Tri-X 400 at ISO 100

Dear friends,

 

I have a roll of Tri-X 400 (the 'new' version, code 400TX) shot at ISO 100 by

mistake :( . I have only 4 developers availabe: HC-110, X-tol, Rodinal, and

Ilfosol-S. What is the processing time in any of these chemicals? The only time

I found (on digitaltruth.com) is 7.5 min at 20C in Rodinal 1+50. Can anybody

confirm this? It's quite an important roll.

 

Thanks!

I typically reduce my normal (box speed) development time 20% per stop pulled. So if my time were 10 minutes at ISO 400, then my time at ISO 100 would be 6.4 minutes. Some will say 10%, others 30%, but I have found 20% to work well for my process.

I agree 20% per stop, then if you do it again you might want to refine a little.

If it's an important roll, consider shooting another 400TX roll (or more) at 100 under similar conditions and experiment using that.

Don't worry. It's Tri-X, and you only overexposed it two stops. Tri-X is very forgiving of overexposure. You could develop normally, and you'd get slightly thick, but still easily printable (or scannable) negatives. Pulling a bit may make it even easier to print or scan. 7.5 minutes at 1:50 in Rodinal sounds about right for ISO 100. Standard time I use is 11 minutes in Rodinal 1:50 at ISO 400.

I recently shot 320 trix (although 220) and pulled it to 100. I used xtol at about 7min 10 sec, come out pretty well i must say.

Changing the development time affects contrast much more than film speed. So if you pull the developer by two stops you'll end up with negs that'll need a very hard grade of paper to print, or an excessive contrast boost in scanning.

 

I'd recommend that you use a developer that loses you some film speed, like D-25, Perceptol or Microdol-X. Then pull development by no more than 1 stop. That should give you a good compromise between excessive highlight density and low negative contrast.

I did the same thing and used D76 1:1 for 8 min. They scan great, here are a couple samples:

 

http://www.rangefinderforum.com/photopost/showphoto.php?photo=50627&ppuser=489

 

http://www.rangefinderforum.com/photopost/showphoto.php?photo=50568&ppuser=489

 

http://www.rangefinderforum.com/photopost/showphoto.php?photo=50628&ppuser=489

 

camera used was a Leica M6 and 35/2 asph. summicron.

 

good luck!

I finally decided on Rodinal 1:50, 6.5 min at 20C. The film came out fine, it's hard to tell the difference between it and one exposed at 400 ISO. There is some base fog, but again I always get this from Rodinal and the new Tri-X.

 

Thank you all for the advices!