Microtek ScanMaker 5 User's Guide download pdf (Page 196)

Basic Concepts E-9

The table below shows optimal resolution settings for most needs. MPR below

stands for “Match Printer's Resolution.”

Printer Type Line Art Grayscale Color

Inkjet (360 dpi) MPR 240 ppi 240 ppi

Laser (300 dpi) MPR 120-150 ppi 120-150 ppi

Laser (600 dpi) MPR 200-300 ppi 200 - 300 ppi

Dye-Sublimation MPR MPR MPR

Imagesetter MPR at least 300 ppi at least 300 ppi

(≤ 1200 ppi)

Remember that the higher the resolution, the larger your image file will be. For

instance, an 8.5" x 11" color photograph scanned at 75 ppi takes up about 1.6

megabytes (MB). Doubling resolution to 150 ppi will increase the file size four

times — to approximately 6.3MB! Going to 300 ppi will increase file size to

26.2MB.

What you need to do then is to select the lowest possible resolution that still

gives you good image quality in order to keep file sizes manageable.

The two images were scanned at different resolutions, but there isn't much

difference in the printed result. This is because all printers and presses have

their own maximum resolution. It's also because the final size is so small that

anything over 150 ppi is really unnecessary.

Comparison of images at different resolutions

300 ppi

150 ppi

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Microtek ScanMaker 5 User's Guide Page 196