D-76 mixed at wrong temp

ericdan · Nov 9, 2014

I mixed a liter of D-76 at room temperature instead of the recommended 40-50 degrees.
Does anybody have negative experience with this? I developed two rolls of HP5 and one roll of Tri-X in it at my usual times. I swear I can't tell any difference. Does the mixing temperature really need to be that high?

MattKing · Nov 9, 2014

ericdan said:
I mixed a liter of D-76 at room temperature instead of the recommended 40-50 degrees.
Does anybody have negative experience with this? I developed two rolls of HP5 and one roll of Tri-X in it at my usual times. I swear I can't tell any difference. Does the mixing temperature really need to be that high?

Did it all dissolve?

ericdan · Nov 9, 2014

Yes. Two jugs and I just poured it back and forth until it was dissolved.

summicron1 · Nov 9, 2014

if it is all dissolved, ur good. I've mixed it too cold and had it not dissolve, leaving a hard lump at the bottom that refused to go away until I poured some out, heated it in the microwave, poured it back in, lather rinse repeat until it was hot enough to dissolve the lump.

You use hot water to speed dissolving. If yours did, ur good.

Go and sin no more...

ericdan · Nov 9, 2014

I always use the same bottled water for mixing up developer. That bottle must've been warm enough to dissolve everything but I'm sure it wasn't 40 degrees.
Anyways, I have more film to develop…

Truzi · Nov 9, 2014

I just use hot tap water and don't worry about the temperature. As stated above, as long as it dissolved, it will be fine.

tkamiya · Nov 9, 2014

I've done it both ways; room temperature and according to the instructions.

It is significantly more difficult to get everything to dissolve at room temperature water, but it worked just the same. My understanding is, the water must not be too warm, but as long as it everything is dissolved, there's nothing to worry about.

gone · Nov 9, 2014

Try TD-16 if you get a chance. Same tonality as D76, easier to mix up, and my plastic bottle of it is close to 4 months old now. W/ D76, in my hot Florida climate, after 3 weeks or so the PH would rise, grain would increase, and I had to toss it.

ericdan · Nov 9, 2014

Never seen that on the shelves here. I usually run through my 1 liter stock fast enough not to have to worry about shelf life.

Xmas · Nov 9, 2014

ericdan said:
Never seen that on the shelves here. I usually run through my 1 liter stock fast enough not to have to worry about shelf life.

Hi Ericdan

Dont worry the kodak D76 powder is not what people scratch mix - normally but a clone that has longer shelf life as stock or for 1+1, etc.

The original was for movie and replenish where pH would be controlled day to day, D76a or D76d are pH buffered versions for stock bottle.

http://www.lostlabours.co.uk/photography/formulae/developers/devD76_variants.htm

My stock clones keep ok for 6 months though Id be nervous at that age.

Noel

jimjm · Nov 9, 2014

As mentioned, if the powder dissolved completely then you should be good to go.

My only concern would be the amount of stirring/mixing required to get there. I'd imagine one of the reasons for using hot water is to encourage the powder to dissolve quicker without too much stirring. The more air introduced into the stock solution at this point, the shorter your useful shelf life of this batch. Since you go thru yours pretty quick, it may not be an issue at all.

Gerald C Koch · Nov 10, 2014

Using hot water is more of a convenience than anything else. Much is made of oxidation during mixing. We all no the old dictum to first add a pinch of sulfite before adding the other ingredients. BUT it really doesn't make much difference except for VERY dilute developers.

LikeAPolaroid · Nov 10, 2014

momus said:
Try TD-16 if you get a chance. Same tonality as D76, easier to mix up, and my plastic bottle of it is close to 4 months old now. W/ D76, in my hot Florida climate, after 3 weeks or so the PH would rise, grain would increase, and I had to toss it.

TD16 is D76 original formula plus a buffer to avoid pH instability which is notorious to happen with the original developer formula. In my view, D76-H as designed by Haist is the best D76 version with completely identical properties and results.

trendland · Aug 30, 2017

In general one could say : "You can't mix your devellopment powder with wrong temperature"
The temperature is allways OK (not with very hot water of course) if you mixed your developer substances.
If you can't mix it all to a total disolve you have a problem.
But in this case it is NOT mixed......

.

with regards

trendland · Aug 30, 2017

Gerald C Koch said:
Using hot water is more of a convenience than anything else. Much is made of oxidation during mixing. We all no the old dictum to first add a pinch of sulfite before adding the other ingredients. BUT it really doesn't make much difference except for VERY dilute developers.

Because this "reaction" of oxidation is within the formulation.
So all developers are not fully exausted after developing the max. recomanded films.
I personaly found out that the exaustion of deluted D76 is first with more than the double recomanded films.
Or let me say D76 can develop films with a "reserve" power more than a double.
But I also have to state : The quality of the developed films seen in the negatives
after this experiments wasn't the very best....

.
But it wasn't so worste in any way.
Worste in any way was the experimental
result with D76 delution 1+7 ......

because it was indeed exausted before temperated devellopment > 35 min. comes to its end.
(with 20 degree C the expected full time
of development was over 1hour 15!

with regards

D-76 mixed at wrong temp

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