Surface Vessels

The watch glass is made of glass, round in shape, slightly concave in the middle, similar to an evaporating dish. It can be used to do some work of evaporating liquids. It can increase the surface area of some evaporating liquids, thereby speeding up evaporation. However, it cannot be heated like an evaporating dish. It needs to be padded with asbestos mesh. It can be used as a cover to cover the evaporating dish or beaker to prevent dust from falling into the evaporating dish or beaker; it can be used as a container to temporarily hold solid or liquid reagents for easy access; it can It is used as a carrier to carry PH test paper so that the acid or alkali liquid dropped on the test paper does not corrode the experimental bench.