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Photo Forum / Film Photography / Darkroom / March 2005tmax 400 / D76 Dilutions and times
can someone direct me to a place where i can find developing times for max 400 and D76 at dilutions greater than 1:1 (1:30, 1:60, you get th drift). any help would be appreciated -- chewbacca36 > can someone direct me to a place where i can find developing times for t > max 400 and D76 at dilutions greater than 1:1 (1:30, 1:60, you get the > drift). any help would be appreciated. Here: http://www.kodak.com/global/en/professional/features/featuresIndex.jhtml Greetings, Hans > can someone direct me to a place where i can find > developing times for t > max 400 and D76 at dilutions greater than 1:1 (1:30, 1:60, > you get the > drift). any help would be appreciated. Probably what you are trying to do is stand or stagnant development. I think you are going to have to experiment and possibly use development by inspection. Times for ID-11, which is essentially the same as D-76, are given for 1:3 but not for higher dilutions. At the very high dilutions you mention D-76 will be very inactive and may not develop at all. As a first step I would try a clip test. That is, take a scrap of the film you are interested in developing and place it in a little of the developer _in the light_. See how long it takes to begin to blacken and how long it takes to develop to some reasonable density. Since the film is fogged it will show if the developer is capable of developing at such high dilutions and give you some rough idea of how long development must be continued. Stand or stagnant developent, that is development without agitation, is supposed to take advantage of local exhaustion effects to yield exagerated edge/border effects and to produce a significant shoulder on the film compressing the highlight contrast, and effect known as compensation. The result is a distorted gray scale which might be desirable for some subjects. There really is no other advantage for highly diluted developers. Note that Rodinal is commonly used at the above dilutions but its a very highly concentrated stock solution that is at its normal activity level at around 1:25 to 1:75, D-76 is at its normal activity when used full strength. Rodinal at 1:25 is at about the same activity level as full strength D-76.  Signature--- Richard Knoppow Los Angeles, CA, USA dickburk@ix.netcom.com > Stand or stagnant developent, that is development without > agitation, is supposed to take advantage of local exhaustion > effects to yield exagerated edge/border effects and to > produce a significant shoulder on the film compressing the > highlight contrast, and effect known as compensation. That sounds really cool! What does the end result look like? - max > > Stand or stagnant developent, that is development without > > agitation, is supposed to take advantage of local exhaustion > > effects to yield exagerated edge/border effects and to > > produce a significant shoulder on the film compressing the > > highlight contrast, and effect known as compensation. > That sounds really cool! What does the end result look like? Bromide streaks. Spent developer is denser than fresh: as it exhausts it falls down the emulsion leaving a less developed streak of film in it's wake. Especially prominent around sprocket holes. I have tried to get this edge effect/dilute developer thing to work and never got anywhere. But I need pretty strong proof before I believe. Subtle effects for the 'golden eyed' cut little mustard with me. I think if the diluted developer/edge effect thingy was going to work it would have to be with the negative developed flat on its, emulsion side up. If edge effects are what is wanted then unsharp masking is a better way to go. http://www.imx.nl/photosite/technical/Filmbasics/filmbasics.html SignatureNicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. To reply, remove spaces: n o lindan at ix . netcom . com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ What's unsharp masking? - max >>> Stand or stagnant developent, that is development without >>>agitation, is supposed to take advantage of local exhaustion [quoted text clipped - 21 lines] > > http://www.imx.nl/photosite/technical/Filmbasics/filmbasics.html > What's unsharp masking? It is a technique in which you make a slightly out-of-focus print on transparency, develop and dry it, then use it in a sandwich contract print (or possibly a projection print). It has the effect of sharpening the boundaries of certain contrasty areas. >>>> Stand or stagnant developent, that is development without agitation, is >>>> supposed to take advantage of local exhaustion effects to yield >>>> exagerated edge/border effects and to produce a significant shoulder on >>>> the film compressing the highlight contrast, and effect known as >>>> compensation. Unfortunately, edge effects caused by processing rarely, if ever, show up after enlargement, and in fine-grain low-degree enlargements or contact prints they never show up. If you want to see edge effects, try using Tri-X 35mm with a properly focused image developed in Rodinal and enlarged to 11x14. Grain is your friend. Or not. >> Bromide streaks. I have never had bromide streaks with stand development. Specifically, Agfa APX 100 120 in Rodinal 1:150 at 50 minutes. > Nicholas O. Lindan wrote: > > If edge effects are what is wanted then unsharp masking is > > a better way to go. > What is unsharp masking. Google does seem to obfuscate things with all this digital hoopla. From the book "Way Beyond Monochrome" www.ktphotonics.co.uk/pdf/UnsharpMasking.pdf I didn't know excerpts were on the web ... This is one superb book, BTW. The 'Desert Island' book of B&W printing: http://www.ktphotonics.co.uk/main.html SignatureNicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. To reply, remove spaces: n o lindan at ix . netcom . com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ > can someone direct me to a place where i can find developing times for t > max 400 and D76 at dilutions greater than 1:1 (1:30, 1:60, you get the > drift). any help would be appreciated. > > -- > chewbacca36 D-76 should not be diluted more than 1:1. It does not have sufficient activity at higher dilutions. Microdol-X and Perceptol would be better choices, but in no event will 1:30 or 1:60 dilutions be usable. > D-76 should not be diluted more than 1:1. It does not have sufficient > activity at higher dilutions. > > Microdol-X and Perceptol would be better choices, but in no event will > 1:30 or 1:60 dilutions be usable. It can be used 1+3 on TMax, Neopan, HP5+, etc., not even necessarily pulled. > > D-76 should not be diluted more than 1:1. It does not have sufficient > > activity at higher dilutions. [quoted text clipped - 3 lines] > > It can be used 1+3 on TMax, Neopan, HP5+, etc., not even necessarily pulled. 1+3 is not a recommended dilution. D-76 has only 2g/ltr metol at full strength! |
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