Chemical alteration produced when a basic or alkaline liquid attacks the silica network or other components of glass, a coating, or a decoration.
GlassRenu · Educational illustration
Meaning and boundaries
Alkaline attack is not simply the presence of an alkaline deposit. A high-pH material can leave residue, attack the surface, or do both.
Why it matters in glass restoration
Fresh concrete, cement slurry, caustic cleaners, and some runoff can create persistent haze, roughening, pitting, or loss of gloss.
Related terms
References
- National Glass Association — Assessing the Durability of Decorative Glass
Publisher’s original source - U.S. Environmental Protection Agency — What is pH?
Publisher’s original source - Pilkington / NSG Group — Durability of Glass
Publisher’s original source - International Organization for Standardization — ISO 695:1991 — Glass resistance to boiling mixed alkali
Publisher’s original source