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B-16 Expression 636 Scanner Settings
The resolution that you use to scan an image (input resolution)
does not have to match the dots per inch of your printer (output
resolution). Input and output resolution are two quite different
measurements. Just follow the guidelines below.
Here’s how to calculate more precisely the required resolution
for grayscale or color on an electronic color printer or a printing
press:
1. Find out the lines per inch of the printing method. This is the
measurement of resolution for high quality image printing.
Do not confuse it with dots per inch, which is not an
equivalent measurement.
2. Multiply the lines per inch by two to find the best scanning
resolution. For example, for 175 lines per inch (a common
resolution for magazines and books), scan your image at
350 dpi (2 × 175 = 350).
For even smaller file sizes, try scanning at about 1.5 times the
lines per inch. This may cause little or no perceptible loss of
output quality.
Optimum scanning resolutions
Output device Line art Grayscale Color
Monochrome printer 300-600 80-170 —
Desktop or office
color printer
300-720 150-240 150-240
Printing press or
imagesetter
600-1200 150-350 150-350
Computer Screen 72 72 72