Sepia toning

Photographs with sepia property are maintained over the entire image area in the yellowish- brownish color sepia and have a reduced color gamut. Sepia-Tone Photography arise in several ways:

• With old photographic prints of the black portion by UV radiation is brownish and white on the paper with the time yellowish- cream. Most deductions that are 60 years and older, show this sepia characteristic.
• For black and white prints sepia tints can also be caused by certain chemical dye baths, for example, on the basis of thiourea and sodium hydroxide are produced.
• Today, with digital cameras is usually a corresponding mode available. Many image editing programs also allow to apply this effect in hindsight.
• In printed images, such as in offset printing, a good sepia effect can be achieved by a black and white image is also printed with a spot color, the so-called duplex printing

Example

Below is the same digital image in full color, faded to see with sepia and grayscale:

Faded

Sepia Effect

Grayscale