To 85B, Or Not to 85B...

I have a box of 4x5 Kodak 4325 Commercial Internegative Film that expired in 2004. I got it cheap, as I do most of the film I shoot. Internegative film was used to make a negative from a color corrected positive that would then be used to make positive copies for distribution. Normally you see this in the motion picture industry using 35mm stocks, but I suppose magazines and such could use the same process with sheet film. As you might imagine, this was not intended to be used 'in-camera'. It is copy film that would be used in a very controlled environment in a copy machine of some sort. It is tungsten balanced (again not for daylight use) and very fine grained. After all, if you went to all the trouble of making a good positive, you don't want to lose information by copying onto grainy internegative film. With very fine grain comes a very low ISO rating. I rate this film at about ISO 1. That is really slow. I could go as high as 5, but 1 is easier for me to remember. Why is 1 easier to remember than 5?? The human mind continues to be a mystery.

Being tungsten balanced means that colors look 'normal' when this is shot under tungsten (incandescent) light which is a warm yellow color. Out in the daylight which is a bright slightly blue/white, things look quite blue. The 'analog' solution to this is to use color correction filters. These are filters you put on the front of your lens to change the color of the light entering the camera from something like daylight to something like tungsten (orange filters), or vice versa (blue filters). Since I have tungsten balanced film that 'expects' yellowish light and I want to shoot out in the blueish sunlight, I need the orange filter known as 85B. There is an 85C also that is less intense for use later in the day when the light is already turning orange outside.

I took a couple shots of the same thing out in the garden, one without a filter and one with the 85B. Then I developed them normally in C-41 chemistry and scanned them, only adjusting for contrast. Then I took them into Photoshop and corrected each of the RGB histograms, adjusting them each to full scale. Then I masked off the left half to see what the image looked like out of the camera compared to what it looked like corrected in PS.

First the unfiltered shot:

And the one with the 85B:

Looking at the left half of each shot, you can see a clear difference made by the filter. On the right side that has been further corrected in PS, the shadows are still sort of blue/green on the uncorrected shot. I could probably work that out with some more time and effort on the computer, but the point of being careful and intentional with analog photography is so that I don't have to spend my life on the computer. I want to make nice photos in my camera and on the negative. Sometimes that means putting a filter on the front of my lens to get the colors looking the way I want them.

Finally, here is a shot out in the broad daylight, also shot through the 85B. This one is a little more colorful and interesting. It is your reward for reading through my article, so enjoy!

Reversal Revisited

If you remember this post about reversal processing images taken on photo paper (enlarging paper) in-camera, then this might be of some interest. I have done some more experimenting. At first, I made the terrible mistake of changing too many variables at once. I was trying different papers and rushing through the processing procedure and the results were all bad. In order to understand a process like this, you have to isolate a variable and just change that incrementally so that you can see what effect that variable has on the end product. So I decided to just use one paper (Arista Grade 2), one camera (Graflex Speed Graphic with the Graflex Optar 135mm lens), and one dev/reversal process (outlined in the aforementioned post). So I took 4 shots of a high-ish contrast subject. I only varied the exposure. I used iso ratings of 0.25, 0.5, 0.75 and 1.0. I know those seem like extremely low ratings, but it turns out they are in the right ballpark. I started here based on some vlogs by Joe Van Cleave as well as some initial Googling and experimentation. Anyway, I wanted to share my results, so here goes.

These are in order of low to high iso rating. The subject is a scooter and a padlock against a brown fence in direct sun. The exposures were all done at f/16 and the times were 4, 2, 1.5 and 1 second respectively.

I can tell very little difference between the last two, but they both look about right. They might tolerate a bit less exposure, but for a regular scene with more mid-tones, I think iso 1 will do nicely. So here's what I think I am learning about this process. Expose more than you think you should. Develop to completion on both dev steps. Stop and wash completely! Keep the bleach fresh (I make 300 mL and discard after 4 sheets). If you have bleached adequately, you don't need to restrain the second exposure. I am using bright bathroom lighting for 2 minutes.

Now the next step will be to make exposures in my Ansco 3A and get some postcard format pictures out that I can send to my analog photo friends. I might even try tank developing those and see what happens. If you are doing reversal processing, drop me a comment and let me know how it's going.

Moving Forward in Reverse

If you read my article on lumen printing, this is sort of an addendum or appendix or epilogue or sequel. I had the paper cut, but for the lumen prints, I had cut it in sort of dim diffuse room light, so those pieces are really only good for lumen printing since they are a bit exposed already. So I went and cut some more 8x10 Agfa Multicontrast paper under my red led headlamp (hung about 30" above the work surface). Those pieces went directly into film holders. I had read about reversal processing film a while back (reversal processing is how slides or transparencies are made) and was sort of interested, but the bleach put me off. Most reversal process bleach is made with dichromate or permanganate compounds which are pretty toxic and best avoided if possible. So I shelved the idea of diy reversal. Then I read an interesting article about a fellow who made a working reversal bleach with just household hydrogen peroxide and lemon juice (the active ingredient there being citric acid). WHAT!? This I've got to try. I didn't have any film ready to develop, so why not try with the papers? It's more or less the same emulsion, just with a different base and in the case of RC paper like mine, a different top coat. What the heck, let's just experiment!. The article called for caffenol for the development steps, but I didn't have any of that ready to go. I did have some homemade my-tol(X-Tol knock-off), so I figured I'd just use that at stock concentration and see what happens. I read on APUG that you can develop paper with X-Tol stock for about 5 minutes, so that's where I started. Here is an overview of the process I used (note, I used 9g/L dry citric acid in place of lemon juice):

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STEP	TIME
1st developer (my-tol)	5 min
Wash	5 min
Bleach (cit. acid-hydrogen)	11:30 min
Wash	5 min
Re-exposure 300W at 1 meter	2:30 min
2nd developer (my-tol)	5 min
Wash	5 min
Fixer	5 min
Final Wash	5 min
Wetting agent	2

The first sheet I did with straight stock my-tol for 5 min in both development steps. Here it is. This is a straight color scan without any added colors, curves or contrast.

A couple of notes worth making here... I was tray developing under red light so I could see what was going on. After a couple of minutes in the first developer, the paper looked completely black. I couldn't see any image at all. I was a little worried, but I kept going because I knew that this was not necessarily an indication of failure yet. The bleach brought out a little bit of an image. I could just make out some light areas. Once I turned on the room lights for the re-exposure step, I could tell that the image was there still. It looked bad and was very low contrast. I thought, "well I guess I'll have to correct it in post." That's not what I was hoping for with this process, but sometimes that's all you get. But then I poured in the 2nd developer (same developer as I used in the first developer step) and there was the image, nice and crisp and contrasty in tan and deep black. That is when I got excited. The fixer didn't change the image since there really isn't any undeveloped silver left at this point.

The next set of exposures I did with 1:1 my-tol, thinking that I might lower the contrast a bit. Unfortunately, I was tray developing these together in an under-sized tray and so there are artifacts where the sheets contacted each other. But these are experiments, not art. What I was trying to see was whether the dilute developer would lower contrast. I don't think it did. Maybe more dilution or a different type of developer (vit. C based like caffenol or parodinal) would work. Maybe something as simple as preflashing the paper would work. These are all variables that can be explored.

So there you go. I think I really like this process. If anyone else has experience and wants to share some tips, please do!