This watch glass is mainly used in the laboratory and in homes, such for beaker covers, temporary storage of liquid and solid samples, corrosive substances weighing, paint mixing, etc. The glass is made of table glass with high chemical durability, which has corrosion resistance, which can effectively keep the material pure, increase the liquid surface area to accelerate evaporation, etc. Before use, the watch glass needs to be washed and dried, which can effectively avoid the influence of other substances on the experimental results. After application, it should be cleaned and dried in time to avoid residual substances that are difficult to wash off and affect the next use. This Watch Glass cannot be heated directly with fire to prevent rupture or be used as an evaporation dish. Note that the watch glass is selected according to the caliber of the instrument. Generally, the diameter of the watch glass should be larger than the diameter of the instrument by 1cm.
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