Epson 1400 Reference Manual

Page of 95
Toner cartridge
Model number:
Storage
temperature:
Storage humidity:
Shelf life:
Life:
SO51023
0 to 35° C (32 to 95° F)
15 to 85% RH
24 months after production
Up to 4000 pages under the following conditions:
Letter-size 
paper, continuous 
printing, and
5% print ratio.
The number of pages you can print with a toner cartridge varies
depending on the type of printing. If you print a few pages at a time or
print dense text exceeding the 5% print ratio, your cartridge may print
fewer pages. The 5% print ratio is equivalent to double-spaced standard
text.
You can increase the life of the toner cartridge by using toner saving
mode.
Technical Specifications  A-5