helaste
Helaste is a term that refers to a specific type of glass processing technique. It is a Finnish word that translates loosely to "frosting" or "etching" of glass. This process involves creating a matte or frosted surface on glass by chemically or mechanically altering its smoothness.
Chemically, helaste is often achieved using hydrofluoric acid. The acid reacts with the silica in the glass,
Helaste is employed for a variety of purposes in glass manufacturing. It can be used for decorative