Exploring lenticular Kodacolor

The use of colour in film remains one of the longest and richest currents in the history of motion pictures. From tinting to toning, filmmakers have tried several incredible techniques to introduce colour into moving images almost since the medium’s beginnings. One special process that developed after a few decades was Kodak Kodacolor, which utilized lenticular technology to create a three-tone colour representation. Only produced for four years from 1928-1932[1], the Archives is lucky to house some of these rare and special films.

Lenticular Kodacolor under 6.4x magnification. Photo by Jesse Cumming.

Looking directly at the film with a naked eye, it appears no different than regular black and white 16mm film. This is because the colour information is encoded into a black and white film: no coloured dyes are used.

A lenticular lens array (Roberts, 1992). Source: lenstar.org.

Diagram of a colour screen, showing how the filters were positioned in front of the camera lens. Source: Giant Squid Audio Lab.

The plastic base of the film, as opposed to typical acetate film stock of the period, was created with tiny lenses (called lenticules) embossed into it. When shooting, the film passes by the camera lens with the base (lenticules) facing toward the subject, and the emulsion (where the image is captured) facing away. This way, the light passes through the film’s lenticules before creating the image on the emulsion. The camera requires a special lens which splits the light into three separate bands of red, green, and blue, which are then captured in the lenticules.

Lenticular Film Projector. A special lens in this projector adds the red, green, and blue back to film shot on a lenticular base. Photo courtesy of the Museum of Vancouver.

Each frame of film contains many patches of information which each contain the red, green or blue part of the image for that area of the frame. This film requires a similar lens to add the red, green or blue patches back together (known as additive colour) and produce a colour image. Without this special lens the films can still be projected, though they will appear simply as a black and white film. The Museum of Vancouver has such a projector in their collection, seen above.

Our lenticular films, entitled Gardens at Aberthau (Reference code AM1470-: MI-58) and Children and animals at Aberthau in garden (Reference code AM1470-: MI-43) are part of the Colonel Victor Spencer family fonds. The Spencer family owned a home at 1750 Trimble Street in Vancouver, known as Aberthau. We have 69 amateur films shot by various members of the Spencer Family from the 1920s to the 1960s.

Using our microscope camera, we took some photos from “Gardens at Aberthau” to show the unique texture of Kodacolor film. Here it is under 10x magnification. The lenticules are barely visible. Photo by Jesse Cumming.

“Gardens at Aberthau” under 60x magnification. Bands of lenticules are clearly visible. Photo by Jesse Cumming.

 

“Gardens at Aberthau” under 200x magnification showing detail of the window. Photo by Jesse Cumming.

When it came time to digitize the films, we had the work done by Film Technology Company in Los Angeles, the only lab in North America still able to transfer lenticular film. In addition to the digitized copy, we also created a polyester colour negative as a preservation copy.

Polyester colour negative of [Gardens at Aberthau] on our light table.
Photo by Jesse Cumming.

Colour negative of “Gardens at Aberthau” under 10x magnification.
Photo by Jesse Cumming.

Both the original and colour reproduction live full time in our freezer to best preserve the film stock. Having ceased production almost 80 years ago, Kodacolor film is exceedingly rare and it isn’t guaranteed that there will always be the capabilities to transfer it. By creating a new negative and a digital copy, we are doing everything we can to ensure the films’ longevity. The video below is a digital transfer of Gardens at Aberthau (AM1470-: MI-58).
We’re always interested in acquiring more film documenting Vancouver’s past, even on complicated and rare formats such as lenticular Kodacolor. If you know of any film you think we might be interested in acquiring please do not hesitate to contact us.


[1] In 1942 Kodak began producing a still colour negative film also called Kodacolor, though it is unrelated to the earlier lenticular moving image film stock.
Back to article

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>