DIS Print Production & Prepress 2

Question 1

What is the purpose of 'color separation' in four-color offset printing?

Accepted Answer

Dividing a full-color image into individual CMYK channels so each can be imaged to a separate plate

Answer

Separating an image into RGB components for accurate monitor display

Answer

Isolating spot Pantone colors from process colors in a design file

Answer

Converting Pantone swatch values to web-safe hexadecimal equivalents

Question 2

What does GCR (Gray Component Replacement) accomplish in prepress color preparation?

Accepted Answer

Replacing equal CMY components that form neutral tones with black ink to reduce total ink coverage

Answer

A method of boosting gray tones in scanned photographic images

Answer

Converting RGB neutral gray values to named spot colors

Answer

Adjusting gamma curves in black-and-white image files

Question 3

What is the function of registration marks printed outside the trim area on press sheets?

Accepted Answer

Providing alignment targets so press operators can register all color plates to the same position

Answer

Indicating the output resolution (DPI) specified for the job

Answer

Defining the final trim and cut lines for bindery equipment

Answer

Identifying which Pantone spot colors are specified in the print job

Question 4

What is 'imposition' in a prepress and print production workflow?

Accepted Answer

Arranging multiple document pages on a press sheet so they read correctly after folding, cutting, and binding

Answer

Setting the output resolution and line screen frequency for a plate imager

Answer

Adding bleed, slug, and crop mark areas to individual document pages

Answer

Converting a document from RGB to CMYK color space before output

Question 5

How does stochastic (FM) screening differ from conventional AM halftone screening?

Accepted Answer

FM screening uses randomly placed dots of uniform size; AM screening uses regularly spaced dots of varying size

Answer

FM screening uses larger dots at higher frequencies than traditional AM screening

Answer

FM screening arranges dots in circular patterns instead of angled line screens

Answer

FM screening uses square dots while AM screening uses elliptical dots

Question 6

What is the purpose of 'soft proofing' in a digital color-managed workflow?

Accepted Answer

Simulating on a calibrated display how a document will appear when printed using a specific output ICC profile

Answer

Generating a low-resolution screen preview for remote client approval

Answer

Printing a draft copy on plain office paper to check layout before final output

Answer

Converting color images to grayscale to preview a black-and-white print version

Question 7

What does UCR (Under Color Removal) specifically target in CMYK image preparation?

Accepted Answer

Removing CMY ink in neutral shadow areas and replacing it with black to reduce total ink density

Answer

Eliminating colors that fall outside the printable gamut of the output device

Answer

Stripping under-saturated colors from color proofs before client presentation

Answer

Deleting unused color channels from layered image files to reduce file size