Beakers are containers used by chemists, researchers, and educators to measure, mix, analyze, transport, and heat substances in a variety of laboratory, educational, and life science applications. Beakers are commonly made of glass such as borosilicate, and can also be made of stainless steel, or plastic materials such as polytetrafluoroethylene (PTFE), polypropylene, or polyethylene. Material types are chosen for their chemical, heat, and corrosion resistance, and for their surface finish, clarity, and non-contaminating abilities. Beaker forms commonly include Griffin (low overall height), Berzelius (a high form), or a shallow and wide structure, which is used for liquid crystalization. A beaker's outer diameter (OD) measurement does not include the rim. Beakers can meet ASTM E-960 specifications for classification, design, capacity and dimensions, and markings.Dual Manufacturing Company manufactures and distributes metal laboratory equipment including testing sieves, beakers, crucibles, and other related products. The company, founded in 1942, is headquartered in Franklin Park, IL.
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