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Electrotyping. Schematic apparatus for electrotyping. An electric current flows from the battery, through the copper anode, the electrolyte, and the coated mold. A copper film (the electrotype) grows onto the electrically conducting coating of the mold. Electrotyping (also galvanoplasty) is a chemical method for forming metal parts that exactly ...
Stereotype (printing) A stereotype mold ("flong") being made. Stereotype casting room of the Seattle Daily Times, c. 1900. In printing, a stereotype, [note 1] stereoplate or simply a stereo, is a solid plate of type metal, cast from a papier-mâché or plaster mould taken from the surface of a forme of type. [1]: stereotype The mould was known ...
Electroforming. Electroforming is a metal forming process in which parts are fabricated through electrodeposition on a model, known in the industry as a mandrel. Conductive (metallic) mandrels are treated to create a mechanical parting layer, or are chemically passivated to limit electroform adhesion to the mandrel and thereby allow its ...
Lawrence Johnson (23 January 1801 – 24 April 1860), was born and educated in England. After an early apprenticeship in the printing industry, he emigrated to America in his youth, and became an eminent stereotyper and type-founder in Philadelphia [1] and one of the most extensive and successful type-founders in the United States.
Daniell cell. Daniell cells, 1836. The Daniell cell is a type of electrochemical cell invented in 1836 by John Frederic Daniell, a British chemist and meteorologist, and consists of a copper pot filled with a copper (II) sulfate solution, in which is immersed an unglazed earthenware container filled with sulfuric acid and a zinc electrode.
A lemon battery is a simple battery often made for the purpose of education. Typically, a piece of zinc metal (such as a galvanized nail) and a piece of copper (such as a penny) are inserted into a lemon and connected by wires. Power generated by reaction of the metals is used to power a small device such as a light-emitting diode (LED).
Cerography. Cerography or glyphography is a printmaking technique related to engraving, using a layer of wax over a metal substrate. After the image is engraved into the wax, a positive plate is produced through stereotyping or electrotyping. This plate can be used with conventional letterpress equipment.
Cyanotype. The cyanotype (from Ancient Greek: κυάνεος, kyáneos 'dark blue' and τύπος, týpos 'mark, impression, type') is a slow-reacting, economical photographic printing formulation sensitive to a limited near ultraviolet and blue light spectrum, the range 300 nm to 400 nm known as UVA radiation. [1]