One pack contains 3 different color rolls and give your different feeling when you print out.
How long will the printed material last?
The Sticky paper can last up to 20 years. As long as you avoid exposing the thermal paper to the sun, and the retention period will be longer.
How many pictures can be printed?
It can support up to 100 pictures for 1 roll. If the pictures sized 95x57mm / 3.75""x2.25 inches
Paper rolled upside down?
Actually you don't need worry about this point and feel reassured you still can use those rolls since no matter how the paper is placed, as long as there is a contact between the paper and the scroll wheel, it can be pulled out and printed.