[pure-silver] Re: Same Exposure Different Prints?

On Sat, 5 Jul 2008 19:10:32 -0700
"Kurt J. Griffin" <kjg@xxxxxxx> wrote:

> >>      More information on your developing routine would be
> >>  useful.
> >>
> >Enlarger is at end of table, wall directly to the left. The room 
> >(box) is 8 foot square. At the center and top of the wall to the 
> >left is my red safelight with a 15W bulb. The walls are all 
> >unpainted particle board. Some stray light from the enlarger goes up 
> >and out, but I don't see much of it bouncing back down. Not much 
> >changes, besides my position and posture during exposure, I use a 
> >black apron, so don't think I'm reflecting light at the paper during 
> >exposure - regardless of where I'm standing when I push the button.
> >The trays are behind me. I take the print, turn and drop into the 
> >developer. One hand pushes the sheet down with the tongs so it's all 
> >below the surface while the other starts the 1 minute time. I 
> >agitate by paddling back and forth with the tongs at one end of the 
> >tray, occasionally giving the tray a tilt (this is my least regular 
> >part of the routing). At around 5 seconds to I begin to grab the 
> >sheet, I pull it out right on 1 minute and let it drip for about 5 
> >seconds, until the stream turns to a few drips. with the same 
> >procedure I put it into the stop for thirty seconds, then fix 1 for 
> >30 sec, fix two for 30 sec (I use Ilfrod rapid, 1+9) then a water 
> >holding bath, swoosh around for 30 seconds, take out to inspect, 
> >then back into the water. Full archival washing steps and solutions 
> >used at end of session.
> >
> >E.
> 
> I had a similar problem, which got worse over time.  Eventually, I 
> noticed that during each exposure (not during focusing), the 
> intensity of light varied enough to be seen with my eyes.  It would 
> fluctuate quickly, so you might need a fast-responding voltmeter to 
> see it.   Funny thing:  my backup timer did the same thing.  Problem 
> was solved when I got my StopClock.
> 
> Good luck with it,
> 
> Kurt Griffin
> Tucson
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I may have missed this, but what type of timer are you using for your
enlarger?

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