4/10/11
Print definitions:
Substrate : any stock / material
Finishing: Process to finish job, e.g - Die cutting, folding etc
Showthrough: Ink printed on one side can be seen through the other side, usually determined by kind of substrate used.
Imposition: The arrangement of printed publication pages , in the sequence and position they will appear when printed. Before being cut and binded.
Duplexing: The bonding of two substrates to form one.Allows a stock to have a range of textures and finishes.
Paper types
Newsprint: Short life span, cheap, used in newspapers and comics
Antique: roughest finish offered on offset paper, used to add texture to publications such as annual reports.
Uncoated woodfree: Largest printing and writing paper category - e.g office paper and photocopy paper
Mechanical: Produced using wood pulp, for short term use, eg newspaper
Art board: Uncoated board, cover stock.
Art: High quality paper, good printing surface, especially for half tones and where detail is important. Colour printing, magazines.
Cast coated: High - gloss finish
Chromo: Waterproof coating on one side, good for embossing. Used for labels, wrappings and covers.
Cartridge: Thick white paper used for pencil and ink drawings.
Grey board: Lined or unlined board made from waste paper. Packaging material.
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Printing types
Lithography:
Uses metal plate to transfer a design via a rubber blanket to the stock. Typically four colour (CMYK)
Wash print:
Allows most delicate of colours to be applyed to a substrate. Uses highly diluted ink to produce a flat colour which is subtle.
Silk screen:
Imposes an image onto a substrate by forcing ink through a screen has has a design. Slow process, high quality.
Letterpress:
Relief printing in which an inked raised surface is forced against a substrate. First form of commercial printing. Unique in its slight indentations through varying prints.
Hot metal printing:
The process of casting type in lines of molten metal.
Thermography:
Used to produce raised letters on substrates. Powder dispensed onto sheet of printed paper, the powder sticks, when pushed through an oven fuses with substrate and leaves a raised surface.
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