Printouts Are Not What You Expected - Epson Stylus Color 660 Manual

If the paper is curled toward the printable side, flatten it or
curl it slightly toward the opposite side.
Remove each sheet from the output tray as it's printed,
especially if you're using transparencies.
If you're printing on glossy media or transparencies, place a
support sheet (or a sheet of plain paper) beneath the stack. Or
load one sheet at a time.
Run the Head Cleaning utility. Windows 95 or 98 users can
start the "<As_head.htm>Head Cleaning Utility" now.
Run the Print Head Alignment utility. Windows 95 or 98 users
can start the "<As_alig.htm>Print Head Alignment Utility"
now.
Ink may have leaked inside the printer; wipe the inside of the
printer with a soft, clean cloth.

Printouts Are Not What You Expected

If one of the following problems has occurred, try the solutions
listed for the problem.
-106