G7 G7 Print Production & Substrate Management 1 — Questions and Answers
Question 1: What substrate property most directly affects how ink absorbs and affects the final G7-calibrated color output?
- Paper brightness
- Paper opacity
- Surface absorbency and coating type (Correct answer)
- Basis weight
Correct answer: Surface absorbency and coating type
Surface absorbency and coating type determine ink holdout, which directly impacts dot gain and color density in G7-calibrated output.
Question 2: In G7 methodology, what term describes the increase in dot size from file value to printed output?
- Dot spread
- Tonal value increase (TVI) (Correct answer)
- Ink trap
- Color gamut compression
Correct answer: Tonal value increase (TVI)
Tonal value increase (TVI), also called dot gain, measures the percentage difference between the intended halftone dot size and the actual printed dot size.
Question 3: Which G7 calibration target is used to evaluate gray balance and achieve neutral print characterization?
- IT8.7/4 target
- P2P25 target (Correct answer)
- IDEAlliance ISO 12647-2 target
- UGRA/FOGRA media wedge
Correct answer: P2P25 target
The P2P25 (Process to Press) target contains CMY patches specifically designed to evaluate gray balance for G7 calibration.
Question 4: When printing on an uncoated substrate for G7 compliance, which characterization dataset is typically the reference?
- GRACoL 2013 Coated
- SWOP 2013 C3
- SWOP 2013 C5 (Uncoated) (Correct answer)
- Fogra39
Correct answer: SWOP 2013 C5 (Uncoated)
SWOP 2013 C5 is the industry reference characterization data for uncoated substrates in North American G7 workflows.
Question 5: What is the primary purpose of a G7 Targeted press run as opposed to a G7 Grayscale calibration?
- To match a specific reference printing condition's full color appearance (Correct answer)
- To reduce ink consumption on press
- To improve registration accuracy
- To optimize screen ruling for the substrate
Correct answer: To match a specific reference printing condition's full color appearance
G7 Targeted calibration aligns press output to the full color appearance of a specific characterization dataset, not just neutral gray balance.
Question 6: Which measurement geometry is recommended by G7 specifications for measuring solid ink densities on press?
- 0°/45° geometry
- 45°/0° geometry (Correct answer)
- Sphere (diffuse) geometry
- Polarized geometry
Correct answer: 45°/0° geometry
G7 and most printing standards recommend 45°/0° measurement geometry for reflectance measurements of printed substrates.
G7 G7 Print Production & Substrate Management 1
What substrate property most directly affects how ink absorbs and affects the final G7-calibrated color output?