Deposits and contamination

A solid mineral accumulation formed when dissolved constituents precipitate from water or become concentrated during heating or evaporation.

Mineral salts and other substances present in water at the molecular or ionic level rather than as visible suspended particles.

The concentration of dissolved multivalent minerals in water, principally calcium and magnesium, commonly expressed as an equivalent amount of calcium carbonate.

A visible discoloration or appearance change associated with material on, in, or chemically interacting with a surface.

A localized mark left where a water droplet or small wet area dried and concentrated dissolved or suspended material.

A thin, broadly distributed layer of foreign material that changes the appearance, wetting, or feel of a glass surface.

Material accumulated or precipitated on a glass surface through runoff, evaporation, transfer, overspray, or another deposition process.

Discrete particles resting on a surface without a strong bond to it, such as dust, grit, sand, or construction debris.

Material remaining on glass that is attached strongly enough that ordinary rinsing or light wiping does not remove it.

Unwanted material present on a glass or coating surface that is not part of the intended glass construction.