Print set up in the program

You need to start with photo glossy paper that's designed for an Epson printer. HP paper may not work well, and some other papers don't work either. Try some Epson paper, and that should work fine.
You can also try other paper settings, such as "transparency" or "matte paper", as the paper setting governs how much ink is laid down. I think getting the right paper is really what you need, though. Ink "puddling" is a common Epson complaint, and it's almost always the paper.

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Depending on the program you are using to print your gift certificates, try this-

1) Open the program and open the file you use for your gift certificate.
2) Click on 'Layout' then 'Page Set Up' (probably found in the top menu bar by the right side of, FILE.)
3) Select 'Landscape' and then select, 'Custom'.
4) Enter 5x7 for height and width.
5) Enter the information you need in the data field, (ie, name address, etc.)
6) Select, Print.
7) When the 'Print Manager' box opens, click on, 'Properties'.
8) Click on, 'Type' and choose, "Envelope'.
9) Click on, 'Size' and choose 5x7. - and click, OK.

Your printer should have a slide where the paper is inserted. Place one of the 5x7 cards in the slot just as you would an envelope and slide the slider until it is 'close' to the card but not directly against the card.

Click, 'Print'. The printer should recognize the card (due to its thickness) as an envelope and print it.

The difference in choosing the paper type will have an impact on how head squirts ink onto the media. For Epson printers, the best choice to fit the color is plain paper.However, to the maximum dpi (best photo or photo rpm), plain paper does not support.This can be overcome by adjusting the color management of the program that we use.Or convert to bitmap all objects (such as Corel Draw), or also in print as bitmap option.

Copied this from the specification on HP site.

It would appear not to take 5 x 7. It's the 7" is to small, 8.5 is the smallest.

Media sizes, std.
Letter, legal, executive, No. 10 envelopes, Monarch envelopes
Media sizes, custom
Tray 1, 2, 3: 3 x 5 to 8.5 x 14 in
Media types
Paper (plain, letterhead, prepunched, bond, color, rough, preprinted, recycled), HP Color Laser Glossy Photo Paper, HP Color Laser Glossy Brochure Paper, HP Color Laser Matte Brochure Paper, HP Color Laser Matte Photo & Imaging Paper, HP Color Laser Soft Gloss Presentation Paper, HP color laser transparencies, labels, envelopes, cardstock

Try to perform a print head alignment.

You need the driver setings on your pc, select the correct paper type or media type then select the size if this size is not available you can create a custome paper size one the driver but you must take into consideration on how thick is your paper you can set the media thicker setting all this option is available on the printing preference (windows) or print settings (mac).

hope this help

Sure. One of the papers is probably clay based (Shiny) and one is rag based (rough and dull). Clay based produces the most vibrant inkjet images and rag based produces the best laser printer images. I bet the two papers are different in composition. I see this all the time.

use the mpf tray. go to the machine press menu down arrow untll you get to tray settings. right arrow over till u get to paper type...then down arrow till you see paper size...right arrow again till u see tray 1...down arrow till you see mpf..right arrow till you see letter. Now that you are in the mfp section you can down arrow and you will see serveral selections I would keep it at letter. when you select it an * will appear next to letter. Then select menu and you and the printer is set. Now go to the print option in the program that you are using and when the dialog box to print opens select properties. go to paper quality the mpf should be selected in the tray souce. Now go down and you will see the advance button, click on that you will see Paper/Output make sure it says Paper Size and Letter is selected. Media Type should say Plain 1. If the invitations is on a heavier paper like card stock click the down arrow and select Covers 1 . If your paper is coated like matte finish photo paper select Coated 1. Now click ok. Do a test print and see if you get what you want. If not, let me know.--Deeva

the sensors cant see paper on the perforated part/side.
same goes for transparencies, the printer can't see it

Your printer supports the following media types:

Epson Bright White Paper
Epson Iron-on Cool Peel Transfer Paper
Epson Photo Paper Glossy
Epson Photo Quality Self-adhesive Sheets
Epson Premium Photo Paper Glossy
Epson Premium Photo Paper Semi-gloss
Epson Premium Presentation Paper Matte
Epson Premium Presentation Paper Matte Double-sided
Epson Presentation Paper Matte
Epson Ultra Premium Photo Paper Glossy