Kodak D-76 used stock shelf life

[daliborwalk]

Hello, I have developed 2 film rolls in 1 liter of D-76 stock solution. May I used it again 2-3 days later to develop next film roll? D-76 solution still looks good after 2 days from the first developed 2 rolls - clear, no color (yellow) tint visible only on the walls of the storage bottle there are gray dots - probably reacted silver. Stored in a fully filled tightly closed bottle in the dark place at a room temperature (20°C).
My experience with x-tol stock solution - I am using it 3 days (for 1 batch of development each day) successfuly.

 

[Bill Burk]

I’m sure it’s fine and you probably don’t even have to adjust development time yet because you haven’t used much of its capacity.

I usually get 8 rolls from a Liter of stock D-76 but I use it one shot 1:1.

After a couple more rolls you might add some development time, maybe fifteen percent on the fifth and sixth rolls to maintain contrast.

 

[daliborwalk]

I’m sure it’s fine and you probably don’t even have to adjust development time yet because you haven’t used much of its capacity.

I usually get 8 rolls from a Liter of stock D-76 but I use it one shot 1:1.

After a couple more rolls you might add some development time, maybe fifteen percent on the fifth and sixth rolls to maintain contrast.

Thank you Bill!

 

[koraks]

only on the walls of the storage bottle there are gray dots - probably reacted silver

The silver will stay in the film. Gray dots are probably oxidized developer.

Stored in a fully filled tightly closed bottle in the dark place at a room temperature (20°C).

It should keep fine for a long time this way.

 

[daliborwalk]

The silver will stay in the film. Gray dots are probably oxidized developer.


It should keep fine for a long time this way.

Gray dots - OK, thanks.

It should keep fine for a long time this way - even though it has already been used to develop 2 films?

 

[Agulliver]

It's probably good for at least 3 months stored that way.

 

[daliborwalk]

It's probably good for at least 3 months stored that way.

Thank you!

 

[bernard_L]

on the walls of the storage bottle there are gray dots - probably reacted silver

Alarm bell ! Not concern about the activity of the developer, but about cleanliness. You don't want any of these particles to freely float and stick to the surface of your film. If I were you I would filter the developer into a clean bottle.

Tip: to clean the inside of a glass bottle, half-fill it with water and add a spoonful of sand. Shake vigorously until the walls are clean. No nasty chemicals involved.

 

[Agulliver]

The other thing you can do is filter the solution to remove the grey particles suspended in it.

I was once given a storage bottle which had previously been used in a person's darkroom for a couple of decades....the entire inner surface was covered in grey particles!

 

[koraks]

It should keep fine for a long time this way - even though it has already been used to develop 2 films?

Yes, that doesn't really matter. Having developed a couple of rolls of film has oxidized a small percentage of the developing agents - but that's really quite minimal. The main threat to a developer is oxidization by air. As long as you keep it in a hermetically sealed container (e.g. a glass bottle that's entirely full with a properly fitting screw cap), essentially only the air dissolved already in the water poses a risk. In a formulation like D76, the sulfite will be sufficient to get rid of that; as long as there's no supply of fresh air/oxygen to the developer, the oxidization process basically halts very soon after you've closed the bottle.

The other thing you can do is filter the solution to remove the grey particles suspended in it.

That will help cosmetically, but I don't think it does much or anything for the shelf life of the developer as such. I can see how the particulate matter may worry some; if so, filtration is a perfectly fine solution.

 

[Saganich]

I use marbles to reduce the head space in bottles and that makes a huge difference. Kudos for the sand idea btw, I'll have to try that one. Coffee filter works...here is an old thread about coffee filters.

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