Mint-made errors are called "type-2 blanks (or planchets)" after an upending mill adds uniform, rounded rims. Type-2 blanks may also be considered striking errors as they are prepared correctly, but are released without having been struck. A misfeed can occur when the metal strip is fed through the blanking machine. The punches sometimes overlap the leading edge of the metal producing a straight clip. Sometimes, the punches strike an area of the strip which overlaps the hole left by the previous strike producing a curved clip. Sometimes punches strike the irregular trailing edge of the metal strip producing irregular clips. Coins are
Hausmaler After the disturbances of the Russian Revolution many pre-revolutionary blanks of the Imperial Porcelain Factory, Saint Petersburg were painted by artists as long as ten years later, in bold new Constructivist styles; such pieces are now highly sought-after. Chinese Canton porcelain of the 18th and 19th centuries used a similar system, but on a larger scale. The blanks were Jingdezhen porcelain which was carried the considerable distance to Guangzhou before being decorated. Hausmaler In pottery hausmaler () is a term for the artist, the style, and the pieces in hausmalerei, the process of buying pieces of pottery as plain "blanks",