What Is Sepia Tone?

The term, as a manifestation of black and white photos, has a kind of brown tone.

Brown tone

Right!

The term, as a manifestation of black and white photos, has a kind of brown tone.

Originally brown photographs were made with special medical printing film, which is characterized by a unique tea hue. In addition, after a period of time, the black and white prints will fade into brown tones. These cannot be clearly distinguished and are collectively referred to as brown tones.