Search:

Type: Posts; User: koraks; Keyword(s):

Page 1 of 51 1 2 3 4

Search: Search took 0.04 seconds.

  1. Replies
    4
    Views
    416

    Re: Pushing Delta 100 with Redfilter

    A ballpark/seat of the pants compensation would be to add something like 30% to the normal development time. This will give a significant boost to contrast. From there you can adjust to taste for...
  2. Replies
    3
    Views
    143

    Re: Durst CLS 1840 shutter diagram

    Should be pretty easy to trace out. Just take it out and start drawing.
  3. Re: Ilford Multigrade 500HLE For 8x10 Enlarger Needs Work

    This could be just about anything, but none of 4 bulbs turning on leads me to believe the prime suspect is the power supply unit. It's been a while since I used my 500 head, but as I recall, the...
  4. Replies
    21
    Views
    731

    Re: Avoiding purple tones with selenium...

    Dilute further or shorten toning time. Since your time is already short, further dilution is the most sensible approach.

    If you like this paper's tone without selenium toning, then just skip...
  5. Re: Is this emulsion 'damage' due to a light leak or chemicals ?

    Looks like the sheet stuck to the side of the tank on that corner.
  6. Replies
    10
    Views
    277

    Re: Paterson Contact Frame for Kallitypes?

    Yes, the pressure would be my concern as well if very stiff substrates are used for printing. But in my experience the foam padding of the paterson frames is pretty stiff and it takes a lot of...
  7. Replies
    10
    Views
    277

    Re: Paterson Contact Frame for Kallitypes?

    Haven't tried it, but don't see why it wouldn't work. Just give it a try if you have one of those frames already.
  8. Re: Jobo CPP-2 Temperature board - question for experts

    Yes, open failure of c49 is a likely cause. You could work out based on the datasheet if this does indeed result in a negative out of range error as you're seeing.
    The problem I see with this...
  9. Re: Jobo CPP-2 Temperature board - question for experts

    Could you upload the full schematic please?
    What types are IC46 & 45?
    I assume 45 is a 7-segment driver? Or is it an ADC?


    Likely around 0V, but I'd need to see the rest of the schematic and...
  10. Thread: Film in freezer

    by koraks
    Replies
    13
    Views
    621

    Re: Film in freezer

    I'm with Drew on this. Unopened film goes in the fridge (not freezer in my case), and opened bags stay at room temperature. Refreezing opened bags should be ok in theory as long as there is...
  11. Re: A foolish idea? Creating a positive transparency from a negative

    Timing exposure with room light will be impossible with regular film. With ortho film it will be extremely challenging still. Under an enlarger with a timer it's perfectly doable with slow/ortho...
  12. Re: Equivalent of Massive Dev Chart for Paper Developers ?

    > I've never been able to achieve it with current VC papers - they just look blaaah if you try that.
    Agreed. It's a good way to get thin, mottled blacks. Snatching is appropriate with lith, but I...
  13. Replies
    5
    Views
    591

    Re: Lagrafi 138 glass thickness

    You may want to verify this with the seller. +/-1mm tolerance for glass thickness doesn't make sense. For L and W I could see it (although it's kind of an outdated tolerance given today's cutting...
  14. Replies
    10
    Views
    611

    Re: Scratches on negatives

    Or maybe not. It doesn't look at all like the only consistent manufacturing defect in foma 200, which coincidentally also only seems to occur with 120 film and not with sheet film.

    Looks like a...
  15. Replies
    8
    Views
    606

    Re: Your Crucial Chemicals

    Metol
    Hydroquinone
    Phenidone or dimezone-s
    Sodium or potassium carbonate
    Sodium sulfite
    Potassium bromide
    Acetic acid/vinegar and/or citric acid
    Sodium or potassium hydroxide is sometimes...
  16. Replies
    11
    Views
    535

    Re: Help needed with bromoil

    Yes, that's wrong. There's an error on that website. They mention hypo clear, and then instruct to use sulphate, but hypo clear is sodium sulfite. I suspect the sulphate may harden the emulsion,...
  17. Replies
    11
    Views
    535

    Re: Help needed with bromoil

    Is your clearing bath actually sodium sulfate and not sulfite? If it is, this may be your problem.
  18. Replies
    8
    Views
    316

    Re: Multiple masks for contact printing?

    Give it a try, it works really well. And no tape whatsoever is needed in my experience, which eliminates the risk of damage and glue residues.
  19. Replies
    8
    Views
    316

    Re: Multiple masks for contact printing?

