G7 G7 ICC Profile Creation & Color Management Systems 2 — Questions and Answers
Question 1: What is a 'device link profile' and when is it preferred over a standard ICC output profile in G7 workflows?
- A profile connecting two output devices directly, preferred when converting between two CMYK print conditions to preserve black channel (Correct answer)
- A profile used to link cameras to displays
- A profile that connects analog and digital devices
- A profile used only for wide-gamut displays
Correct answer: A profile connecting two output devices directly, preferred when converting between two CMYK print conditions to preserve black channel
A device link profile encodes a direct CMYK-to-CMYK conversion, preserving the black channel and avoiding a round-trip through PCS, making it ideal for reprinting content from one CMYK condition to another.
Question 2: Which measurement condition defined by ISO 13655 is now required for ICC profile builds under M-series standards to handle OBA effects?
- M0 (no UV filter)
- M1 (UV-included, D50 illuminant) (Correct answer)
- M2 (UV-excluded)
- M3 (polarized)
Correct answer: M1 (UV-included, D50 illuminant)
M1 measurement condition simulates D50 illuminant including UV content, providing consistent measurements of substrates with optical brightening agents for accurate ICC profiles.
Question 3: In soft proofing for G7, what does 'simulate paper color' option do in Adobe Photoshop?
- Converts the image to the paper's color space
- Adjusts the display to simulate the paper white of the chosen output profile, showing the actual appearance on press (Correct answer)
- Adds a paper texture overlay to the screen
- Converts the file to Lab mode for device-independent display
Correct answer: Adjusts the display to simulate the paper white of the chosen output profile, showing the actual appearance on press
'Simulate paper color' adjusts the monitor's white point simulation to match the paper white defined in the output ICC profile, showing how the image will truly appear on press.
Question 4: What is 'black point compensation' (BPC) and when should it be used in ICC-based color conversions for G7?
- It sets black ink to maximum density; always use it
- It maps the darkest point of the source to the darkest point of the destination, preventing shadow clipping; use with perceptual or relative colorimetric (Correct answer)
- It removes black channel from the conversion; use for RGB workflows only
- It increases GCR to maximize black ink usage; use for CMYK to CMYK
Correct answer: It maps the darkest point of the source to the darkest point of the destination, preventing shadow clipping; use with perceptual or relative colorimetric
BPC mathematically maps the source black point to the destination black point, preventing shadow tones from being clipped when the source has deeper blacks than the destination.
Question 5: Which G7-related organization maintains the GRACoL and SWOP characterization data used as ICC profile aims in North America?
- ISO
- FOGRA
- IDEAlliance (Correct answer)
- ICC Consortium
Correct answer: IDEAlliance
IDEAlliance (now Printing United Alliance) maintains GRACoL and SWOP characterization datasets and associated G7 certification programs for North American printing.
Question 6: What does 'total area coverage' (TAC) or 'total ink limit' control in an ICC output profile build?
- The maximum percentage of any single ink channel
- The maximum combined CMYK ink percentage allowed on any given pixel to prevent drying and offsetting problems (Correct answer)
- The total number of ink passes in a multi-pass print system
- The coverage area of the printed sheet measured in square inches
Correct answer: The maximum combined CMYK ink percentage allowed on any given pixel to prevent drying and offsetting problems
TAC (Total Area Coverage) sets the maximum combined CMYK ink percentage per pixel to prevent ink-related problems like slow drying, offsetting, and show-through on press.
G7 G7 ICC Profile Creation & Color Management Systems 2
What is a 'device link profile' and when is it preferred over a standard ICC output profile in G7 workflows?