Epson GT-6500 EN - Manual (Page 38)

Scanning multiple shade documents for bi-level output
devices capable of black and white only
When you scan multiple shade documents and output them to devices
capable of expressing only black and white, use the following feature
settings for best results.
Data format 1 bit/pixel/color
Image correction Method appropriate to output device
Data processing
Yes
Scanning documents without multiple shades
When you scan line drawings, characters, logos, diagrams, etc., turn
all data and image processing off and scan the document. This allows
you to achieve the maximum contrast possible.
Data format 1 bit/pixel/color
Image correction Standard settings
Data processing
No
Scanning documents to obtain unprocessed data
If you want to perform all data processing using your application
software, with no processing by the scanner, use the following feature
settings for best results.
Color setting Page scanning
Data format 8 bits/pixel/color
Image correction Standard settings
Brightness
One step darker than standard
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