i found my answer on my own
no need to buy a key
just google "printer-model adjustment program" i.e "px660 adjustment program"
which is a program that epson service centers use and usally some people who working at epson service center publish them on the web
and for px660 you can download it...
Hi
i want to buy new printer for my office and i have few questions
1-i heard that if i use a water-based highlighter on dye ink printed paper the ink will smear, is that right? what about pigment ink printed paper? do pigment ink water resistant properties is comparable with laser printing...