Ultimately windows will corrode totally aside in every conditions provided sufficient time (Kendrick 1963; Elliott Gould 1988)
As mentioned, staining is highly adjustable and unpredictable. Though cup is relatively an incredibly resilient compound (and it is) it is still at the mercy of the sluggish corrosion by water and agents. This really is a function with the particular constitution of cup as it relates to the chemistry associated with soil/water the cup resides in, as affected by quantity of visibility or communications energy (Munsey 1970). Patination is far more typical in bottles with increased soft drink (and lower lime) articles. Liquids will slowly reduce or leach out of the soft drink part of the glass leaving a coating of sodium carbonate and ultimately silica about. Particularly susceptible containers or people with held it's place in connection with water/soil for a long time will display pitting, which is the severe deterioration associated with the cup surface.
e., earliest to 2nd millennium A.D.