Canon E3100 Series Online Manual page 227

Uneven or Streaked Colors
If Printed Paper Has Been Discolored
Colors may fade with time if the printed paper is left for a long period of time.
After printing, dry the paper sufficiently, avoid high temperatures, high humidity, and direct sunlight, and
store or display indoors at room temperature and normal humidity.
To avoid direct exposure to air, we recommend that you store the paper in an album, plastic folder, photo
frame, etc.
227