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i am pushing it...

Posted: Sat Apr 01, 2006 3:38 pm
by salvador
how the hell does one develop acros 100 that was pushed to 800? all opinions are welcomed.

Re: i am pushing it...

Posted: Mon Apr 03, 2006 8:51 am
by Ornello
salvador wrote:how the hell does one develop acros 100 that was pushed to 800? all opinions are welcomed.
The film is underexposed and cannot yield satisfactory images.

Posted: Mon Apr 03, 2006 9:24 am
by circleofconfusion
You'll have to push it 3 stops which, while excessive, should give you some sort of image. It will be grainy and the greys will be a bit crushed but that's better than nothing.

Fuji's datasheet only gives timings for pushing 1 stop: http://www.fujifilm.co.uk/technical/download/acros1.pdf

Find out what the time is for your usual developer at ISO 100 and 200 and then interpolate. As an example:

lfotec DD-X (1+4) @100 9 min
lfotec DD-X (1+4) @200 14 min

That's a 55% increase in developing time so you could estimate the time to push to 400 as 22 mins and 800 as 33 mins. Which is just mad... the developer will be exhauseted by then not to mention stone cold. But it gives you a starting point.

Look at the data sheet for a 'high speed' developer and see what they suggest.

Posted: Mon Apr 03, 2006 1:27 pm
by Ornello
circleofconfusion wrote:You'll have to push it 3 stops which, while excessive, should give you some sort of image. It will be grainy and the greys will be a bit crushed but that's better than nothing.

Fuji's datasheet only gives timings for pushing 1 stop: http://www.fujifilm.co.uk/technical/download/acros1.pdf

Find out what the time is for your usual developer at ISO 100 and 200 and then interpolate. As an example:

lfotec DD-X (1+4) @100 9 min
lfotec DD-X (1+4) @200 14 min

That's a 55% increase in developing time so you could estimate the time to push to 400 as 22 mins and 800 as 33 mins. Which is just mad... the developer will be exhauseted by then not to mention stone cold. But it gives you a starting point.

Look at the data sheet for a 'high speed' developer and see what they suggest.
You will get something, but very little of any value. I would not bother.

Pushing Acros 100

Posted: Sun Apr 09, 2006 4:17 am
by pentaxpete
Year ago 'Practical Photography' Magazine here in UK published a 'pushing' process called 'FF/DD' -Fast Film Dilute Developer which I tried and got some surprising results on some films. Try the technique: dilute a standard MQ Borax Dev. such as D76 1+4 and give it 1 hour at 68oF,agitation only every couple of minutes or so.