: This is the most common way to give paper a brownish, antique tinge. Brew a strong batch of black tea or coffee.

: Using diluted brown or yellow watercolor paints can create specific aged spots or a varied "foxing" effect common in old books. Darkroom Paper "Maturing"

Submerge the paper in a tray of the liquid for 3–10 minutes depending on the desired darkness.

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.

: Some photographers use "Old Brown" (used and oxidized lith developer) to "seed" a fresh batch, which helps stabilize the development process and produces more predictable "mature" tones.

: Using developer that has been used several times can lead to unique, softer tones, though it is often frustrating if you are aiming for standard high-quality blacks.

: To make the paper feel older, you can manually alter its texture:

: Carefully singe the edges with a lighter or candle to create a charred, "rescued from fire" look.