Numismatic Dictionary

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There are 24 names in this directory containing the search term planchet. Clear results.
blank
A flat disk of metal destined to be made into a coin. See also planchet.

clashed dies
Extraneous design detail often appears on a die as a result of two dies coming together without a planchet between them during the minting process.

clip
Term used for a coin struck from a clipped planchet.

clipped planchet
Term used to describe a planchet that may have been cut incorrectly from the metal sheet. The clipped area may be curved if cut into the area where another planchet was cut out or straight if cut beyond the edge of the metal strip.

delamination
A form of planchet flaw caused by imperfections in the metal whereby a thin strip of the metal separates itself from the coin.

die
A cylindrical piece of metal containing an incuse image of a coin design that imparts a raised image when stamped into a planchet on a coining press.

flow lines
Visible lines on a coin that was the result from the metal flowing outward from the center of a planchet as it is struck. See also cartwheel.

hub
A piece of die steel showing the coinage devices in relief, or raised, as they are on a coin. The hub is pressed into the blank die, resulting in an incused, mirror image on the die. The die is then pressed into a planchet, or coin blank, on a coining press, to produce a coin. See also error.

lamination
Lamination is a type of error in the planchet that occurs when a thin layer of the metal splits or peals away from the surface of the coin. See also planchet flaw.

lint mark
A small, thin, irregular depression on a coin’s surface caused by a piece of lint adhering to the die or planchet during the minting process.

Metal stress lines
Radial lines, sometimes visible, caused by metal flowing outward from the center of the planchet during the minting process. See also flow lines or cartwheel.

off metal
A type of error that occurs when a coin is struck on a planchet that it is not normally struck, such as striking of a quarter on a planchet that was supposed to be for a nickel.

open collar
A device used to position a planchet over the lower die. It was employed specifically for striking early U.S. coins whose edges had already been stamped with reeding or lettering.

pewter
A grayish soft metal made of 85-95 percent tin. For coin making, the balance of the alloy is usually copper but lead has been used in some poorer countries. When used as a coinage metal, the planchets are small to prevent bending. Pewter is not used in the United States.

piedfort
In French is written as piefort, this is a coins struck on a planchet that is thicker than circulating coins.

planchet
A flat disk of metal destined to be made into a coin. See also blank.

planchet defect
Any defect of a coin that was caused by the planchet being imperfect prior to the coin being struck. See also planchet flaw

planchet flaw
An irregular hole in a coin blank sometimes the result of a lamination that has broken away. See also lamination.

planchet striations
Fine, incuse lines found on some Proof coins potentially caused by polishing of the blanks prior to striking.

proof
The process of striking a special version of a coin with higher quality dies and specially polished planchets.

Stella
Name given to an experimental four-dollar goloid coins struck by the U.S. Mint in 1879-1880. The Stella was struck using a planchet whose alloy was 6.00g Au, 0.30g Ag, and 0.70g Cu while the United States was considering joining the Latin Monetary Union (LMU), the forerunner to the Eurozone. Congress rejected the proposal to join the LMU and the Stella program ended.

strip
The flattened sheet of metal from which blank planchets are punched.

tombac
A type of brass whose alloy consists of 85-percent brass and 15-percent zinc giving it a yellowish color. In 1942 and 1943 Canadian 5 cent coins were struck using planchets made of tombac.

zinc
An inexpensive silvery metal that is used as part of an alloy to make planchets. The 1943 Steel Cent was made from zinc-coated steel. Lincoln cents made since 1982 are copper-coated zinc coins. Its chemical symbol is Zn.

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