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Laboratory safety advisory about the importance of protective goggles, 1955. Goggles, or safety glasses, are forms of protective eyewear that usually enclose or protect the area surrounding the eye in order to prevent particulates, water or chemicals from striking the eyes. They are used in chemistry laboratories and in woodworking.
A watch glass is a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, for heating a small amount of substance, and as a cover for a beaker. When used to cover beakers, the purpose is generally to prevent dust or other particles from entering the beaker; the watch glass does ...
Laboratory glassware is a variety of equipment used in scientific work, traditionally made of glass. Glass may be blown, bent, cut, molded, or formed into many sizes and shapes. Glass may be blown, bent, cut, molded, or formed into many sizes and shapes.
Fracturing is a concern when people new to laboratory become impatient and heat glassware, especially the larger pieces, too fast. Heating of glassware should be slowed using an insulating material, such as metal foil or wool, or specialized equipment such as heated baths , heating mantles or laboratory grade hot plates to avoid fracturing.
Plain wire gauze can transmit heat efficiently, but gauze with a ceramic center disperses the heat more evenly. [4] The ceramic at the centre of the wire gauze is enmeshed at high pressure to prevent it from peeling. [5] Wire gauze may be woven from metals including iron, [5] steel, [6] copper, [7] and nichrome. [8]
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