Page 2 of 2 FirstFirst 12
Results 11 to 19 of 19

Thread: 8x10 tray processing

  1. #11
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    13,210

    Re: 8x10 tray processing

    Jim knows best!
    sin eater

  2. #12

    Re: 8x10 tray processing

    Agree with Drew but I find it depends upon the subject matter. If I have exposed negatives of skies and clouds and I am using an energetic developer like pyro I would both dilute the developer and cut the number of 8x10 sheets tray processed to 2-3 to ensure uniform sky densities. Otherwise I develop six sheets of 8x10 in a pebble bottomed 11x14 tray. Tray developing or brush developing one sheet at a time is an enormous allocation of darkroom time that any reasonably competent LF photographer would have trouble with from an efficiency perspective. Just my $0.02.

  3. #13

    Join Date
    Aug 2000
    Location
    California
    Posts
    3,049

    Re: 8x10 tray processing

    Quote Originally Posted by Tin Can View Post
    Jim knows best!
    Thanks, at least it works for me.

  4. #14

    Join Date
    Aug 2001
    Location
    SF Bay Area
    Posts
    2,319

    Re: 8x10 tray processing

    When I hear such discussions, my thoughts are of Edward Weston and his technique. Prior to the mid 1920's he developed in open tanks with an MQ developer. After that time, he switched to single sheet tray development by inspection using Pyro. It worked for him.

  5. #15

    Join Date
    Dec 2014
    Location
    Beuningen (GLD)
    Posts
    20

    Re: 8x10 tray processing

    Quote Originally Posted by Jim Noel View Post
    Most workers use intermittent agitation of one kind or another. I prefer so seconds continuous agitation at the start, then 5 seconds each 30 seconds for the rest of the time. Another common timing is one minute at the start, and then 10 seconds each minute.
    I teach students to agitate by lifting alternate corners about 1-1.5 inches. Three corners takes 5 or 6 seconds. The next period of agitation begins with the corner which was not raised during the previous period.
    ALthough I have tubes of all kinds, and a large Jobo with Expert tanks, trays are my preferred method.
    Thank you, Jim.

    Yesterday when I did this continuous agitation, (D76 13 min. 23C) it felt very relaxing, so not bad at all
    I was just wondering if the processing time needs to be adjusted because of this continuous agitation.
    Best regards

    Hans

  6. #16
    Vaughn's Avatar
    Join Date
    Jan 2007
    Location
    Humboldt County, CA
    Posts
    7,405

    Re: 8x10 tray processing

    Hans, I would base that on the results you are getting at 13 minutes. If the contrast is a bit high, then that is a sign that you might want to try 12 minutes perhaps. Generally, one decreases the time a little going from intermittent to constant agitation. Going to rotating drums (Expert Drum 3005, for example), a 15% reduction is recommended. Constant agitation in trays is not as active as a drum, so perhaps a 10% time reduction is a good starting point.
    "Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China

  7. #17

    Join Date
    Dec 2014
    Location
    Beuningen (GLD)
    Posts
    20

    Re: 8x10 tray processing

    Quote Originally Posted by Vaughn View Post
    Hans, I would base that on the results you are getting at 13 minutes. If the contrast is a bit high, then that is a sign that you might want to try 12 minutes perhaps. Generally, one decreases the time a little going from intermittent to constant agitation. Going to rotating drums (Expert Drum 3005, for example), a 15% reduction is recommended. Constant agitation in trays is not as active as a drum, so perhaps a 10% time reduction is a good starting point.
    Well, the negatives I developed yesterday look a little more contrastly. I will check them tonight and see if adjustment is needed.

    Thanks again
    Best regards

    Hans

  8. #18

    Join Date
    Mar 2005
    Location
    Newbury, Vermont
    Posts
    842

    Re: 8x10 tray processing

    Hey...if you want the best of both worlds (advantages of both individual development plus shuffling multiple films) try this: place your developer trays into a much larger tray (say...four 8x10's into one 20x24), then place individual "shuffle" trays before (pre-soak) and after this large tray for remaining steps. Large tray can either be lifted whole and rocked around to agitate all negatives at once, or smaller individual trays can be selectively agitated depending on individual negatives needs.

    A couple of things: negatives are done face-up for all cycles, and one must, prior to implementing such a setup, do a "lights on" test with sacrificial (fresh) unexposed film, with sacrificial (fresh) developer, to allow fine-tuning of the specific amount of developer necessary to assure that films are always completely covered with developer during the entirety of the development cycle. Do not simply use water and/or already processed (reject) negatives for this test - as this will tell you nothing of the dynamic of developer and film during this cycle (as in bubbling causing film to float).

    Nothing against shuffling...works great! I suggest the above as simply something to add to your toolbox - try it, you might like it!

  9. #19
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    13,720

    Re: 8x10 tray processing

    I have a very specific shuffling technique. Each 30 sec the stack is rotated 90 degrees, so a different side is being held in the fingers each cycle, assuring edge to edge consistency. I also shuffle one more sheet per cycle than actually present, which means a different sheet is on the top each time. For example, if four sheets are in the tray, there will be five shuffles during that 30 sec cycle. Like Michael, I do 8x10 sheets in a 11X14 stainless dimple-bottomed tray, surrounded by a larger tray serving as a water temp jacket; for 4x5 film, I use stainless dimple-bottomed trays slightly larger than 5x7. For general use, a Zone VI comp dev timer fine-tunes the time. For really fussy use like matched color sep negatives, I use and expensive thermoregulator that keeps water temp constant within 1/10F. Film always face-up.

Similar Threads

  1. Single sheet tray processing (8x10") with PMK
    By Tim V in forum Darkroom: Film, Processing & Printing
    Replies: 13
    Last Post: 9-Aug-2018, 21:04
  2. Tray processing vs Semi-Stand processing... an example
    By Steve Sherman in forum Darkroom: Film, Processing & Printing
    Replies: 1
    Last Post: 20-Jul-2014, 09:06
  3. 8X10 Polaroid processing with 81-01 no loading tray design 30 seconds ago
    By Tin Can in forum Darkroom: Film, Processing & Printing
    Replies: 11
    Last Post: 7-Nov-2013, 05:18
  4. tray processing
    By Richard Schlesinger in forum Gear
    Replies: 9
    Last Post: 30-May-2005, 00:48
  5. 4x5 tray processing
    By Jim Jasutis in forum Darkroom: Film, Processing & Printing
    Replies: 16
    Last Post: 17-Oct-2001, 21:22

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •