Bill,
my darkroom experience is fairly thin, but I remember reading recently that
Ilford advised against presoaking their films beacuse they supposedly contain
a pre-wetting agent that ensures even development, and this agent will be
remove by presoaking.
Also, I read somewhere else that with XTOL pre-wetting could lead to uneven
development (from film to film as I understand it, not the effect you're
seeing but, who knows ?)
(found this at the Jobo site:
http://www.jobo-usa.com/bulletins/xtol.htm and
and http://www.jobo-usa.com/jq/jq9802.htm, under the title 'To Soak or not to
Presoak')
Cheers
Fabrice
>>>>> "Bill" == Bill Owens <[EMAIL PROTECTED]> writes:
Bill> Ed
Bill> I noticed these streaks when I took the film off the spool, after rinsing
Bill> and prior to soaking in Photo-Flo. It obviously happened sometime during
Bill> development. It was developed in Xtol for 9 3/4 minutes at 72 degrees, stop
Bill> bath for ~1 minute, and fixed for ~8 minutes in normal, not rapid, fixer
Bill> Bill, KG4LOV
>> The unevenness of the streak, and the fact that it runs along the
>> horizontal reminds me of a smear that may have occurred during squeegee
>> or drying process. It obviously did not affect development, and since
>> it's not very straight - I doubt it was a chemical level problem in the
>> tank. Do you use a wetting agent? Do you have a good film squeegee?
>> Is it possible the emulsion may have been soft and damaged by it when
>> you swiped it before drying? Wetting agents themselves can streak like
>> that if you don't get the film squeegeed pretty evenly.
>>
>> Thanks,
>> Ed
>> http://lightandsilver.com
>>
>> > -----Original Message-----
>> > From: [EMAIL PROTECTED]
>> > [mailto:[EMAIL PROTECTED]] On Behalf Of Bill Owens
>> > Sent: Monday, September 10, 2001 11:04 PM
>> > To: [EMAIL PROTECTED]
>> > Subject: Help with processing
>> >
>> >
>> > I processed a roll of Delta 400 today that was exposed at
>> > 6400. Just playing around with pushing. I ended up with
>> > some streaks on the entire roll, even the last 7 or so frames
>> > that were not exposed. Tom V was kind enough to put a frame
>> > on his site at:
>> >
>> http://www.bigdayphoto.com/images/streaks.jpg
>>
>> Any suggestions as to what may have caused this would be appreciated.
>> BTW, I was wearing a watch with "glow in the dark" hands while loading
>> this roll.
>>
>> TIA
>>
>> Bill, KG4LOV
>> [EMAIL PROTECTED]
>> -
>> This message is from the Pentax-Discuss Mail List. To unsubscribe, go
>> to http://www.pdml.net and follow the directions. Don't forget to visit
>> the Pentax Users' Gallery at http://pug.komkon.org .
>> -
>> This message is from the Pentax-Discuss Mail List. To unsubscribe,
>> go to http://www.pdml.net and follow the directions. Don't forget to
>> visit the Pentax Users' Gallery at http://pug.komkon.org .
Bill> -
Bill> This message is from the Pentax-Discuss Mail List. To unsubscribe,
Bill> go to http://www.pdml.net and follow the directions. Don't forget to
Bill> visit the Pentax Users' Gallery at http://pug.komkon.org .
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
