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).
Permeability is an important property of barrier coatings. The permeability of a barrier coating's film depends on its moisture vapor transmission rate. The effectiveness of a coating in preventing permeation depends on how closely and tightly bound the molecules of the resin are to one another.