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GPS 1500 > Exam 2 > Flashcards

Exam 2 Flashcards

1
Q

Flat

A

The assembled masking sheet with pieces of film attached. Used to make a plate.

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2
Q

Masking Sheet

A

A sheet of material that blocks light and is used in the negative stripping process.

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3
Q

Actinic Light

A

Exposes emulsion to blue light and ultraviolet light.

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4
Q

Visual Spectrum

A

The wavelengths that stimulate our optic nerves comprise the visible spectrum. The wavelengths range from 400-700 millimicrons (mu).

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5
Q

Imposition

A

Refers to placing images in the correct positions on the printing plate so they print in the desired location on the final pretend sheet.

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6
Q

3 Imposition Factors

A

1) The design of the printed piece
2) The type and size of the press to be used
3) Type of paper or substance

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7
Q

PIS

A

Simplest form of printing, one side imposition

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8
Q

Sheetwise Imposition

A

Two printing plates are used in order to print one image on the front of the material and a different image on the back of the material.

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9
Q

Ganged Imposition

A

This is when a variety of jobs are printed on the same sheet and then cut because their size is much smaller than what the printer can print. This can do 2up, 3up and 4up.

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10
Q

Work-and-Turn Imposition

A

Utilizes on plate to print on both sides of a single piece of paper. The first sheet is printed on one side, the pile is turned over and the sheet is fed through the press again. One plate, two sides, two up.

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11
Q

Signature

A

A large sheet that is printed, folded and then trimmed to form a portion of a book or magazine.

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12
Q

Gripper Margin

A

Signified by the XXX and is the edge that the press with grab the sheet (plate) to start with, i.e: the side that will go into the press first.

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13
Q

pH Scale

A

Metric scale that shows how acidic (14) or alkaline (0, vinegar) )substance are. It stand for the potential of hydrogen.

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14
Q

Proofing

A

The approval that is received from the customer for the job

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15
Q

Press Proofs

A

Utilize the same type of ink and paper as the final job

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16
Q

Photomechanical Proofs

A

Require no large investment in special proofing equipment and generally use existing platemaking equipment.

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17
Q

Color Proofs

A
  • Transparent Color Proofs: are generally formed from separate sheets of clear-based plastic.
  • Opaque Color Proofs: are generally prepared by adhering, exposing and developing color emulsion on a special slid-based sheet successively.
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18
Q

To View Color Proofs Accurately

A

Utilize 5,000 K temperature emitted from an artificial source.

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19
Q

Hickey

A

Results from a linty or poorly coated paper, but it is more commonly a results from ink that is too tacky.

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20
Q

Smashed Blanket

A

Occurs when too many materials are pushed through a press and indent on the printing press blanket (plate)

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21
Q

Glazed Blanket

A

Cased by improper cleaning and causes the blanket’s pores to fill wit ink, ink solvent and gum.

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22
Q

Bindery

A

The most dangerous area

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23
Q

Cutter

A

Guillotine Cutter

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24
Q

Padding Compound

A

Two thin coats are needed (used for the memo pads)

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25
Scumming
Occurs when the non image area accepts ink
26
Fanning the Paper
Removes the static electricity
27
Set-Off
An image that is printed on the back of the press sheet due to the weight
28
Perfecting Press
Prints simultaneously on both sides of the press sheet
29
Duplicator
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.
30
Press
Is an 4-unit press and can feed a sheet size of 54x77 and a minimum sheet size of 11x17. Much larger unit
31
Additive Primary Colors
RGB (Need light)
32
Subtractive Primary Colors
CYMK (Need white paper)
33
Roll Fed
AKA Web fed
34
Sheet fed
AKA pile fed
35
Successive Sheet-Feeder
Mechanical fingers pick up one sheet from the top of the pile and direct it into the registration unit
36
Stream Feeder
Overlaps sheets on the registration board and slows the rate of sheet movement significantly
37
Sucker Feet
Small vacuum tubes that grab the floating top sheet and send it down the registration board where the registration unit takes over
38
Air Blast
Separates the top sheet from the pile through air
39
Registration
The process of controlling and directing a press sheet as it enters the printing unit
40
Ink System
Fountain Rollers: Holds a pool of ink and controls how much enters the inking system Ductor: A roller that flaps back and forth between the fountain roller and the distribution roller Distributor: Spread the ink to a uniform layer before placing it on the plate Oscillating Roller: rotate and move side to side and up and down before going to the form rollers Form rollers: The rollers that ink the plate
41
Dampening System
Direct, indirect and waterless
42
Delivery System
Gravity delivery: is the simpler or less dependable of the two designs Chan Gripper Delivery: the most popular delivery unit; the press sheet is pulled through the printing and delivery unit to a different set of grippers on the chain of the delivery unit.
43
Entire System
1) Ink Roller 2) Dampening Rollers 3) Plate Cylinder 4) Blanket Cylinder 5) Impression Cylinder 6) Feeder 7) Delivery
44
Continuous Tone Photography
An image that consists of a variety of shades of colors
45
Halfton Photography
A continuous tone photograph reproduced in a magazine or book that consists of dense series of dots.
46
Light
Electromagnetic radiation measured in wavelengths
47
Color Sensitivity
Blue Sensitive: Reacts to only the blue end of the spectrum Orthochromatic: Is sensitive to all portions of the visible spectrum except red Panchromatic: sensitive to all visible colors and is approximately sensitive to the human eye.
48
Film Structure
1) Anti-halationon Backing 2) Base 3) Emulsion
49
Process Camera Formula
Shutter Speed: Time of Lens Opening Aperture: Size of Lens Opening F/Stop system: The ratio of the focal length/diameter of the aperture
50
Step Tablet
AKA as a grey scale represents densities from .00 to 1.65
51
Densitometer
Measures density
52
Reflection Densitometer
Measures the density f opaque materials
53
Transmission Densitometer
Measures the density of transmissive materials
54
Lithography
Stone Writing, Alois Senefelder
55
Graining
Chemical: uses acid to etch parts of the stone through anodizing Mechanical: Placing two rotating tub filled with steel ball bearings, water and some abrasive material.
56
Plate
Image carrier, flat and uniform thickness
57
Base
Paper, plastic or metal
58
Coating
+ or - additive or subtractive
59
Linen Tester
A magnifying glass that can detect what type of printing method was used to create a specific material
60
Non-image area
Hydrophilic
61
Image area
Hydrophobic
62
Press Overview
1) Feeder 2) Registration 3) Printing Unit 4) Delivery
63
Types of Press Configurations
1) Platen 2) Flatbed Cylinder 3) Rotary
64
Areas of Continuous-Tone Print
1) Highlight: Bright parts 2) Mid-tones: Greys 3) Shadows: Dark Areas

GPS 1500 (3 decks)

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