d-76 stock how many rolls before replenish or toss

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peter k.

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Had a note on this, but it has disappeared. If memory, ha, serves me right it was 4 rolls of 35mm or 120.
 

R.Gould

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I have used D76 stock following the Ilford suggestion, first film at standard time then each film following ad 10,20,30,40,50,60,70,80 and 90% for film 10, which works fine, always got 10 films per litre of Stock, I have given up D76 as it has shot up in price over here, and now use ID11, following the same as above, as set down by Ilford, with both last film as good as first, id11 and d76 are virtualy the same developer.
 

Donald Qualls

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If you're replenishing, you should do so after each developing cycle -- tank of one film, replenish the correct amount for one film. Tank of four films (I can fit 4x120 in a "three reel" Paterson tank by double loading), replenish for four films -- but do so with each process cycle; don't try to process two four-roll tanks without replenishing in between The whole point of replenishment is to give a consistent result, one roll after the other, for as long as possible. Intermittent replenishment just ensures you won't get that.

If you're going to reuse stock with extended time, I'm sure Kodak published information on either how many rolls you can get per liter or alternatively how long you can extend the development before the developer is too weak to produce top quality results (meaning, you can go further, but you'll start to see loss of negative quality -- which might vary depending how exposed the film was that you've developed up to that point).
 

Ian Grant

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I've never replenished after each development cycle, when depends on the volume but in a Gallon UK) deep tank that was often after 20-30 filmd or the equicalent 80 to 120 5x4 sheets, With my later 2.5 litres of stock I replenished every 10 films, Never any issues.

One thing you have to remember isusually replenishment errs on the over cautious and in reality as long as you know what you are doing you can get away with much less - but only with experience.

Ian
 
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MattKing

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Just a reminder that neither D-76 nor ID-11 offer a store bought replenisher any more. The fact that ID-11 comes in two packages instead of the single package for D-76 turns out to be an advantage, because it permits using a partial package as replenisher - the instructions are on the Ilford website.
There is no current D-76 datasheet, but here is a link to a recent one: https://125px.com/docs/techpubs/kodak/j78-2017.pdf
 

Donald Qualls

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If you can operate a "dealer's scale" -- sub-gram precision, up to a hundred grams or so capacity -- you can pretty readily make up D-76R replenisher. It's a little more complicated than mixing the developer by pouring the contents of the envelope into warm water, but no more so than mixing the developer from basic chemicals. Five or six ingredients, none in micro quantities.
 

Ian Grant

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If you can operate a "dealer's scale" -- sub-gram precision, up to a hundred grams or so capacity -- you can pretty readily make up D-76R replenisher. It's a little more complicated than mixing the developer by pouring the contents of the envelope into warm water, but no more so than mixing the developer from basic chemicals. Five or six ingredients, none in micro quantities.

My main electronic scales only weigh to +/- 0.1g, but for just under £10 (roughly 13$) I bought a small "dealer.s scale" that's accurate to +/-.01g, and both are accurate accoring to my calibration weights. I do have a Beam balance that'll go to +/- 0.001g but that's overkill.

Ian
 

Donald Qualls

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My main electronic scales only weigh to +/- 0.1g, but for just under £10 (roughly 13$) I bought a small "dealer.s scale" that's accurate to +/-.01g, and both are accurate accoring to my calibration weights. I do have a Beam balance that'll go to +/- 0.001g but that's overkill.

