View source for Redscale

{{Short description|Technique in film-based photography}}
{{for|the plant|Atriplex rosea}}
[[File:InternoCimiteroMonumentaleRedsce.jpg|thumb|Redscale photo taken at the [[Cimitero Monumentale di Milano]]]]
{{Alternative photography}}
'''Redscale''' is a technique of shooting [[photographic film]] where the film is exposed from the wrong side, i.e. the emulsion is exposed through the base of the film. Normally, this is done by winding the film upside-down into an empty film canister. The name "redscale" comes because there is a strong color shift to red due to the red-sensitive layer of the film being exposed first, rather than last (the red layer is normally the bottom layer in [[C-41 process|C-41]] color print film). All layers are sensitive to blue light, so normally the blue layer is on top, followed by a filter. 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. [[E-6 process|E-6]] (color slide) film has also been used for this technique.

Depending on the type of film used, the resulting colors range from maroon, to red, to orange, to yellow. The amount of over exposure determines the intensity of the red. When redscale film is shot at the posted [[Film speed|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.

==History==
The technique seems to have been discovered accidentally. Some people shooting large format color film would load the individual negatives backwards. This phenomenon is likely as old as color film itself. Lomography Redscale was the first purpose-made redscale film, which was available since at least 2010.  Today, Lomography Redscale film is available in 35mm, 120, and 110 formats.<ref>{{Cite web |date=2023-06-11 |title=Lomography All Film |url=https://shop.lomography.com/us/film/all |access-date=2023-06-11 |website=Lomography Shop |language=en}}</ref>

The technique is considered by some to be part of the [[lo-fi photography]] movement, along with use of [[toy camera]]s, [[pinhole camera]]s, [[instant camera]]s, and [[sprocket hole photography]].

==Gallery==
<gallery>
File:Redscale film landscape photograph at 7 different exposure settings.jpg|A scene shot with redscale film at 7 different exposure settings
File:Lomography Redscale camera film.jpg|Ready-made Redscale 35mm film
File:Redscale film load in a Bilora Bella (5628729973).jpg|Normal film loaded backwards in a 35mm camera to achieve the redscale effect
File:Dandelion (1).jpg|An overexposed redscale image
File:Blue Sky - City Palace - Udaipur.jpg|Redscale photo of clear sky
File:Mh Franks Light Leak (79882567).jpeg|A redscale image with a [[light leak]] allowing sufficient exposure for blue colours to appear
File:Lomography Redscale XR.jpg|Underexposed image taken with Lomography Redscale XR film
</gallery>

== See also ==
* [[Cross processing]]

== References ==
<references />
== External links ==
{{commons category|Redscale photographs}}
* [http://fmphotocourses.blogspot.com/2007/07/how-to-make-redscale-film.html Instructions on how to make redscale film]
* [https://web.archive.org/web/20071202092009/http://alspix.blog.co.uk/2006/09/12/title~1120759 Redscale Technique]
* [https://www.flickr.com/groups/redscale/ Flickr 'redscale' group] - examples and discussion
* {{usurped|1=[https://web.archive.org/web/20110321004025/http://cakpii.co.uk/make-your-own-redscale-pinhole-camera/ Make Your Own RedScale Pinhole Camera]}}
* [http://www.danimalweb.co.uk/blog/2011/01/18/an-introduction-to-redscale-film/ An introduction to Redscale film]
* [http://www.creativecloseup.com/fiery-redscale-photo-effect-from-hell-photoshop-tutorial/ Recreate the Redscale film effect in Photoshop]

{{Photography}}

[[Category:Photographic processes]]
[[Category:Photographic techniques]]