watch glass


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watch glass

A shallow, saucer-like glass dish, resembling the glass cover widely used to cover the face of a large pocket watch.
See also: glass
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* Watch glasses (optional): Cover your stemware to keep aromas in the glass instead of filling up the room.
Or find out about medieval masonry maintenance of the castle, take home tips on jam and preserve making, or watch glass jewellery being fashioned.
At both factories you can shop for gifts and also watch glass blowers at work, and there is an extensive glass museum at Hergiswil.
The mixture in a beaker was covered with a watch glass and refluxed for 45 min.
You can watch glass being blown at some of the city's 20 galleries featuring glass.
This is a simple test where a clean watch glass is weighed, the coating sample is put on the glass, and it is then reweighed.
Each specimen was tested individually in 300 ml of solution contained within a 400 ml glass beaker covered with a watch glass. Prior to testing, all beakers and watch glasses were washed with soap and water, rinsed once with tap water, rinsed twice with deionized water, rinsed once with 0.1 M HN[O.sub.3], and rinsed twice more with deionized water.
4.15 Stain Resistance Stain resistance is measured by applying stain to the paper surface, covering with a watch glass for 24 hours, removing the glass and cleaning the surface with water only, then soapy water, and lastly, isopropyl alcohol.