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Most modern concrete stamps are made of polyurethane, but older "cookie cutter" style stamps were made of various metals. The old style stamps lacked the capabilities of forming natural stone texture. Concrete stamping is the procedure which uses the concrete stamps to make the pattern in the stamped concrete. Concrete stamps are placed on the ...
Australian karat stamps for gold (375) and platinum (950). Specially-made stamps used to strike hallmarks for metal, maker, manufacturing date (also known as date letter), city (or county), fineness, or assay office, to certify the content of noble metals—such as platinum, gold, silver.
Stamping (also known as pressing) is the process of placing flat sheet metal in either blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape. Stamping includes a variety of sheet-metal forming manufacturing processes, such as punching using a machine press or stamping press , blanking, embossing ...
On coil stamps (stamps issued in a long band of single stamps with the edges imperforate) a plate number sometimes is printed on the margin of a stamp, which collectors refer to as a plate number coil. Mint plate number coil stamps are most often collected as strips of three or five with the stamp with the plate number at the center of the ...
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