Confused..Dev time for Arista EDU 400..

[peter_korzaan]

<p>Developing 4x5 and there seems to be discrepancy in develop time for Arista EDU Ultra 400.. in D76 1:1<br>

The sheet that came in box from Freestyle states 12-13 minutes.<br>

Digital Truth table has 10 and also 12-13!</p>

<p>Which is right? </p>

<p> </p>

[thirteenthumbs]

<p>2nd attempt in an hour.</p>

<p>All are!<br>

Published times are starting points that will give usable results.<br>

I always use the information supplied with the film over information posted on the net.<br>

10 minutes is 600 seconds; 17% less than 12 minutes; common adjustment for shutters running 1/2 stop or more slow. (720 *.17=122.4; 720-122.4=597.6 round to 600)<br>

12 minutes is 720 seconds; 20% more than 10 minutes; 7.8% less than 13 minutes.<br>

(600*.2=120, 600+120=720; 780*.078=60.84, 780-60.84=719.6 round to 720)<br>

13 minutes is 780 seconds.<br>

Digital Truth Massive Developing Chart contains entries from users who's techniques and conditions are not made clear.</p>

 

[peter_korzaan]

<p> Ha.. makes common sense, everything in film is set by a starting point.. the equipment your using and what your preferences are.. only way to find out is to use it, and adjust and adapt.<br>

Not having shot this film in a long time, and forgetting the timing I had used before, was getting a little anal. <br>

Thanks Charles...</p>

[elsa_cooper]

<p>The <a href="http://darkroom-solutions.com/#cdtc">Darkroom Solutions CDTC</a> says Arista EDU Ultra 400 shot at 400 in D76 (1:1, 20°C) with 30sec agitation: 12:30 min.</p>