I was just looking up a developing time on the Massive Developing Chart, and I saw a suggested time for D76 diluted 1:3. I always use it 1:1.
Why might one want to dilute it further, other than saving the quantity? How might the results differ?
Thanks.
You don't really save any D76 by diluting it; you still need the same amount of "stock" developer (as initially mixed out of the package) per roll of film, regardless how you dilute it.
The biggest concern with more dilute versions of D76 is that you need to use enough of it in your developing tank to avoid un-intended developer exhaustion.
Made a one shot batch, 500ml. 125ml of stock developer to 375ml of water. 20 minutes at 20C, agitations every minute. Two 36 exposure rolls in the tank. At this rate, it should be good for 16 rolls per liter. This way, I can use up a liter of stock before making up the next batch. I don't use it fast enough to keep a gallon around but can finish off a liter well before it expires.
Just put a single roll in that 500 ml tank of 1+3 D76 and you will be fine - provided you add 10% to the recommended times.
Will do! I really like the results.
It appears from what I see that your negs and prints are fine with 125ml stock for 2 films. Were you just lucky and had the scenes and negatives demanded more stock as might be the case on another occasion depending on the scene and lighting would your luck have ran out? Well I cannot swear that it would not but I am wondering about whether any other scene and light conditions would have tipped the balance into producing a secondbest outcome that would have produced negatives that did not meet your requirements
As will be clear from the above I do wonder how much of a serious risk you run in the future having used 125ml with success
We are back to the old argument about the nature of minimum levels of stock and I have been in the same situation as you . In my case it was Ilford's Perceptol. Some say that as Ilford states that 1L of Perceptol does 4 film this means that Ilford recommends a minimum of 250ml of stock per film
I used 62.5 mls for a 1+3 dilution for a 250ml tank and the negs and prints( in my case darkroom prints) looked fine to me and others who viewed the prints.
As a result of mentioning this in a discussion I was told that I was "dicing with death" in terms of satisfactory negative outcome. I then decided to write to Ilford and they replied that 62.5 ml was on the limit and they suggested that 70ml would be better What they did not do was point me to their Perceptol does 4 films per litre of stock and politely or otherwise ask what I thought I was doing as well you might if someone was attempting to climb Mount Everest in trainers and pullover
I throw this in for your consideration
pentaxuser
It appears from what I see that your negs and prints are fine with 125ml stock for 2 films.
Maybe for scanning the density range is good.
I've always wondered what the difference is between controlling contrast by limiting time and controlling it by allowing the whole tank of developer to become exhausted. I'm not referring to local exhaustion due to less agitation.
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