Final Exam Flashcards
Relief Printing
- Flexographic or letterpress
- raised rubber, plastic, wood or metal
- Plastic Bags and six uses (separate card)
- Johann Guttenberg, 1450
Intaglio Printing
- Roto Gravure
- Sunken Cylinder
- More than one million impressions, high quality magazines, packaging, fake wood
- Karl Kleach, 1875
Screen Printing
- Silk Screen/Seriography
- Stencil
- T-shirts, irregularly shaped objects
- Created in the orient, 1300’s
Lithographic Printing
- Offset/”Stone writing”
- Uses a flat plate that one part like H2O and ink
- Business cards, memo pads, textbooks
- Alois Senefelder, 1798
Electrostatic
- Digital/non-impact
- Drum that is positively charged, negatively charged ink
- Xerox, quick copy
- Chester Carlson, 1937
Printer’s Measurements
72 Point = 1 Inch
6 Picas = 1 Inch
12 points = 1 Pica
Uses for Printer’s Measurements
Inches are for page dimensions
Picas are for line length
Points are for type size
Film Structure
1) Anti-halationon Backing
2) Base + order of chemical development
3) Emulsion Silver Halides
Emulsion + Order of Chemical Development
- Developer (Base)
- Step Bath (Acid)
- Fix (Hardens)
- Wash at 68F or 20C
VDP
Variable Data Printing
Line Copy
Composed entirely of lines
ex. sketches
Continuous Tone Copy
Consists of images in a variety of tones
ex. photograph
Halftone Copy
A reproduction of continuous tone color in magazine or book
Halftone Screen
Uses dpi, lpi, ppi. For continuous color
Tint Screen
A tint that breaks solid areas into uniform series of dots. % of dotes for line copy.
Lithographic Plates
Consist of hydrophilic (accepts water) and hydrophobic areas (Repels water and accepts ink)
CTP plates
Computer to Plate (used in lab for notepads)
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Gripper Margin
Press Overview
1) Feed
2) Registration
3) Print Unit
4) Delivery
Types of Cylinders of Offset Presses
1) Plate: Right reading
2) Blanket: soft rubber, wrong reading
3) Impression: Metal
Principle of Offset
Water and ink don’t mix
Duplicators
Any offset lithographic machine that can feed a maximum of 11x17 inches and minimum of 3x5. They can print 5,000 to 10,000 impressions per hour.
True Press
Is an 4-unit press and can feed a sheet size of 54x77 and a minimum sheet size of 11x17. Much larger unit
pH Scale
Metric scale that shows how acidic (14) or alkaline (0, vinegar) )substance are. It stand for the potential of hydrogen.
Successive Feeder (Gap)
Mechanical fingers pick up one sheet from the top of the pile and direct it into the registration unit
Stream Feeder (Overlap)
Overlaps sheets on the registration board and slows the rate of sheet movement significantly