RE: Determining SPT with gum Was: Gums a la Demachy and Puyo

Thanks David... Are you still experiencing power problems down in the South?
"Kolay gelsin" :)

Regards
Loris.

-----Original Message-----
From: davidhatton@totalise.co.uk [mailto:davidhatton@totalise.co.uk]
Sent: 12 Temmuz 2006 Çarşamba 14:15
To: alt-photo-process-l@usask.ca
Subject: RE: Determining SPT with gum Was: Gums a la Demachy and Puyo

...

Gum, in my experience, can't really be compared with normal (silver, iron,
platinum etc.)photographic processes, there being far more variables
inherent in the way it works.

In the beginning, I determined that I would develop automatically for no
more than 30 minutes. This was purely arbitrary based on information
gathered from books, the list etc..The rest of the process is based on the
development time. I determined the SPT by using a stepwedge and guesstimated
exposure time (initially 10 mins.) to attain two solid steps at steps 1 and
2. The all the rest is as the system says. It seems to work. Although,
having said that the RH has shot up in the last few weeks causing an increas
in speed. That's no problem though because I can develop for hours if I need
to whereas for other processes one can't. Oh oh.. The power has just gone
off (first time today - whoopee) - must log off.
Hope this helps. Not very technical I'm afraid, it's all a bit seat of the
pants for me :)

Regards,

David H
Received on 07/12/06-02:38:16 PM Z