Hi, I posted a few days ago about some film that got overexposed by two stops by accident. Just thought I'd report on what happened.
I processed it the HP5+ in D76 1+1 because my tests had shown that HP5+ loses some speed at that dilution. I cut back the processing time from Ilford's time of 11 minutes to 9 minutes. The result was that the shadow areas measure about .90 on the densitometer, but the highlights are about 1.90, so the contrast appears to be fine for printing.
Also I tested HP5+ in D76 straight, at 4 minutes, 5.5 minutes, 8 minutes, and 11 minutes, all at 68 degrees. Ran that through the BTZS Plotter program, and found out that HP5+ shoots at 400+ if you develop for normal and normal plus times, between 7 1/2 minutes and 10 1/2 minutes. My normal time (SBR 7) was 9 minutes.
But for Normal minus development (6 1/2 minutes), it shoots at something closer to 320+.
Here's how it broke down: SBR Development time 6 10.5 minutes 7 9 minutes 8 7.5 minutes 9 6 minutes SBR EFS 6 400+ 7 400+ 8 400 9 320+In the BTZS system, SBR means subject brightness range (range from darkest darks to brightest whites) and EFS means effective film speed.
As they say on the internet, YMMV. --shannon http://shannonstoney-twors.blogspot.com/ http://branguslane.blogspot.com/ http://www.flickr.com/photos/shannonstoney/ http://www.eyeballkicks.blogspot.com http://allfiber.blogspot.com ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.
