RE: VDB is "Brownprint" process?

I don't prefer to filter the sludge just after mixing. Since this type
of emulsion needs a ripening time (1 - 2 days) before working
consistently, I prefer to leave all the chemicals intact and shake the
bottle occasionally (every 1 - 2 hours or when it comes to my mind)
during the ripening period. When the ripening period is over, I filter
the emulsion and start to use it. Maybe it's a too
conservative/compulsive way of action but I feel better doing so. The
sludge issue is normal for Vandyke; never managed to mix it without
sludge formation. I was disturbed of it (thinking the same way as you
think right now) the first time I mixed it - but it worked well. Never
had a problem (apart of silver plating in relatively old sensitizer ~
after around 1 year) with any of batches I mixed (all of them
demonstrated this sludge phenomenon).

Regards,
Loris.

-----Original Message-----
From: Yves Gauvreau [mailto:gauvreau-yves@sympatico.ca]
Sent: 23 Şubat 2006 Perşembe 16:34
To: alt-photo-process-l@sask.usask.ca
Subject: Re: VDB is "Brownprint" process?

Hi Loris,

you mention below "filtering the sludge before use" I wonder if this
could be done just after mixing? Also aint this sludge a signal that
there is to much of something? Before I forget, thanks for this well
explained and well written process description.

Regards
Yves
Received on Thu Feb 23 08:49:37 2006