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SNAP Recommended Scanning Resolutions
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SNAP Recommended Scanning Resolutions: Contones
An output size of 100% is assumed. Scaling scanned images changes the effective resolution.
INPUT SCAN
(ppi) |
OUTPUT
IMAGE (lpi) |
INPUT SCAN
(ppi) |
OUTPUT
IMAGE (lpi) |
144 |
72 |
266 |
133 |
170 |
85 |
300 |
150 |
200 |
100 |
400 |
200 |
Gray balance in Prepress
To compensate for inherent printing ink contamination, areas intended to print neutral must be adjusted to CMY ratios that will yield neutral gray.
Examples of CMY neutrals:
SNAP Recommended Scanning Resolutions: Line Art
Scaling scanned images changes the effective resolution.
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Recommended Input Resolution
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Scanned Art |
Same as output resolution |
1200 dpi |
Higher resolution leads to larger files |
Line Art |
Same as output resolution |
800 dpi |
Thinner/finer lines may demand higher input resolution |
Line Drawings and Cartoons |
Same as output resolution |
800 dpi |
Thinner/finer lines may demand higher input resolution |
SNAP - Recommended Scanning Resolutions
All EPP output devices including proofers and imagesetters must be capable of producing a minimum of 142 gray steps.
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100% |
200 ppi |
125% |
250 ppi |
150% |
300 ppi |
175% |
350 ppi |
200% |
400 ppi |
300% |
600 ppi |
400% |
800 ppi |
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