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2. Penny Black printing plates - Wikipedia

   en.wikipedia.org/wiki/Penny_black_printing_plates

   The construction of these plates was long and complicated, which was intentional so as to make the forgery of the finished article almost impossible. The first stage involved the engraving of a background for the design. This was produced with a rose engine which laid down a circular pattern of symmetrical design onto a piece of soft steel.

3. Perkins Bacon - Wikipedia

   en.wikipedia.org/wiki/Perkins_Bacon

   Messrs. Perkins, Bacon & Co was a printer of books, bank notes and postage stamps, most notable for printing the Penny Black, the world's first adhesive postage stamps, in 1840. Details on the mode of preventing the forgery of bank notes. England’s currency was being forged at an alarming rate. The smaller bills were even being forged by ...

4. Nameplate - Wikipedia

   en.wikipedia.org/wiki/Nameplate

   Nameplate. A nameplate identifies and displays a person or product's name. Nameplates are usually shaped as rectangles but are also seen in other shapes, sometimes taking on the shape of someone's written name. Nameplates primarily serve an informative function (as in an office environment, where nameplates mounted on doors or walls identify ...

5. Photoengraving - Wikipedia

   en.wikipedia.org/wiki/Photoengraving

   A print made in 1907 from a photoengraved plate. It reproduces a sketch of Parga's castle made by Ludwig Salvator.. Photoengraving is a process that uses a light-sensitive photoresist applied to the surface to be engraved to create a mask that protects some areas during a subsequent operation which etches, dissolves, or otherwise removes some or all of the material from the unshielded areas of ...

6. Art and engraving on United States banknotes - Wikipedia

   en.wikipedia.org/wiki/Art_and_engraving_on...

   Art and engraving on United States banknotes. In early 18th century Colonial America, engravers began experimenting with copper plates as an alternative medium to wood. Applied to the production of paper currency, copper-plate engraving allowed for greater detail and production during printing. It was the transition to steel engraving that ...

7. Steel engraving - Wikipedia

   en.wikipedia.org/wiki/Steel_engraving

   Steel engraving. Steel engraving is a technique for printing illustrations based on steel instead of copper. It has been rarely used in artistic printmaking, although it was much used for reproductions in the 19th century. Steel engraving was introduced in 1792 by Jacob Perkins (1766–1849), an American inventor, for banknote printing.