A Site for Photographers by Photographers

Community > Forums > B&W Photo - Film & Processing > Films > Kodak Contrast Process Ortho...

Featured Equipment Deals

Basic Image Development in Lightroom: Color Editing (Video Tutorial) Read More

Basic Image Development in Lightroom: Color Editing (Video Tutorial)

Learn basic HSL (hue, saturation, and luminance) color adjustments as well as split toning (adjusting color in highlights and lowlights) in this next video.

Latest Learning Articles

Featured Member: Katarzyna Gritzmann Read More

Featured Member: Katarzyna Gritzmann

Photo.net featured member Katarzyna Gritzmann talks about photography and portfolio of images.


Kodak Contrast Process Ortho Film

Christian Muro , Jul 23, 2011; 07:23 a.m.

I managed to aquire some 4x5 Kodak Contrast Process Ortho Film (Estar Thick Base / 4154 Thick) expired July 1973. I was wondering if anyone had any tips on how to use this film and if I can develop it with D76. Thanks!

Responses

John Shriver , Jul 23, 2011; 10:36 a.m.

It's an inherently very high-contrast film, like High Contrast Copy or Technical Pan. The contrast index in D-11 developer at the recommended time was about 3.4. Kodak only gave times for D-8 and D-11, which are both even hotter and higher-contrast developers than D-19.
While you could certainly find a processing time with D-76, the contrast would still be well beyond the normal pictorial range. You'd really need to use a POTA developer (such as Technidol) to get a gamma under 1.0.
You can certainly do "development by inspection" under a red safelight with D-76, so that you have a bit more control when experimenting. It would probably be more interesting to develop it in D-19, for lith-type high-contrast results.

Robert Meyer , Aug 09, 2011; 08:46 a.m.

I use Diafine for several different types of Kodak scientific glass plates, and for Kodak Electron Image film. It's a 2-bath developer, and you develop all films for the same times, 3 minutes in each bath. I get good approximately-normal contrast negatives out of everything I develop with it.

Back to top

Notify me of Responses