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Next, the plate is exposed to a positive transparency of an image. This transparency can be a continuous tone positive on film, but is most often made as a digital 'positive' (made in the same way as a digital negative) printed with an inkjet printer. The plate is then developed; for most types and brands of plates, this is done in water.
Inkjet printers designed for printing photos can produce much higher quality color images. [26] An in-depth comparison of inkjet and laser printers suggest that laser printers are the ideal choice for a high quality, volume printer, while inkjet printers tend to focus on large-format printers and household units.
Negative lithographic printing plate Agfa Advantage DL violet laser imagesetter with VPP68 plate processor. This compares with the older technology, computer-to-film (CTF), where the computer file is output onto a photographic film. This film is then used to make a printing plate, in a similar manner to a contact proof in darkroom photography.
The LightJet5000 large-format printer was introduced at PMA in 1996. The product produced continuous-tone photographic prints and Duratrans up to 50×50 inches. In 1997 a version capable of printing to a dimensional size limit of 50×100 inches was introduced. The Océ LightJet430 50" x 120" (image size) photo laser printer was introduced in 2000.
Transparencies can be printed using a variety of technologies. In the 1960s and 70s the GAF OZALID "projecto-viewfoil" used a diazo process to make a clear sheet framed in cardboard and protected by a rice paper cover. [1] In the 1980's laser printers or copiers could make foil sheets using standard xerographic processes. Specialist ...
Screen printing is a printing technique where a mesh is used to transfer ink (or dye) onto a substrate, except in areas made impermeable to the ink by a blocking stencil.A blade or squeegee is moved across the screen in a "flood stroke" to fill the open mesh apertures with ink, and a reverse stroke then causes the screen to touch the substrate momentarily along a line of contact.