Photosensitivity balance

Characteristic curves of layers of color photographic material unbalanced by photosensitivity. H is the exposure, D is the optical density. A shift to the right corresponds to a lower photosensitivity

The photosensitivity balance of a color photographic material (or color photographic process) is a characteristic expressing the degree of correspondence of the photosensitivity values ​​of the three main layers of multilayer photographic material or color separation channels.

The value of the balance of photosensitivity is defined as the ratio of the maximum of three to the minimum photosensitivity. Their values ​​are determined from the characteristic curves of each of the layers.

Measured using light sources with a specific color temperature for a given material.

Imbalance of photosensitivity occurs:

• Due to violations of the manufacturing technology of color photographic material;
• Changes in the conditions for the manifestation of color photographic material;
• Due to long-term storage;

It manifests itself in the predominance of any light tone in the image.

Compensated for printing with corrective filters.