printing processes unit 6 in orange book. essential question how are different substrates printed?...
TRANSCRIPT
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Printing Processes
Unit 6 In Orange Book
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Essential Question
How are different substrates printed? When would I utilize the various methods?
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Main Types of Printing Processes
Gravure Offset Letterpress Digital Specialty
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Gravure
Also known as Intaglio Printing A printing process in which the image
is etched below the surface of the printing plate.
2nd oldest form of printing Before offset was used to print color in
newspapers
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Gravure (continued)
Used primarily for large runs <100,000
Used to print magazines, glossy paper Cheapest form of printing, but ONLY for
LONG runs Plates are very expensive to make Plate last a LONG time
Doctor Blade – a thin metal blade that clears excess ink from the non-image area of a gravure plate.
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Gravure (continued)
Best way to print pictures! Best color Best shading Best tone
Pre-Press is the most expensive Plate, set-up, etc expensive Proofing is difficult and time consuming Takes skilled press operator
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Gravure Press
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Offset Lithography
http://americanart.si.edu/collections/exhibits/posters/process.html
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Offset Lithography
Offset Lithography Based on the concept that grease
and water do not mix Grease = ink Water = fountain solution
Planography - The process of printing from a flat surface with the image and non-image areas kept separated by chemistry.
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Offset Lithography (continued)
Newest, but most commonly used form of printing.
Used in short to medium runs (500 – 100,000)
The image is first transferred from a plate to a blanket, then from the blanket to the substrate.
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Offset Lithography (continued)
Able to print on a variety of substrates Different sizes Different weights of paper BUT…. All substrates must be FLAT!
Planography – process of printing on a flat surface.
Press is easy to learn and easy to operate – but it does take skill!
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Offset Lithography (continued)
Typically the most economical form of printing (inexpensive)
Presses are typically “small” and are affordable
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Offset Lithography Presses
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Offset Lithography Terms
Hydrophilic – Water Loving Non-image area of the printing plate
Hydrophobic – Water Hating Image area of the printing plate
Plate is coated with water 1st, then ink
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Offset Lithography
http://americanart.si.edu/collections/exhibits/posters/process.html
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Offset Lithography
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Letter Press
Also known as Relief Printing Oldest form of printing The process of printing from a raised surface
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Letter Press (continued)
Hot Type Moveable type that is formed using hot
molten metal to cast or form the letters.
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Letter Press (continued)
Images are reversed (wrong reading)
Today used: Individual numbering
(i.e.: tickets, invoice forms, etc)
Flexography used to print boxes, packages
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Digital Printing
Type of printing technology that receives electronic files (from computer) and uses spots (or dots) for reproduction.
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Specialty Printing
Screen Printing Laser Printing Ink Jet (to include
wide format) Copying Dye Sublimation
Pad Printing Engraving Etching Thermography Etc.
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Screen Printing
Objects printed using screen printing: Clothing…. T-Shirts! Signs Small electronic objects: phone covers,
mother boards, cell phone components Some packaging Some vehicle graphics
Logos on big trucks
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Screen Printing Printing method in which the image is
transferred to the surface to be printed by means of ink squeezed by a squeegee through a stenciled fabric or metal wire screen stretched over a frame.
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Ink Jet Printing
Method of printing by spraying droplets of ink through computer-controlled nozzles
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Pad Printing
Used to print irregular shaped objects: Golf balls Pens/Pencils Cups
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Web vs. Sheet
Web Fed Press: Printing press that prints from a roll of paper
Sheet Fed Press: Printing Press that prints from cut sheets of paper
Web Fed
Sheet Fed
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Perfecting Press
Perfecting Press – Prints on both sides of the paper with one pass.