Last Updated: Jul 19, 2016     Views: 95

From Dr. Robert Brill, Research Scientist Emeritus:

Dilute hydrofluoric acid (H

2F2) is used to etch glass.  It exerts a vigorous chemical attack on glasses that either eats away the glass from the surface rapidly or produces a diffusing (matte) surface effect.

A mixture of concentrated hydrofluoric acid and sulfuric acid (H2SO4) exerts a somewhat slower attack on glasses and is used for acid polishing.

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