Redscale

In this technique, blue light exposes the layers containing cyan and magenta dyes, but the layer containing yellow dye is left unexposed due to the filter.

Depending on the type of film used, the resulting colors range from maroon, to red, to orange, to yellow.

Some people shooting large format color film would load the individual negatives backwards.

When redscale film is shot at the posted ASA the resulting photos are almost all red, over exposure allows light to reach the less sensitive green and blue layers of the film.

Exposures of 5 stops or more over posted speed can result in the red layer washing out completely and the resulting images appearing mostly yellow.