A wearing, grinding or rubbing away by friction.

The inherent ability of a coating or substrate to resist degradation or destruction by friction.

The process of decorating glass, which involves the application of hydrofluoric acid to the glass surface.

A process used in the production of cut crystal to remove the opacity of etched surfaces where decoration has been applied. Items to be polished are immersed in a mixture of demineralized water, sulphuric acid and hydrofluoric acid, and then rinsed. There may be a single short immersion in a stronger solution, or a series of immersions in a weaker solution.

See acid etching

Sharpness

The ability of coatings to adhere one to another.

The ability of a coating film to maintain its internal integrity without separating or layering.

Attachment of a coating film to a surface by molecular attraction without altering the coated surface.

An elongated bubble in glass.