HP Deskjet 5850 Color Inkjet Printer - Manual (Page 169)

storing and handling photo paper
Follow these instructions to maintain the quality of your HP brand photo paper.
storage
●
Keep unused photo paper in a resealable plastic bag, in the box in which it was
originally packaged. Store the packaged photo paper on a flat surface in a cool
place.
●
When you are ready to print, remove only the paper that you plan to use
immediately. When you have finished printing, return any unused photo paper
to the plastic bag.
●
Do not leave unused photo paper in the printer's paper tray. The paper may
start to curl, which can reduce the quality of your photographs.
handling
●
Always hold photo paper by the edges. Fingerprints on photo paper can reduce
print quality.
●
If the corners of the photo paper curl more than 10 mm or 3/8 inch, flatten the
paper by putting it in the resealable storage bag, then rolling the bag on a
table edge until the paper is flat.
Photo paper should be flat before printing.