Developement time

[Mats_A]

I have been developing my HP5+ roll films in ID-11 with -20% time. This have given negatives that have good highlights. Not washed out.

Now I have a roll that I'm shooting at ISO 200 (rated 400). As I am a complete noob I would like to know if I (in theory) should change my dev time for this roll. As I understand it shooting at ISO 200 will overexopse one stop, which is good for B&W. Then I think I could still use -20% time since more time would push the highlights toward the higher end and an overexposed film already have highlights.

Or do I have this totally backwards?

r

 

[Ian Grant]

Sounds OK, keep he dev time as it is -20%, many of us shoot HP5 like that at 200 EI for better shadow detail.

Ian

 

[George Collier]

Second Ian's suggestion. Rating film a stop or so under (giving an extra stop) is commonly done for shadow detail, development is for contrast, so keep the same.