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Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10 −6 K −1 at 20 °C), making them more resistant to thermal shock than any other common glass.
Lampworking can be done with many types of glass, but the most common are soda-lime glass and lead glass, both called "soft glass", and borosilicate glass, often called "hard glass". Leaded glass tubing was commonly used in the manufacture of neon signs, and many US lampworkers used it in making blown work.
The Prussian Society for the Advancement of Industry was one of the earliest organizations to support the collaborative improvement of the quality of glass used. [5] Following the development of borosilicate glass by Otto Schott in the late 19th century, most laboratory glassware was manufactured in Germany up until the start of World War I. [6]
Get tips and tricks on the best kitchen torches to tackle recipes from mac and cheese to steak! The post The Best Kitchen Torches of 2021 appeared first on Taste of Home.
The borosilicate glass of usual laboratory glassware has a lower coefficient of thermal expansion than tungsten, thus it is necessary to use an intermediate sealing glass to get a stress-free seal. There are combinations of glass and iron-nickel-cobalt alloys where even the non-linearity of the thermal expansion is matched. These alloys can be ...
Glass ceramic is used to make products such as Corningware and Pyroflam, which have many of the best properties of both glass and ceramic cookware. While Pyrex can shatter if taken between extremes of temperature too rapidly, glass-ceramics can be taken directly from deep freeze to the stove top.
An evaporating dish is a piece of laboratory glassware used for the evaporation of solutions and supernatant liquids, [a] and sometimes to their melting point.Evaporating dishes are used to evaporate excess solvents – most commonly water – to produce a concentrated solution or a solid precipitate of the dissolved substance.
Commonly referred to as a soldering torch, heat torches used in jewelry making are often fueled by butane, propane, MAPP gas, or a mixture of propane and oxygen.Heat torches are more effective at working with certain metals, such as sterling, gold, and copper, because they are able to heat these metals to a higher degree than traditional soldering irons and soldering guns.