    That's what I do. I keep around a set of rubylith masks in sizes I use most often.
    The nice thing about rubylith of course is that the red stuff is actually very thin and laminated onto a much...
  20. Replies
    10
    Views
    1,052

    Re: Darkroom timers, and then there was FADU

    That's very nice! I'm particularly impressed by the OLED paper fog test, which I would have never expected to come out so well.
    The way you've set this up almost eliminates my hesitations about...
  21. Replies
    27
    Views
    1,824

    Re: Tiny Black Specs on Arista EDU Ultra 100

    With 4x5, I encounter the occasional pinhole in Fomapan 100. Every couple of dozen sheets or so, and it's always just one single, tiny pinhole.
    Fomapan 400 & 200 in 4x5: no defects noticed yet.
    ...
  22. Replies
    4
    Views
    300

    Re: Issues with Tmax 100 developed in SP-76EC

    There's something wrong with the developer, that's for sure. The pink hue is just remnants of antihalation dye.
  23. Replies
    19
    Views
    1,307

    Re: Favorite Current 8x10 B&W Film?

    To the best of my knowledge only tmax100 has this uv blocking property. So for alt process printing, tmy would be fine, but so would be any of the ilford films, foma, bergger etc.
  24. Replies
    21
    Views
    1,392

    Re: Electronic circuit in D5 lens turret

    I see what you mean now. The supposed sensors are still hard to see, but this is logical given the fact that they're below a layer of acrylic. I agree there doesn't seem to be much space for the...
  25. Replies
    21
    Views
    1,392

    Re: Electronic circuit in D5 lens turret

    I can't get a real clear view of those supposed sensors, but they don't really look like such. Moreover, 5 contacts for 9 sensors would be an interesting puzzle, given the likely fairly simple...
  26. Replies
    14
    Views
    1,455

    Re: Cibachrome printing

    I don't think so give the fact that the materials haven't been manufactured for many years...
  27. Replies
    16
    Views
    866

    Re: Trying out Chromium intensifier

    In my experience there's a limit to the repeated build up of contrast both with chromium intensifier and especially with staining redevelopment. After a few (ca 3) rounds no significant additional...
  28. Re: Jobo 2550 Tank + "Color by Beseler" Motor Base

    You'll have to see how it goes with the tank rotation in one direction all the time. You may or may not get uneven development. If you get bands of unevenness, you know what the possible cause would...
  29. Re: Jobo 2550 Tank + "Color by Beseler" Motor Base

    Rotation speed doesn't really matter for development time. It's continuous agitation and that's what counts.
    Uou may find you get uneven development at certain speeds; some find better results at...
  30. Replies
    154
    Views
    55,061

    Re: LED UV Light Box: Build Your Own for Under $150

    Russ, concerning the timing accuracy, there are simple timer circuits to be had on ebay etc. that allow you to accurately and repeatably time exposures. My uv tubes have a 1-2 second startup time,...
  31. Replies
    25
    Views
    2,109

    Re: Intrepid 4x5 as a permanent enlarger?

    Europe seems a little more challenging when it comes to finding large format enlargers. Nevertheless, in my experience, something attractive pops up once in a while. Given where you are, Durst is...
  32. Replies
    11
    Views
    1,191

    Re: Homemade LED light source is working

    Thanks Eric; that makes good sense. After posting I indeed figured the resistors were current dropping resistors to offload dissipation from the fets.
    Copy that on the virtual ground at 50mV for...
  33. Replies
    11
    Views
    1,191

    Re: Homemade LED light source is working

    It can be done. But it's more challenging than b&w multigrade. Eric's closed loop system (which I assume the photodiodes are meant for) might be useful, although it's not a necessity in my experience.
  34. Replies
    11
    Views
    1,191

    Re: Homemade LED light source is working

    Eric, nice work. Briefly checked the schematic on your blog; looks like a quite thoroughly engineered solution. I see you're using photodiodes to sense the output of the green & blue leds; is this...
  35. Re: How to avoid splotches on edges of negatives from drying

    I always hang the film from a corner using a clip and also attach a clip to the bottom corner. That helps the water to drip from the film. Remove the bottom clip after a few minutes when all water...
  36. Re: My new Jobo/Tmax 100 consistency problems solved

    Well, that already explains part of the problem. The clips/wings are in my experience necessary to get even development / prevent surge marks along the edges, at least with some film/developer...
  37. Re: Any tips for home brew developers for the TMax films?

    Just about anything will do. TMX is a great film and responds well to all kinds of developers. The people who say PMK, Pyrocat and D23 work well with it, are right. So are the ones who may (have yet...
  38. Re: developing with x-tol - agitation and Films

    With sheet film in trays I use the kodak agitation scheme. Works fine. For roll film I just use a Jobo with continuous agitation. Works fine too. Don't overthink it.
  39. Replies
    32
    Views
    1,804

    Re: RA4 - how to get things right?

    Exposure times of around 2-3 seconds are definitely on the short side because they're a bit difficult to reproduce depending on the equipment used. But they're not in reciprocity failure territory,...
  40. Replies
    9
    Views
    646

    Re: KRST as Fixer? Yeah...Why Not?

    "They say" selenium toning removes the pyro stain. I'm very skeptical - did you notice anything like it?
Results 1 to 40 of 2025
Page 1 of 51 1 2 3 4