D-19 - what do you think of this formula?

traveler_101 · May 2, 2019

Ian Grant said:
The figure I've always seen and used is 125ml of stock D76/ID-11 developer per 80sq inches of film either used FS in a rotary processor or 1+1 to 4+3. The 250ml is the minimum quantity of D76/ID-11 at 1+1 per 80sq inches. (1 roll 35mm or 120, 4 sheets 5x4 etc).
Ian.

Hi Ian, What is FS? I have a Paterson tank which is fine, except that it leaks (oh well). You are saying that one uses less developer in a rotary tank? Obviously my experience is limited, but the 225ml figure is based roughly on Kodak's technical sheet: "If you use Developer D-76 diluted 1:1,. . . you can develop one 135-3 roll (80 square inches) in 473 mL (16 ounces) or two rolls together in 946 mL." So far I have developed 150 rolls of b&w film, most of which has been Tri-X in D-76 1:1 with 250ml stock and 250 ml water. It is still the most consistent film-develop combination I have found.

traveler_101 · May 2, 2019

trendland said:
1:3 or 1+3 (the last value is looking more clear indeed) is such a kind of official dilution!
So if your tank is confortable with 600ml (it has to be filled up enough - so that developer reached the film complete) it is well done!
BTW : I checked the time, it is correct for tmax 100 (8min. 1+3 20degreeC) with D19!

Thank you so much. I will shoot the role this weekend and give it a try!

MattKing · May 2, 2019

traveler_101 said:
What is FS?

Full strength, or "stock" I expect.

guangong · May 2, 2019

I use D19 for processing 16mm and Super8 movie film. Use both reel to reel (16mm) and spiral tank (S8). Never tried to use with still photography. Make from scratch because I can make only what I need, with no waste.

Ian Grant · May 3, 2019

traveler_101 said:
Hi Ian, What is FS? I have a Paterson tank which is fine, except that it leaks (oh well). You are saying that one uses less developer in a rotary tank? Obviously my experience is limited, but the 225ml figure is based roughly on Kodak's technical sheet: "If you use Developer D-76 diluted 1:1,. . . you can develop one 135-3 roll (80 square inches) in 473 mL (16 ounces) or two rolls together in 946 mL." So far I have developed 150 rolls of b&w film, most of which has been Tri-X in D-76 1:1 with 250ml stock and 250 ml water. It is still the most consistent film-develop combination I have found.

FS - Full Strength. I haven't mentioned Rotary tanks, but yes they do require 125nl of stock developer per film however it's diluted, it's a figure with a slight safety margin. It's close to Kodak'sm225ml of 1+1. I use Paterson tanks for 120 and the odd roll of 35mm and Jobo 2000 series tanks for 5x4 but these pedate the later rotary Jobo's and are inversion tanks.

I think the main reason Ilford and Kodak stopped the 1+3 development times was the rising use of rotary processors where there can be insufficient developer at 1+3.

Ian

traveler_101 · May 30, 2019

Ok, I tried it out! T-Max 100 @ 100 developed in D-19 1 + 3 at 8 minutes. Maybe it is o.k. for some purposes, but shooting on a bright sunny day and mostly high contrast scenes, the results were very poor. The main problem is blown out highlights. I could have exposed two stops under and still had more than enough exposure. It worked better in more uniform light conditions. Try again: expose less and develop at 1 + 4, or, just call it day. This one is after reducing exposure and brightness values in Flickr's editor:

https://www.flickr.com/photos/93975264@N05/47936315992/in/dateposted-public/

guangong · May 30, 2019

D19 is used to process black white reversal movie film precisely because it promotes contrast. I also used to make bw slides. Too much contrast for normal development of film for bw prints, unless blown out highlights are desired.

D-19 - what do you think of this formula?

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