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  1. Replies
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    Re: Step wedge film test question

    The biggest reason is flare in the enlarger.

    The second reason is stray light that bounces from the illuminated parts (shadows) of the projected image, on to the walls and ceiling, and and then...
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    Re: Almost complete camera, a few questions!

    Gott im Himmel that thing is massive. From the catalog, it looks like it is their "Mark V" copy camera. Well, it's massive for an 8x10 camera, but puny by the standards of copy cameras.

    I would...
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    Re: Marking negatives

    Kohinoor makes a non-clogging ink http://www.dickblick.com/products/koh-i-noor-rapidograph-ultradraw-waterproof-ink/

    Of course, it still clogs, it just takes several weeks instead of several days....
  4. Re: Large developing trays for roll paper 47" wide

    I don't know what happened to him. The last internet activity was 2009 or so. The web site is still up, and googling shows he's still in the phone directory.

    Anybody have any recent news?
    ...
  5. Re: Large developing trays for roll paper 47" wide

    Well, there is Lloyd Erlick, in Toronto, who uses a single flat tray technique, though only for up to 24x30:

    http://www.heylloyd.com/technicl/single.htm

    I've not tried it myself.
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    Re: Step wedge film test question

    Grade 2 paper has about 5 stops (1.5 OD) of exposure range between black and white. Its contrast in the middle of the HD curve is 0.5 stops of exposure (equivalent to 0.15 OD) per print tone zone.
    ...
  7. Re: Plastic trays: What adhesive for fixing cracks?

    Epoxy-fiberglass works best. Silicon RTV doesn't work. You can get an epoxy fiberglass kit at Walmart or an auto-parts store. Be sure to rough up the surface with some coarse sandpaper before...
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    Re: Macbook Pro's "moisture sensor"

    Medical equipment has moisture sensors that shut the machine down - permanently - if they ever get tripped. Count your lucky stars.
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    Re: Advena lens stage adjustment

    Misread that in haste - it isn't parallelism you are adjusting for.

    By tightness I assume you mean the lens stage doesn't stay where you put it.

    If this model is adjusted by handwheels then I...
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    Re: Advena lens stage adjustment

    Those look like the adjustments for the rollers that ride on the upright column.

    If they are also the adjustment for lens stage parallelism I'd say you have a real chore ahead of you. I'd advise...
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    Re: Durst L1200 maximum print size

    I can't think of any reason for a stop in that position unless it is to keep a very-recessed lens from hitting the negative - but then without the clip one wouldn't need to recess the lens. I can't...
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    Re: Infrared Exposure Meter?

    I find just setting a plain-ole Sekonic 398 - the type with a selenium cell - to ASA 6 [well, ASA 12 and doubling] gives very good results with the near-IR films and a #72 filter.

    If you want to...
  13. Thread: Photo Wipes?

    by nolindan
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    1,505

    Re: Photo Wipes?

    I was about to suggest Job Squad paper towels - lintless and very tough - but I see they have been discontinued.

    Try buying a bundle of microfibre cleaning cloths at Cotsco. True, you have to...
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    Re: Poll: Do you use distilled water?

    Distilled water for
    Microdol-X stock & diluent
    Technidol diluent
    Rodinal diluent
    PhotoFlo diluent

    Cleveland tap water can really interfere with dilute developers.

    Filtering won't turn...
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    Re: TS-4 Odorless Stop Bath

    Ooops - mistake in that table - that's 73g/100ml for Citric Acid - or 730g/l - I should know better ... one can almost make citric acid into a syrup.

    So, from the MSDS it definitely isn't Citric...
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    Re: When to use hypoclear?

    Before it's true composition was known S. Thiosulfate was thought to be S. Hyposulfate - hence the 'hypo' nickname.

    "Hypo", then, refers to both S. Thiosulfate of traditional acid fixers and the...
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    Re: TS-4 Odorless Stop Bath

    Subdividing the powder can work quite a bit better than you might think. It works best with Kodak powders - Kodak adds/coats/hypnotizes chemicals so they mix well as powders and stay mixed. ...
  18. Re: Best B&W film/developer for scanning (that's not bad for optical prints either!)?

    The best film for scanning is color negative. Convert to black and white in software.

    I've always had much better results scanning a print than scanning a B&W negative.

    YMWV.
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    Re: Kodak increasing film prices by 15%

    And so would Kodak...
  20. Re: Arista.edu Ultra 400 light line down one side.

