It can hold a small amount of liquid or solid. Meaning of watch glass. Concave shape prevents sliding and return of condensation to the beaker. Concave shaped watch glass used as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for flasks or beakers. Watch glasses are circular, slightly-concave pieces of glass that are used by chemists to evaporate liquids and cover beakers during sample preparation. ... Used with a ring stand to hold glassware, such as a beaker or a funnel. Manufactured from clear glass sheet (1.8 to 2.0mm thick), these watch glasses are fire ground and have polished edges. Gert Wrigge & Ilja Gerhardt. SpectrumChemical.com carries a full line of Lab Glassware. They can be used for evaporation purposes and also can function as a lid for a beaker. A watch glass is just a round piece of glass that is slightly concave/convex (think of a lens). Spectrum Chemical has a complete line of laboratory supplies, equipment and safety items. A watch glass is a circular, slightly convex-concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for a beaker. Pricing & … From $474.35. Sort. Pyrex has its origins in the early 1910s, when American glass company Corning Glass Works began looking for new products to feature its borosilicate glass… Watch glasses are concave dishes that have a variety of uses. Watch glasses are nice for holding small samples for observation under a … CG-9800-02 19/22 ORGANIC CHEMISTRY LABSET KITS, 19/22. ... slightly convex-concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for a beaker. When used as a beaker cover, a watch glass prevents the ingress of contaminants while allowing gas exchanges to occur. Collaborate with scientists in your field of chemistry and stay current in your area of specialization. From $604.75. Used to hold solids while they are being weighed or to cover a beaker. They can serve as lids for flasks and beakers. MW-13 MINUM-WARE® KITS, INTERMEDIATE. Virtually immune to chemical attack, only attacked by some fluorine containing compounds at high temperature and… A watch glass is a circular, slightly concave piece of glass used in chemistry as a surface to evaporate a liquid, or as a cover for a beaker. Isostatically molded beaker covers (watch glass) from virgin polytetrafluoroethylene and machine finished to give a smooth surface for ease of cleaning and to eliminate contamination. Find Lab Watch Glasses & Rods for your Chemical Lab now at SpectrumChemical.com. Grid; List; CG-9800-01 14/20 ORGANIC CHEMISTRY LABSET KITS, 14/20. View. Watch Glass Waterless Condensers Weighing Boats/Dishes Laboratory Glassware Kits. Chemistry Laboratory Glassware Potassium ferricyanide in a watch glass. Watch Glass, 12 Pack. MW-11 MINUM-WARE® KITS, DELUXE. It can also be employed for weighing solids and as a lid for flasks and beakers. Discover Chemistry. Diameter 60mm (2.4 in) Diameter 70mm (2.8 in) Diameter 80mm (3.2 in) Diameter 100mm (4 in) … A watch glass is a round, concave glass dish used for evaporation in chemistry. They are also used to hold solids during weighing. ... Watch Glass. From $587.00. What does watch glass mean? Watch Glass Sizes. From $393.65. Shape prevents sliding and return of condensation to the beaker be used for evaporation in chemistry for and. Watch glass prevents the ingress of contaminants while allowing gas exchanges to occur glass prevents the of... Serve as lids for flasks and beakers, these watch glasses are fire ground and have polished.... And also can function as a beaker ( think of a lens ) List CG-9800-01. For flasks and beakers slightly concave/convex ( think of a lens ) round piece of glass that is slightly (! 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