Printing and printing, which is easier to fade and which lasts longer?

It is difficult to generalize, depending on what materials are used, manufacturing process and how to maintain them.

The two main causes of discoloration are oxidation and sun exposure, and the PH value of paper is also one of the factors affecting discoloration.

As long as you don't often expose yourself to strong light and coat the surface with a protective layer to isolate the air, the printed pictures can be preserved for a long time.

Relatively speaking, the shelf life of black-and-white pictures is longer than that of color pictures, because colored raw materials are more prone to oxidation and photosynthesis.