Ian

For most photographic formulae I've seen, 0.1g precision and good calibration is sufficient -- you'll usually make up an intermediate known strength solution if you need less than a few tenths of a gram, say of phenidone for a single-tank batch of H&W Control -- but given the low prices of the "dealer scales", if they'll handle the quantities needed (up to 100 g should be enough for mixing a liter at a time of almost anything except fixer, and that doesn't require higher precision than a kitchen spring scale), there's no reason to avoid higher precision -- and the tiny electronic scales are far simpler to use (and easier to tare) than a lab beam balance (as well as far less likely to be damaged in ordinary use, or need recalibration just from sitting). Given the level of PITA to measure anything more than 500 grains (= 33+ grams) on my reloading scale, I'm likely to spring for one of the little electronic ones next time I'm getting ready to mix chemicals.
 

chriscrawfordphoto

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Just a reminder that neither D-76 nor ID-11 offer a store bought replenisher any more. The fact that ID-11 comes in two packages instead of the single package for D-76 turns out to be an advantage, because it permits using a partial package as replenisher - the instructions are on the Ilford website.
There is no current D-76 datasheet, but here is a link to a recent one: https://125px.com/docs/techpubs/kodak/j78-2017.pdf


Actually, there is! Here's a link to it on Kodak Alaris's website. It is actually the same version you posted a link to, but it is the latest one from Kodak and is available on their site.

https://imaging.kodakalaris.com/sites/uat/files/wysiwyg/pro/chemistry/j78.pdf
 
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peter k.

peter k.

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Thanks for all your reply's, but were talking using D-76 just as stock, not replenished.
The note we had stated how many rolls or sheets one could use, and start with another small batch of fresh D-76 from a already mixed stored container.
Thought it was from a Kodak tech sheet but could not find it in either of the two given in post 8 or 12.
Most likely from another source here on the forum, but the other day could find noting archived.
 

takilmaboxer

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The Kodak recommendation is 16 (sixteen) 35mm or 120 rolls per gallon without replenishment. That's 4 rolls per quart. My experience over the last 30 years is that this is a good recommendation.
Be careful with the Tmax films. D-76 activity gets higher with them over time resulting in denser highlights and loss of shadow detail.
 

MattKing

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Actually, there is! Here's a link to it on Kodak Alaris's website. It is actually the same version you posted a link to, but it is the latest one from Kodak and is available on their site.

https://imaging.kodakalaris.com/sites/uat/files/wysiwyg/pro/chemistry/j78.pdf
Just a warning, Kodak Alaris advised me that that version is out of date, and has been pulled from the website until it can be updated. That link may be a cached version, or maybe it still shows on some of the regional versions of their website. When I access the Kodak Alaris chemical page on their website, it shows this way:
upload_2021-1-2_9-54-20.png


The link to that page is this: https://imaging.kodakalaris.com/photographers-photo-printing/resources/chem-tech-info
With the way the Kodak Alaris site is structured, it is possible that people in different parts of the world will have that link re-direct to different pages.
I don't know how long it will be before the information pages for the chemicals and colour paper and lab related products will be moved to sites maintained by and identified as Sino Promise Group.
 

Ian Grant

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We have to be careful, the type of film can affect the Replenishment rate, Tmax in particular with it's high Iodode conent needs larger volume of Replenisher than say Plus X or FP4.

Ian
 

chriscrawfordphoto

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Its funny that they removed the link to the D-76 PDF, because the links to the tech sheets for HC-110 and Tmax Developer still go to the 2017 versions of those publications despite the "New Formula" announcement on the page where the links are.




Just a warning, Kodak Alaris advised me that that version is out of date, and has been pulled from the website until it can be updated. That link may be a cached version, or maybe it still shows on some of the regional versions of their website. When I access the Kodak Alaris chemical page on their website, it shows this way:
View attachment 262789

The link to that page is this: https://imaging.kodakalaris.com/photographers-photo-printing/resources/chem-tech-info
With the way the Kodak Alaris site is structured, it is possible that people in different parts of the world will have that link re-direct to different pages.
I don't know how long it will be before the information pages for the chemicals and colour paper and lab related products will be moved to sites maintained by and identified as Sino Promise Group.
 

MattKing

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The New Formula T-Max and HC-110 supposedly perform equivalently, using the same times.
I expect the biggest reason that the D-076 pdf is out of date is its references to the no longer produced replenisher.
 
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