    I'd vote that it is a problem in the manufacturing of Arista EDU Ulta 400 (rebranded Forte?).
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    Re: Very Large VC Filters

    To really get to a #5 filter you may want to get 'bluer' than primary blue. I think "Congo Blue" is the deepest, but it is a pretty low transmission.
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    Re: Keeping Developer Warm

    Heating pads from the drugstore will get that hot (well, it isn't that hot - body temperature really). You would probably want two for a 20x24 tray. Keep something thermally insulating between the...
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    Re: nd in enlarger?

    ND optical filters are wickedly expensive.

    Rosco Cinegel ND sheets are $6 for a 20x24" sheet and available in N.3, N.6 and N.9 (1, 2 & 3 stops). The optical quality is as good as a Wratten gel. ...
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    Re: perimeter fog on Azo paper

    Older paper was resistant to age fog because it contained cadmium. Cadmium was removed from paper sometime in the 90's. Paper made just after they removed the Cd fogs like crazy - they have since...
  25. Re: How do you work with transparencies in the darkroom?

    Agreed.

    Chromes are for projecting, not printing.

    Of course, this being LFF, you would need a 4x5 auditorium projector...
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    Re: Metone Aluminum Plates

    See the MSDS for plate 'developers':

    http://www.lacrosselitho.com/ShowProduct.asp?nav=yes&L1=products&L2=prepress&L3=plates+%26+plate+chemistries&TP=kodak&SP=-116591856&CID=1004

    Best just to go...
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    Re: Metone Aluminum Plates

    Offset lithography - they are plates for a printing press. Google doesn't come up with anything for 'metone' or 'blishen'. They are likely quite old and may no longer be much good for anything...
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    Re: Your thoughts on printing.

    Dichroic filters don't fade - but then one almost never sees a 'naked' dichroic filter. They are backed up with a dye filter, which does fade. As the dichroic filter is close to the light source...
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    Re: Edwal FG7 discontinued?

    I was under the impression that benzoquinone http://en.wikipedia.org/wiki/1,4-Benzoquinone is oxidized hydroquinone http://en.wikipedia.org/wiki/Hydroquinone.
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    Re: B+W Processing Issue - Advise

    Change labs. Whatever it is, it is the lab's fault. And the lab should have noticed something is seriously wrong...
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    Re: 20x24 RA-4 ~ Need Help

    I think you would need 8" diameter pipe -- pi * d = 3.14 * 8" = ~25"

    You could use 6" pipe x 24 long if you are willing to have a 18.5" x 24" print, which is closer to a 35mm / 6x9 form factor.
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    Re: How to reduce?

    Yup. And you might need to raise the easel on a box or something to get it closer to the lens.

    A 50mm lens will give you a 35mm negative sized print, a 105mm lens will give a 6x9cm print, a 150mm...
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    Re: Kodak 5x7 Enlarger and an Aristo EK-SP

    Cold lights get brighter as they warm up. Some Aristo heads have heaters in them in an attempt to keep the lamp warm - the heater is kept plugged in throughout the darkroom session.

    A...
  34. Thread: Dry darkroom?

    by nolindan
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    Re: Dry darkroom?

    I have made dry darkrooms into temporarily wet darkrooms by running garden hose from either the laundry sink taps or from taps installed under a bathroom sink. If you bring in hot water you may need...
  35. Re: Is Anyone Having Problems With Light Impressions?

    That letter sounds like it was written in Nigeria: grammar to make a 7th grader blush; anonymous salutation; and signed by a nameless 'Team'. What next: "In order that We Can Process your Refund for...
  36. Maximum Dodging Sequences - Darkroom Automation Application Note

    If you have ever been frustrated when trying to do multiple dodges one after the other, and have run out of time, there is an application note on the Darkroom Automation support files web page that...
  37. Thread: Keepng warm

    by nolindan
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    2,679

    Re: Keepng warm

    Electric heater that looks like one of the oil filled ones but uses heated metal plates instead. I keep a small oscillating fan going to even the heat.

    I also use a heating pad under the...
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    Re: Registration Punch? No?

    You don't need to use a pin bar - loose pins work just as well, if not better. You do have to be a bit more careful though. The pins on a pin bar can be fixed or they can be loose and slide along...
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    Re: De-bossing mat board for small prints

    A back of the envelope calculation says a small book press, well greased, should be able to put down 8,000 lbs of force without much problem. Over 40 square inches that would be a pressure of 200...
  40. Re: problems with macbeth transmission densitometer

    Bill's right - needed for an S-4 cathode photomultiplier tube so that it has about the same intensity response as the eye. PM tubes aren't a first thought when it comes to ordinary optical...
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