Jodad Posted June 28, 2019 Share #1 Posted June 28, 2019 Advertisement (gone after registration) Hey all,I want to shoot some HP5 at 160 but on the massive dev chart i can only find HC110 times for ISO 100 (pulled 2 stops) and 200 (Pulled 1 stop). at 160 its pulled 1 and 1/3 stops. Anyone know how i calculate the dev times? Link to post Share on other sites More sharing options...
Advertisement Posted June 28, 2019 Posted June 28, 2019 Hi Jodad, Take a look here How to develop for inbetween ISO values that i cant find on Massive Dev?. I'm sure you'll find what you were looking for!
M9reno Posted June 28, 2019 Share #2 Posted June 28, 2019 If (according to the massive dev chart) normal development is 11 minutes, pull 1 stop is minus 3 minutes, and pull 2 stops is minus 4.5 minutes, drawing a rough curve would suggest approx. minus 3 minutes and 45 secs. I take the published figures as just approximations anyway. 1 Link to post Share on other sites More sharing options...
Jodad Posted June 28, 2019 Author Share #3 Posted June 28, 2019 thanks M9, i didn't realise it would be so simple. Link to post Share on other sites More sharing options...
Pyrogallol Posted June 28, 2019 Share #4 Posted June 28, 2019 (edited) Why? if you want to lower the contrast of the negatives by overexposing them and under developing then do so, but if not try a softer slower working developer or a slower film. my friend does rate his Delta 400 film at 200 and reduces the developing time to compensate and produces fine exhibition prints, as he has for 50+ years. Some of his pictures can be found here http://johnbracey.greatyarmouthphotographic.co.uk/index.html Edited June 28, 2019 by Pyrogallol 1 Link to post Share on other sites More sharing options...
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