The conical, straight-sided pint glass, also known as a Boston shaker glass, was originally used to shake cocktails, not serve beer. But it has been a fixture in bars since the early 20th century, thanks to its utility: Itâs easy to stack, hard to break and perfect for displaying beer or bar advertisements.
Apart from glove material, other factors contributed to glove permeability, such as the duration of exposure, the thickness of the material, and the liposolubility or the molecular weight of the drug. Permeation was clearly related to the duration of exposure. All glove materials displayed a general trend toward greater permeation over time, increasing by a mean 5-fold factor between 15 and 60 minutes (the steepest increase being observed during the first 15 minutes).
With the aid of a computer program, the machine measures the force necessary to cut the sample glove material. This is done as the razor blade travels a fixed distance across the surface of the glove material. In this way, the cut resistance of different gloves can be accurately compared. With this information, and considering the cost and comfort of the gloves, a better decision can be made about what glove is best for a particular job.