Delta 100 exposed @ 400

[robert blu]

After having shot a roll of delta 400 I put a new film in the camera, but by mistake I put a delta 100 instead of the 400 one :bang: Not such a terrific problem because the photo can be repeated, only need a couple of hours time. I think anyway to develop the film with usual developer (Ilfosol 3), usual temperature, only increasing time to see which result I'll get. Any idea how long should I increase developing time? I think 40%, but no data about (did not find info in the Ilford site). Any suggestion?
robert, a little less quiet photographer today!

 

[jordanstarr]

....2 stops is about 40% increase in time. But remember, you've already set the density of your negative when you exposed the film. You're not miraculously going to get shadow details if you didn't exposure for it properly. Since delta is a higher contrast negative, you can expect some blown-out highlights by pushing it. If you're going to reshoot it anyway, then 40% is a good enough guess. If you overexposed in the first place, you might come pretty close to a proper exposure and make them usable without reshooting. But if you were accurate in your exposure, expect a higher contrast negative with little shadow detail and bright highlights.

 

[robert blu]

Thanks for suggestion. I'll reshoot anyway. But considering this accident I just want to try in order to get more experience. I think experience is a sum of mistakes
The photo were taken in a shadow area, no strong light. We'll see what happens, I'll post some result but not before a couple of weeks (I'll have some holiday with my wife first!).
robert

 

[robert blu]

I developed the film with usual parameters, only add 40% to the development time.
Some doubt about ilfosol 3 (which I do not use very oft) with a pale yellow color, maybe exhaust (?).
Here is on of the frames, after scanning and PP :

 

[Chinasaur]

Nice look and feel. Gratz!