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29 Cards in this Set
- Front
- Back
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End Use Categories
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Fine paper made for printing and writing
Industrial paper made for wrapping and packaging Sanitary paper made for cleaning and personal hygiene |
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Method of printing categories
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Sheet papers for sheet-fed presses
Web papers for web presses |
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Pulp Content Categores
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Groundwood mad from mechanical pulp that has impurities (used for newspapers and general news magazines)
Free sheet mad from chemical pulp with the impurities washed and bleached away (used for most commercial printing jobs) |
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Five major Grades of printing paper
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Bond,
Text, Un-coated book, Coated book, Cover |
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Lithography
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"Writing in stones"; Carved image into stones and pressed inked stones into paper
Water kept non-image areas clean of the oily ink |
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Offset-on press
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Ink offsets from plate to rubber blanket then from blanket to paper
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Press Components (4 Units)
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Feeding Unit, Inking Unite, Printing Unit, Delivery Unit
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Feeding Unit
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Feeds paper into the press; grippers hold paper up to about 3/8" from edge (this area cannot be printed on)
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Inking Unit
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A reservoir containing ink
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Printing Unit
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A series of rollers and cylinders that transfer ink to paper
one or more printing units, one for each color |
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Delivery Unit
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Removes paper from the printed and into a pile
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Types of Presses (2 types)
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Sheetfed, and Web
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Sheetfed-paper
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Feeding into the press has already been cut down
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Web
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Paper feeding into the press comes off a roll and is cut into sheets after printing
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Perfecting Press
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Prints both sides of paper during same pass through machine; some sheetfed and most web presses are perfecting
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Web-break
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When paper from the roll tears while passing through press
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Advantages of Offsets
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Fast and inexpensive
Sharp images and good quality Various machine sizes and abilities |
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Moire Patter
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Undesireable pattern when halftones and screens are and with improperly aligned screens
Also occurs when pattern (such as plaid) in photo interference with a halftone pattern |
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Hickies
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Tiny flaws on final print, look like tiny white donuts
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Set-off
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Wet ink transferring ont the back of another image
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Scumming
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Streak on tinge of ink
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Print on demand
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All digital workflow cuts down on time
No Plates Lower unit costs on short runs |
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Ink-Jet/Large Format
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Personalized pre printed pieces
Large, single copy jobs (posters, banners, etc) |
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Flexography
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Soft plastic plates print directly on substrate
Works well for rough and unusual materials (Cardboard, fabric, wallpaper, milk cartons, wrappers, grocery bags, labels, cereal boxes, packaging) Print method of choice for the packaging industry |
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Letter Press
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Developed by Johannes Gutenberg in 15th century Germany
Formed individual characters made out of lead |
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Relief Printing
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characters on teh plate are higher than the material surrounding them
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Screen
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Most simple of all printing processes: screen stencil, ink, and squeegee
Fabric, signs, bottles, balloons, decals, sports equipment Best option for short runs (less than 200) Highly opaque ink (30x thicker than lithography) Slow in printing and drying |
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Gravure
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A diamond stylus engraves millions of tiny ink wells into cylinders
Cylinders are mounted on a web press Best for long runs (millions) |
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Engraving
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Images are cut (engraved) into thick metal plates
currency and stock certificates sharpest image quality of any printing method |
