BOX & OPTICAL SET.
• They have a small handle for moving them without having to touch the polished surfaces.

(Wikipedia excerpt: .."...Poly(methyl methacrylate) (PMMA) is a synthetic polymer derived from methyl methacrylate. It is a transparent thermoplastic, used as an engineering plastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Hesalite, Plexiglas, Acrylite, Lucite, and Perspex, among several others (see below). This plastic is often used in sheet form as a lightweight or shatter-resistant alternative to glass. It can also be used as a casting resin, in inks and coatings, and for many other purposes.

It is often technically classified as a type of glass, in that it is a non-crystalline vitreous substance—hence its occasional historic designation as acrylic glass....")

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