Crystallization dishes and watch glasses

In chemical laboratory technology, curved discs of transparent material with a diameter of six to 20 centimeters are called watch glass or watch glass shell.

The concave shape allows small amounts of liquids to be poured into watch glasses to allow them to evaporate. Borosilicate glass watch glasses can also be heated over Bunsen burners to speed up evaporation.

Watch glasses are often used to briefly cover beakers, petri dishes or the opening of flasks or bottles to protect against contamination, splashes and strong evaporation. Today, in the laboratory, vessels are often covered with parafilm or aluminum foil as a sealing foil instead of watch glasses, and are often completely sealed with sealing plugs.

Watch glasses are also suitable for weighing in and out of smaller quantities of substances or for drying in a drying cabinet.

You can buy these watch glasses and crystallising scales at Laboratory discounter with a fast delivery for a friendly price.