During my last printing session, while trying to find the good exposure time for my prints, I faced a weird situation about the needed exposure time.
When setting my enlarger opening at
f/11, I usualy have needed exposure times between 10 seconds and 30 seconds. This time it was way much shorter:
- while exposing only 1 second the photo was not enough printed (the final photo is way too white)
- while exposing 2 seconds the paper was almost burned (the final photo is way too dark)
- so I narrowed the enlarger opening to
f/16, and then the good exposure time was a bit less than 3 seconds to have a correct print.
In the end I have some correct prints, but I'm very surprised of this very short exposure time.
What could explain such a small needed exposure time ?
For the context & the technical details:
- I used the same enlarger, paper (multigrade) & filter as when I usualy have between 10 & 30sec of needed exposure time
- The photo were taken outdoor, on a sunny summer day
- The film is a Kodak 400TX. First time I use this film, is it known to be "short to print" ?
- I developped the film myself. Could the film itself be not enough developped ?
- The paper developper is Ilford Multigrade, which bottle is opened since ~2 years (kept well closed in a dry & not hot place). Could this aged developper be "more powerful" and explains this very short exposure time ?