Ilford HP5+ in HC-110 - Exposure index

[lamap]

Hi,

I have been using Agfa Apx400 precessed in HC-110. I got much better results when exposing the film at 200 ASA.
At 400, the pictures were mostly underexposed.

Now that I will start using HP5+ processed in HC-110, I wonder what should be the ASA index.

Please share your experience.

Thank you.
Best regards,

Luis Pacheco

 

[capitalK]

I rate HP5 @ IE 320, develop in HC-110 1+49 @ 8 minutes

 

[lamap]

thank you for the information.

thank you for the information.

thank you for the information.

Best regards,

Luis Pacheco

 

[Ronald_H]

It depends on what you plan to do with the negatives. I don't have a darkroom, so I scan. HP5+ works best for me at about 640ISO. 7.5 minutes HC-110 solution 'B'.

Just try and see what you like best. You will nail the correct combo for your tastes in no time.

 

[JohnTF]

If you are going to be using this combination for a while, I would shoot some test rolls, and perhaps even borrow a densitometer to see what is happening.

There are many variables, shutter accuracy, meter accuracy, etc.

Or perhaps the best approach is the one you used before, just adjust your EI to fit what ever is going on in the rest of the process. ;-)

I have known pros who routinely pull processed their film, shooting at a lower EI, but if you wish to know what is going on technically, a few rounds of tests might be worth while. The friend who was pull processing, was looking for a particular negative type.

Changing the developer times changes the characteristics of the negative, especially the contrast.

If your exposure is off due to some technical problem with the camera, the place to compensate is in the camera, not the processing, unless you do not mind the corresponding changes in the negatives.

Every film does have a true speed, changing the development time does not change the film speed, but the density and contrast of the negative. Changing your EI (chosen film speed setting) may be compensating for your camera, you may not know until you do some testing.


Regards, John