Stand for minerals, fossils, shells and more. (Pack of 2 pieces)

Polymethyl methacrylate (PMMA) is a polymer of methyl methacrylate. This transparent thermoplastic plastic is better known under the trade names Perspex, Plexiglas, Altuglas and Oroglas, but also simply as the acrylate. Polymethylmethacrylate leave about ninety percent of the light and is therefore often used in place of glass, with respect to which it offers a number of advantages: it is lighter; not shatter; it is easy to produce in various forms; it lets more light than regular glass. PMMA is used in applications where the great weight savings relative glass provides a great advantage and also where high transparency is desired. such as caravan windows or large aquariums, the world's largest aquariums have windows several meters wide and high and a thickness up to 30 cm, made of PMMA. They can also be made in pieces and almost invisible with adhesive for assembly. Furthermore, PMMA is a widely used material for transparent noise barriers. PMMA is less used for safety applications, it has less impact resistance (better than glass) and it breaks into sharp pieces. Nowadays there PMMA grades that are quite resistant to impact. Moreover, it is highly combustible so it can never be used for passenger transport (trains, trams, buses). For this, the used unbreakable, at higher-temperature resistant and self-extinguishing polycarbonate, which is about the same duration. PMMA was also used for the first implant lenses in the ophthalmology.