A question about development times

[Kenj8246]

It's 'common knowledge' that dev times shy of 5 minutes are suspect. 🙂 How do you folks, especially medium and large format folks, when faced with a N-y situation, decide the new time is too slow and move to a different/faster EI?

Thanks.

Kenny

 

[charjohncarter]

Hard one, maybe use a dilution that gives a longer time to start with. This will then allow times on N-# that are over 5 minutes.

 

[waileong]

Why would you have a N-y situation? You got so much light to spare? Anyway, to lengthen development time, just dilute or develop colder.

 

[Kenj8246]

Hard one, maybe use a dilution that gives a longer time to start with. This will then allow times on N-# that are over 5 minutes.

Yeah, this is kinda what I was thinking, John; it'll make concentrate last longer, if nothing else.

Why would you have a N-y situation? You got so much light to spare? Anyway, to lengthen development time, just dilute or develop colder.

You could have a N-y situation if you metered more than the normal 5 stops of contrast.

 

[Fotohuis]

I am using a developing robot, the Heiland TAS processor, so I am going to a minimum of 4 1/2 minutes.
But indeed you have to start for N=0 for a higher dilution, especially when using HC-110 or Rollei Supergrain, more fast working developers.

 

[Godfrey]

It's 'common knowledge' that dev times shy of 5 minutes are suspect. 🙂 How do you folks, especially medium and large format folks, when faced with a N-y situation, decide the new time is too slow and move to a different/faster EI?

I nearly always use developer dilutions that net average N=0 times in the 8 to 10 minute range. That way I can push or pull more easily.

G