WATCH GLASS

A watch glass is a versatile piece of laboratory glassware used for various purposes, including evaporation, covering vessels, and holding small amounts of substances. It is a circular, concave piece of glass that resembles a watch face, hence the name. Typically made from high-quality borosilicate glass, watch glasses are designed to be durable and resistant to chemical reactions and thermal stress.

Uses:

• Evaporation: Watch glasses are commonly used to evaporate solvents from solutions, allowing the remaining residue to be easily analyzed or handled.
• Covering: They can be placed on top of beakers or flasks to prevent contamination, reduce evaporation, or control reactions.
• Sample Holding: Watch glasses are also used to hold small amounts of solid substances, such as powders or crystals, during preparation or weighing.

Due to their simple yet functional design, watch glasses are essential tools in chemistry, biology, and material science laboratories.