Digital BW, The Print

Hello,
 
This is just a thought from my "far past" processing of film.  It would occur when using a strong stopbath between the developer and the fixer. At the time it was determined to be explosions within the emulsion. Of course the emulsions were thicker back then. To overcome this phenom we used a plain water bath instead of the acid.  Just a thought and I don't know if this would be the cause of your black spot problem.
 
T

Stephen Kobrin <skobrin@...> wrote:
Thanks Martin,

In fact, I did spot one last night and got to the point in about a 
half hour where the damage was not obvious in the print.  Will try 
again, using more care at the end of the wash cycle.  I did switch 
from Kodak to Ilford Rapid Fix and I wonder if it was either a bad 
batch or the Ilford requires a longer wash than the Kodak.  I usually 
wash for seven to eight minutes after using a hypo clearing agent.

Steve

> Steve,
> 
> I have shot and developed a lot of FP4 and I have seen this happen 
but
> always assumed it was a result of using pyro developers. What it 
appears to
> be is a crystal growth that occurs during the wash cycle. My cure 
is to run
> the film gently through my fingers while under flowing water to 
dislodge and
> wash away the particles. Once they have dried in place I have not 
been able
> to removed them and have found that they can grow with time on the 
negative.
> I have no explanation for the phenomenon. There is one nice shot 
that I
> spent many hours spotting all of the garbage out. If you have a 
real keeper
> of a shot it can be done in PS. One of the reasons I pursued digital
> printing.
> 
> Martin Wesley


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