----- Original Message ----- From: <[EMAIL PROTECTED]> To: "PDML" <[EMAIL PROTECTED]> Sent: June 3, 2001 1:49 PM Subject: OT: pre-rinse > > Hello all. > Another one of my darkroom questions, now about pre-rinse. afaik it used to be used with old film types, now only with rotary processors (like jobo cpe,...). How > did it work / what it did? Any good URLs on it? I am interested because when I accidentaly pre-rinsed (I though I am pouring in developer, it was water. About 1 > minute pre-rinse <g>) couple of films I wasn't too serious about, I got something looking like overdeveloped negatives, but being just too high fog/base level. It might > have been the developer used though. I said I wasn't too serious about it with those films - I knew there are no interesting pictures. What a pre rinse does is to soften the emulsion and saturate it with solution. This makes for a faster and smoother developer imbibition into the emulsion. It does change the needed developer time, and can change the effective speed of the film slightly as well. Since the problem you describe is high fog levels, I would be looking elsewhere than an accidental pre rinse causing this particular problem. A question: Was this the first films you put through your new Jobo tank? You might have a light leak. William Robb Remember, the LX Gallery is coming up. Please see: http://pug.komkon.org/LX_Gallery/LX_Submit.html for more information. - 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 .
