: Instead of using scissors, tear the edges by hand to remove straight factory lines. For a more dramatic look, you can carefully singe the edges with a lighter (after wetting the paper slightly to control the flame).
If your "paper" is a physical craft project, you can make new paper look mature and "vintage" using these common techniques: mature old babes
: Crumple the paper into a ball and then flatten it out to create realistic "age" creases before staining. : Instead of using scissors, tear the edges
: Brew a strong batch of coffee or tea. Submerge the paper for up to 10 minutes or use a spray bottle for a more uneven, mottled look. : Brew a strong batch of coffee or tea
: Examining artists like Mary Delany, who began creating her famous "Paper Mosaiks"—highly detailed botanical collages—at the age of 72 and continued until she was 88. Creative Paper Craft: Making "Aged" Paper