page_title: Mint (facility)
section_title: Early minting technology
hierarchical_section_title: Mint (facility) / History / Early minting technology
caption_attribution_description: English: Horse head, rough incuse, Ionia, Uncertain city 600-550 BC, Hemiobol
context_page_description: A mint is an industrial facility which manufactures coins that can be used as currency.
  The history of mints correlates closely with the history of coins. In the beginning, hammered coinage or cast coinage were the chief means of coin minting, with resulting production runs numbering as little as the hundreds or thousands. In modern mints, coin dies are manufactured in large numbers and planchets are made into milled coins by the billions.
  With the mass production of currency, the production cost is weighed when minting coins. For example, it costs the United States Mint much less than 25 cents to make a quarter, and the difference in production cost and face value helps fund the minting body. Conversely, a U.S. penny cost $0.015 to make in 2016.
context_section_description: Ancient coins were made by casting in moulds or by striking between engraved dies. The Romans cast their larger copper coins in clay moulds carrying distinctive markings, not because they knew nothing of striking, but because it was not suitable for such large masses of metal. Casting is now used only by counterfeiters. 
   The most ancient coins were cast in bulletshaped or conical moulds and marked on one side by means of a die which was struck with a hammer. The "blank" or unmarked piece of metal was placed on a small anvil, and the die was held in position with tongs. The reverse or lower side of the coin received a "rough incuse" by the hammer. Later a rectangular mark, a "square incuse", was made by the sharp edges of the little anvil, or punch. The rich iconography of the obverse of the early electrum coins contrasts with the dull appearance of their reverse which usually carries only punch marks. The shape and number of these punches varied according to their denomination and weight-standard. Subsequently, the anvil was marked in various ways, and decorated with letters and figures of beasts, and later still the anvil was replaced by a reverse die. The spherical blanks soon gave place to lenticular-shaped ones. The blank was made red-hot and struck between cold dies. One blow was usually insufficient, and the method was similar to that still used in striking medals in high relief, except that the blank is now allowed to cool before being struck. With the substitution of iron for bronze as the material for dies, about 300 AD, the practice of striking the blanks while they were hot was gradually discarded.
  In the Middle Ages bars of metal were cast and hammered out on an anvil. Portions of the flattened sheets were then cut out with shears, struck between dies and again trimmed with shears. A similar method had been used in Ancient Egypt during the Ptolemaic Kingdom (c. 300 BC), but had been forgotten. Square pieces of metal were also cut from cast bars, converted into round disks by hammering and then struck between dies. In striking, the lower die was fixed into a block of wood, and the blank piece of metal laid upon it by hand. The upper die was then placed on the blank, and kept in position by means of a holder round which was placed a roll of lead to protect the hand of the operator while heavy blows were struck with a hammer. An early improvement was the introduction of a tool resembling a pair of tongs, the two dies being placed one at the extremity of each leg. This avoided the necessity of readjusting the dies between blows, and ensured greater accuracy in the impression.
caption: Ionia, Uncertain city (possibly Kyme, Aeolis) 600–550 BCE, Hemiobol. Horse head, rough incuse
exif: {"Image XResolution": "96", "Image YResolution": "96", "Image ResolutionUnit": "Pixels/Inch", "Image YCbCrPositioning": "Centered", "Image ExifOffset": "90", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "274", "Thumbnail JPEGInterchangeFormatLength": "9171", "EXIF ExifVersion": "0221", "EXIF ComponentsConfiguration": "YCbCr", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "600", "EXIF ExifImageLength": "339", "EXIF SceneCaptureType": "Standard"}