Sooner windows will corrode totally aside in just about any atmosphere offered the time (Kendrick 1963; Elliott Gould 1988)
As observed, staining is extremely changeable and unpredictable. Though cup is actually seemingly a highly resistant material (as well as being) it is still susceptible to the sluggish deterioration by water and chemicals. It is a function with the specific structure from the cup as it relates to the chemistry of soil/water your glass stays in, as affected by amount of exposure or call opportunity (Munsey 1970). Patination is far more typical in bottles with a high soda (and low lime) information. Liquid will gradually break down or leach from the soda part of the cup making a coating of sodium carbonate and finally silica at the rear of.