I am 74 mL short of Ilford DDX. How much should I increase my development time to compensate?

[Certain Exposures]

I have 140 mL and I need 214 mL. Should I toss it or is there a formula I can use to extend development time to compensate?

 

[gbroadbridge]

Are you not planning on buying another bottle?
I would not mix a weak developer solution and try to compensate with extra time.
If you are getting another bottle just top up from the new bottle

 

[Certain Exposures]

No, I am not planning to buy another bottle any time soon. I typically reserve DDX for special occasions due to its cost.

Tonight is an exception because it is my only 'fresh' developer in stock and I need to do a quick test.

 

[Bill Burk]

Just grab the time from Massive Dev Chart for 1+9 if you can't make 1+4

 

[Rayt]

I have used 1:7 and 1:9 DDX with success for sheet film. I:7 is also what I use for TMax developer. I wouldn’t do 1:9 again just that one time but it was fine. I have also reused DDX 1:4 for more than one run just added some time. I don’t recall the times but they are online.

 

[gbroadbridge]

Just grab the time from Massive Dev Chart for 1+9 if you can't make 1+4

Keeping in mind that 1+9 is not a dilution recomended by Ilford.

There are all types of nonsense in the Massive Dev chart - but if you're that way inclined ...

 

[Certain Exposures]

Thanks @Rayt and @Bill Burk .

There are all types of nonsense in the Massive Dev chart - but if you're that way inclined ...

I decided to toss the little remaining DDX and use the bottle of several-years-expired Kodak HC-110 that I have been working my way through. The film itself expired in the 1960s ('63 if I recall the sticky note on the bulk loader). Don't tell Alan...

Ironically, Kodak's published time for Tri-X in dilution B is about as controversial as doing DDX 1+9. I decided to give 6 minutes a try (7 after adjusted for temperature).

 

[gbroadbridge]

Ironically, Kodak's published time for Tri-X in dilution B is about as controversial as doing DDX 1+9. I decided to give 6 minutes a try (7 after adjusted for temperature).

I guess my point is that if you're going to use the premium Ilford developer you may as well use it as designed.

Personally, I tried it and found the difference to be marginal at best and moved back to different dilutions of ID11/D76 which do everything I need in my workflow.