A glass blank is a piece of glass that requires additional decoration before it is considered finished.[1] Types of decoration include cutting, engraving, acid-etching, gilding, and enameling. Often the term blank is used in reference to an uncut piece of glass that will be cut or engraved.[2] "Blank" is used in the same way of pottery, especially porcelain, that was often decorated elsewhere, for example by hausmalers.