Crizzling

Crisseling, glass disease, sickness. Chemical deterioration of glass is referred to as 'weeping', 'sweating', 'sick', or 'diseased'. It is mainly due to the presence of excess alkalis in the glass reacting to moisture in the atmosphere, forming alkaline condensation, or tears, on the glass surface and creates a fissuring to the glass in fine gleaming lines, like small cracks, and surface dulling. A common glass fault before the late 17th century, when George Ravenscroft remedied it.