Redscale

Redscale [ ɹɛdskeɪl ] is a technique of analog photography, in which the used film is exposed from the back. Depending on the exposure time and film the photos are by little yellowish reddish clear up.

Redscale films can be prepared by hand by rewinding, but also the purchase of prefabricated Redscale movies is possible.

Background

Color negative films consist of three color- sensitized layers. In normal use, the incident light is first incident freely on the sensitized for blue layer, then click the corresponding green - and red- sensitized layer. However, in silver-based film layers Despite color sensitization remains a residual sensitivity to blue light. Therefore, the blue portion of the light before the arrival of green - and red- sensitized layer is filtered out in each case with a yellow filter and red filter.

In use, the reverse light passes thus only these two filters before it is incident on the blue- sensitized layer. This in turn is not very pronounced, while red and yellow predominate.

By varying the exposure time control of this effect is possible. Short exposure times typically produce strong red-yellow- stichige photos while long exposure times result in a slight yellow tinge. However Exact behaviors are strongly influenced by the film being used.

History

It is likely that the appearance of Redscale effect due to accidental false insertion of the film used (most likely in sheet film ) is already known a long time. However, as a conscious, artistic means the Redscale Photography gained a certain popularity, especially in the wake of the Lomography in the last decades.