Why use Epson Paper

Unfortunately, no Win7 drivers exist for this printer.
You are better off running a Win98 or XP virtual machine on Win7 (like in VMWare), and installing your printer that way. There's no guarantee that would work, but it's at least one more thing to try.
Good Luck!

You need to select the correct Printer Profile for the type of paper you are using. If you are using non-Epson paper, you need to download the ICC Profile from the paper mfg. website.

You also need to check if the paper is comparable to an Epson paper that the printer supports. If the paper your using is not comparable to any Epson paper the printer supports then you might want to try using another kind of paper. Epson prefers Epson Paper. You can also try any non-Epson paper as long as it is comparable to any Epson paper the printer supports. Try to go to their website and look at the printer's specifications. It lists all type of paper the printer supports.

the reaction of the photo chemicals that are on the paper cannot be guaranteed by the printer manufacturer as they have no knowledge of its composition.

3rd party photo paper manufacturers have better compatibility results.

epson for epson, kodak for kodak, hp for hp

it may damage the printer if you do so...
Printer manufacturers create certain technologies with their ink so that it binds specifically with their papers...
meaning to say, that when you print with epson ink, use epson paper to guarantee the quality of your prints... these manufacturers do not test their products with other brands of paper. You can certainly try it but if it fails, theres nothing that the manufacturer can do to make their printer work on papers or media that is not within their supported list of papers.

There are epson ink compatible cartridges in the market that are less expensive but have good quality. Please look for other compatible brands which good quality guaranteed, try those compatible brands which are more popular.