Indispensable in biology and chemistry laboratories, lab glass is traditionally made of heat-resistant glass but is now produced in plastic and plastic-coated glass. Plastic goods are cheaper, not easily broken, and serve many purposes in the laboratory. Plastic coated glass is used for hazardous chemicals if broken. The plastic layer will hold chemicals until they can be properly disposed of. Glass is still preferred for many uses because of its transparency, heat resistance, and chemical stability.
The most commonly used glass is clear glass, borosilicate, also known as Pyrex, which can withstand heating pressure. Brown or yellow glass is used to keep the content protected from the ultraviolet and infrared spectrum and is available for glassware containers.
No matter what material the laboratory glass is made of, the names of the various types of glass remain consistent and are based on the intended shape, volume, and usage.
Pumpkin
Laboratory flasks are characterized by their shape, with a larger base and a narrow open
nissui idonesia neck. Pumpkin serves a variety of purposes from collecting liquids to heating a mixture. They vary in size and shape, some have two necks. They are also produced in plastic and glass.
Erlenmeyer Pumpkin, also known as cone pumpkin, is the most common type of pumpkin. First used by the German chemist Emil Erlenmeyer, they were flat and conical in shape with a single neck.
The Buchner Pumpkin is basically an Erlenmeyer flask with a small tube extending horizontally out of the neck. The side arms are specially made to fit the flexible hose. This pumpkin is made of thick glass to withstand changes in pressure because it is often used to make vacuums.
Volumetric flasks are precision flasks designed to measure liquids accurately. Metric measurements are marked on the flask. Pumpkin has a pear or slightly round shape with a long thin neck.
Florence, or round pumpkins are generally round with one or more long necks. There are several flat-bottomed Florence pumpkins who can sit without support. It is produced from borosilicate glass because it is used to boil over a Bunsen burner and must be heat-resistant.
Retorts are designed for distillation. It has a round base and a very long tapered neck that points down. The liquid is heated at the bottom, and condensation then flows to the neck to a different container.
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