Mint-made errors 5 centavos. Foreign coins struck on a U.S coin planchet or vice versa are very uncommon and hold a high value. Authentic error coins should not be confused with coins that are damaged after being minted, which is known as post-mint damage (PMD) or post-strike damage (PSD). Mints purchase long strips of metal which are fed through blanking machines that punch out disks known as blank planchets (or simply as planchets or blanks) on which coins are struck. This determines the size and shape of eventual coins. The punched disks are first known as "type-1 blanks (or planchets)". The disks
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",