![]() ![]() Plexiglass catches on fire at 450° Celsius which classifies it as a highly flammable material. Plexiglass has a melting point of approximately 265–285☏ (130–140☌ ), which is very much lower than that of glass (approx. Polishing scratches in plexiglass is somewhat easier (using fine sandpaper and plastic polish) than polishing glass but this benefit is offset by the higher vulnerability of acrylic scratching. The hardness of plexiglass is often measured on the “pencil” scale and is scratched by hard pencil lead (4H) – this translates to about 3 on Moh’s scale so plexiglass is considerably softer than glass. So it can be scratched by carbide steel or quartz (hardness 7). Tempered glass (used for windows etc) has a hardness of about 6 on Moh’s scale (diamond = 10). Plexiglass scratches much more easily than glass. The most important differences are summarized below: Plexiglass is lighter than glass but more expensive In order to make an apples-to-apples comparison, we compare regular plexiglass with regular tempered glass in this post – but always remember that many upgrades are available. These include UV coatings for plexiglass, anti-glare coatings for picture framing, stain-resisting coatings for shower doors, low-E coatings for insulated glass, and coatings for plexiglass to improve hardness (eg LUXACRYL ®), and many more. Plexiglass and glass are both transparent, non-crystalline, man-made materials with very wide commercial, domestic and industrial uses in modern life.īoth glass types are available with modifications (mainly surface coatings) designed to improve their performance. Read on to learn about the most important differences between the two materials.Īs an Amazon Associate, I earn from qualifying purchases Differences between plexiglass & glass Many products like windows, shelves, tabletops, and screens can be made with both plexiglass and glass. Learn about annealed and tempered glass in this post. Glass is a unique substance made by melting silica sand with various additives to make a vast range of clear or colored, transparent, or opaque products. ![]() For the purpose of this post, PMMA sheets will be referred to using the commonest US term: plexiglass. Other brand names for the same product include Perspex®, Lucite®, and Acrylite®. It is now known by the generic name “ Plexiglass“. Plexiglas® is the trade name for a type of acrylic sheet, made by the German company Roehm, from Poly(methyl methacrylate), or PMMA. Unlike glass, it can be easily machined: drilled, sawed, bent, and molded to form useful objects. It is clearer than glass but will yellow when exposed to UV light. Plexiglass is lighter in weight and stronger than glass but it is more expensive and more easily scratched.
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