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Printing Processes

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holden williams

on 14 February 2013

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Transcript of Printing Processes

Flexography Flexography (often abbreviated to flexo) is a form of printing process which utilizes a flexible relief plate. It is essentially a modern version of letterpress which can be used for printing on almost any type of substrate, including plastic, metallic films, cellophane, and paper. It is widely used for printing on the non-porous substrates required for various types of food packaging (it is also well suited for printing large areas of solid color). The Printing Processes By Holden Williams Rotogravure Rotogravure (Roto or Gravure for short) is a type of intaglio printing process; that is, it involves engraving the image onto an image carrier. In gravure printing, the image is engraved onto a cylinder because, like offset printing and flexography, it uses a rotary printing press. Once a staple of newspaper photo features, the rotogravure process is still used for commercial printing of magazines, postcards, and corrugated (cardboard) product packaging. http://en.wikipedia.org/wiki/Rotogravure http://en.wikipedia.org/wiki/Flexography Uses of Flexography Printing on Plastic
Acetate film
Brown paper
And more http://desktoppub.about.com/cs/printing/g/flexography.htm Advantages Is very useful for long term projects like
packaging and publication printing and
does it in high quality. Disadvantages Is very expensive and cant make last minute corrections without it being
expensive. http://www.digitalmarketing1.com/printingprocess.html Lithography Screen printing Screen printing is a printing technique that uses a woven mesh to support an ink-blocking stencil. The attached stencil forms open areas of mesh that transfer ink or other printable materials which can be pressed through the mesh as a sharp-edged image onto a substrate. A fill blade or squeegee is moved across the screen stencil, forcing or pumping ink into the mesh openings for transfer by capillary action during the squeegee stroke. Basically, it is the process of using a stencil to apply ink onto another material.
Screen printing is also a stencil method of print making in which a design is imposed on a screen of polyester or other fine mesh, with blank areas coated with an impermeable substance. Ink is forced into the mesh openings by the fill blade or squeegee and onto the printing surface during the squeegee stroke. It is also known as silkscreen, serigraphy, and serigraph printing. A number of screens can be used to produce a multicoloured image. http://en.wikipedia.org/wiki/Screen_printing Orientation to Graphic Communication, student edition Types of material on which printing is done Paper
Cloth Metal
Leather Advatages Good for short term quick projects. Disavantages Expensive and takes a long time to
do. Digital Modern printing methods such as laser and ink-jet printing are known as digital printing. In digital printing, an image is sent directly to the printer using digital files such as PDFs and those from graphics software such as Illustrator and InDesign. This eliminates the need for a printing plate, which is used in offset printing, which can save money and time.
Without the need to create a plate, digital printing has brought about fast turnaround times and printing on demand. Instead of having to print large, pre-determined runs, requests can be made for as little as one print. While offset printing still often results in slightly better quality prints, digital methods are being worked on at a fast rate to improve quality and lower costs. http://graphicdesign.about.com/od/printproductionglossary/g/digital_print.htm Advantages Higher quality, more efficient, easier than
printing plates, and saves money. Disadvantages None Uses Brochures
And more Unlike relief and intaglio printing where the image to be printed is raised above or sunk below the surface of the printing plate, in lithography the printing surface is flat with both image and non-image areas at the same level on the printing plate. Invented in 1798 by Alois Senefelder, lithography uses the fact that oil and water don't mix as the basis of the printing process. A flat stone such as limestone or a metal plate is treated so that the image area attracts oil-based inks and the wet non-image areas repel the oil-based inks. http://desktoppub.about.com/cs/printing/g/lithography.htm Advantages It is very fast
It does fast print runs
It is cheap
The images produced are clear and sharp Disavatages It cannot produced very high quality prints
- It cannot do small print runs so people who want to print in small numbers cannot.
- The materials are complex to use. http://wiki.answers.com/Q/What_are_the_advantages_and_disadvantages_of_lithography
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