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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 ...
The machines used in making Addressograph plates would deboss (stamp into the plate) the letters into the plate resulting in a well defined printing surface resembling the typewriter fonts of the day on the reverse side that would be used to transfer the details (usually customer addresses) onto envelopes or form letters.
UV inks for letterpress are in paste form, unlike flexo. Various manufacturers produce UV rotary letterpress machines, viz. Dashen, Nickel, Taiyo Kikai, KoPack, Gallus, etc. – and offer hot/cold foil stamping, rotary die cutting, flatbed die cutting, sheeting, rotary screen printing, adhesive side printing, and inkjet numbering.
Ludlow metal typesetting machine in Gutenberg Museum in Fribourg, Switzerland. A Ludlow Typograph is a hot metal typesetting system used in letterpress printing. The device casts bars, or slugs of type, out of type metal primarily consisting of lead. These slugs are used for the actual printing, and then are melted down and recycled on the spot.
The small letters at the base of the matrix are founders marks. Punchcutting is a craft used in traditional typography to cut letter punches in steel as the first stage of making metal type. [1] Steel punches in the shape of the letter would be used to stamp matrices into copper, which were locked into a mould shape to cast type.
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.