Developing 2 different films at once

[Hal]

Hi, another one new to the whole home-developing angle. Just a question I wanted to get off my chest; I have two exposed films, an FP-4 and an HP-5. According to Ilford's data-sheet, both take 20 minutes at 20C in ID-11 diluted 1:3. Does this mean I can safely develop them in the same tank at the same time (I'm not proposing to make this my first attempt at developing, I just want to know for later, as my time in the photo-club's darkroom is limited). Thanks in advance.

 

[Tim Gray]

If the times are the same at the same temp I don't see why you couldn't run them at the same time. In fact it'd be a bit silly not too.

 

[removed-user-1]

I've done this, as long as the time and temp are the same it doesn't seem to matter. Another thing that I've done is develop two different films in two tanks side by side, with different times for each. You just have to be certain to grab the right bottle at the right time!

 

[Tim Gray]

I've done this, as long as the time and temp are the same it doesn't seem to matter. Another thing that I've done is develop two different films in two tanks side by side, with different times for each. You just have to be certain to grab the right bottle at the right time!

I did that last night for the first time. Took some coordination.

 

[Denis R]

yes

I did hp5+ and delta 400 pushed to 32oo in t-max 1+4 10 min. @ 72f
the hp5+ was a basketball game, delta 400 testing camera and lenses - mixed shooting from moonlight to full sun

 

[Ken Nadvornick]

I've even done two different reels for two different film times in the same tank. Just loosened the tank lid at the end of the final agitation cycle for the shorter film, then plucked out the reel and dropped it into the stop bath as the first step in the next agitation cycle for the longer film. All in total darkness, of course.

Worked great.

Ken

 

[pentaxuser]

Hal I haven't a clue where you are but if you have access to a developer called Prescysol made in the U.K. by Peter Hogan then you can develop different films in the same tank. Using a semi-stand method all films are developed for the same time. I haven't yet used it but a number of UK APUGers do, including the well known Les McLean and all seem to swear by it.

Don't ask me how it achieves this, my knowledge of chemistry is far too limited but maybe a user will explain why it works OK this way.

pentaxuser