Developing paper to look "mature" or aged is a creative process often called "distressing" or "aging" paper. You can achieve this effect using common household items to mimic the natural yellowing, staining, and wear that occurs over decades. Methods to Age Paper
In traditional photography, "maturing" can also refer to the process, where a developer is intentionally allowed to "age" or oxidize to achieve specific high-contrast and colorful results. mature over
: Ball up the paper and flatten it back out to create realistic wrinkles. Developing paper to look "mature" or aged is