Removing The Perforated Margins; Storing Epson Photo Paper - Epson 400 User Manual

Removing the perforated margins

To remove the perforated margins, fold the paper back and
forth a few times along the perforations, then carefully tear
the margins off.
You may also remove the margins by cutting along the
perforations.

Storing EPSON Photo Paper

Return unused paper to the original package as soon as you
finish printing, and avoid storing it in places exposed to
high temperature, humidity, or direct sunlight.
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Printing on Special Paper