View Full Version : Claudia Wornum + ortho litho + RA4

Mustafa Umut Sarac
2-Jul-2008, 07:11
I am interested in Claudia Wornum process and I read she uses ortho litho film 6 x 10 inch sometimes and Sabattier Effect and RA 4 chemistry .
Can you please tell me where can I find ortho litho film , is it ortho and litho or ortho litho ? I think his pictures are very sharp .
What about RA 4 Chemistry ? I did not know it . And Sabbattier Process ? When , how and how much ?

Best ,

Mustafa Umut Sarac

Gene McCluney
2-Jul-2008, 09:02
Ortho litho is indeed a type of graphic arts film with orthochromatic sensitivity, designed to produce a black and white (no grey) image. It is used in the graphic arts industry. Some photographers get continuous tone negatives from it by developing it in special low contrast developers.

RA-4 chemistry is the standard chemistry for developing color prints from color negatives. Developed by Kodak, this chemistry is provided by all vendors although they don't all call it "RA-4". If you were to process a sheet of ortho-litho film in RA-4 chemistry, you would achieve a completely clear sheet of film with no image.

robert fallis
2-Jul-2008, 15:32
I use ortho lith film from freestyle
and for develop it in ilford multigrade paper developer for continuous tone. the arista film is great. this is what freestyle suggest.


2-Jul-2008, 16:31
I've used Kodalith Ortho and got a good amount of tone by using diluted Suprol and extended developing times. There is no red sensitivity though, making this great for anything but portraits and magenta-toned objects.

Gene McCluney
2-Jul-2008, 19:18
Mustafa always seems to come up with the wildest ideas. I think he needs to show us some of his images to prove he is really interested in photography.

John Kasaian
3-Jul-2008, 06:53
I'm unfamiliar with Claudia Wornum but it sounds as if she cross processes her film. I've never tried this with ortho (and i'd be surprised if it would produce any kind of an image) but ultimately the only way to find out is to soup some ortho in RA-4+

Let us know what develops, Mustafa! :)

Darryl Baird
3-Jul-2008, 07:14
her website states she develops exposed ortho film, re-exposes to light during development (aka Sabattier (http://www.thephotoforum.com/forum/archive/index.php/t-12545.html) or solarization (http://unblinkingeye.com/Articles/Solarization/solarization.html)), then prints on color paper using RA4.

Wild stuff in just the materials used, but it gets wilder as pinhole diptychs and panoramas. http://www.claudiawornum.com/

totally experimental -question can't be answered with facts, only suggestions

Gene McCluney
3-Jul-2008, 08:42
Wornum does not use RA-4 chemistry in the development of her film. She just uses RA-4 to develop her prints which are on color paper, and RA-4 is the normal process for developing color prints.