Rodinal Stand Development -- Push?

[Freakscene]

I am thinking of just redeposition of metallic silver.

That's plating out development.

Well, Tri-X has quite silver rich emulsion and Rodinal is not that modern formula.

I'm referring to the film, not the developer. Current Tri-X is a very modern formula (including containing a lot of iodides) and has a very similar amount of silver per square centimetre of emulsion as almost all other modern films - the "silver rich" idea is only a myth.

Anyway today's developers from Ilford and Kodak still contain sequestering agents. Maybe they do not consider their emulsions that much resistant to silver redeposition after all.

Those are for sequestering divalent cations in the mixing water that can interfere with development, not silver.

But maybe you are right and increase in density is caused by prolonged action of p-aminofenol. In that case composition of used water will have much to do with Rodinal activity. Question to OP. What water did you use ?

The water isn't very relevant at all: the pH of Rodinal is close to 14.

Marty

 

[Leigh Youdale]

Thanks Roland.
You say 4ml vs 3 is contributing about one stop. Very interesting.
Rodinal is hard to measure in such small amounts. If it's that sensitive, I'll have to find a more accurate way to measure and deliver the Rodinal.

I use a 5ml or 10ml syringe, obtainable at my local pharmacy.

 

[Trius]

Hi Trius,

If it's stand (no agitation, or just once in the middle) and if the used dilution is the same, silver will have exactly the same amount of developer to interact with, so results will be the same. Film doesn't care if the tank has half a liter of mix or 1 gallon of mix, or if the total amount of Rodinal in the mix is 3 ml or 5 ml or 20 ml, as long as the same dilution is kept.

Cheers,

Juan

Juan: Well, some people are making claims otherwise, and I suspect they have not done the experiment I suggested. IOW, it's all opinion without real, peer-reviewed data. 😀

 

[timor]

The water isn't very relevant at all: the pH of Rodinal is close to 14.

Marty

Thanks Marty for clearing few thing for me.

 

[ferider]

Juan: Well, some people are making claims otherwise, and I suspect they have not done the experiment I suggested. IOW, it's all opinion without real, peer-reviewed data. 😀

Earl, I suggest you spend 5 minutes on the intertubes by Google'ing "para-Aminophenol Hydrochloride" and the various publications on its diffusion properties (it's also used as a hair dye). Juan might want to wikipedia the term "diffusion" first. 🙂

That's all for me in this thread, folks.

 

[Tom A]

Acros 100 @ 100 in Rodinal 1:100 semi stand development (agitation @ 5 and 15 min) for 25 minutes. Very low contrast structure, inside a hollow tree with the steel supports keeping it upright.
Nikon S2 and Nikkor 50f1.4.
I use straight tap-water for 90% of my developers. Only exception is with Pyrocat HD which is mixed with distilled water. The Acros 100 works well with stand development as it is a fairly contrasty film and the semi stand seems to level this a bit.
Exposure was 1/30 s and f1.4 here. It is rather gloomy inside that tree.

 

[Trius]

Earl, I suggest you spend 5 minutes on the intertubes by Google'ing "para-Aminophenol Hydrochloride" and the various publications on its diffusion properties (it's also used as a hair dye). Juan might want to wikipedia the term "diffusion" first. 🙂

That's all for me in this thread, folks.

Roland: I'm not contradicting anything you have suggested, nor anyone else for that matter. I'm just suggesting empirical data. 🙂

 

[Tom A]

Kodak XX in Rodinal semi stand development 1:100, 25 min and a "flip" @ 5 and 15 min. Film rated at 320 iso.

Leica M2, Zeiss ZM Planar 50mm f2.0 @ around f4.

 

[Trius]

1:100 ~19 minutes

 

[jan.smely]

Hey everybody,

I am facing a somewhat different situation, but still in relation with this interesting thread. I have no experience with stand development or push processing (I'm a beginner). I have shot one roll T-max 100 at ISO 6400 (6-stops under). It's some bar scenes in very poor lighting (typically, most of every image will be just darkness, from which some poorly illuminated faces would "stand out"). The only developer I have at hand is Ilford Ilfotec HC. Now, I am thinking about stand-developing this 6-stops underexposed film in very diluted HC (1+47 or 1+94). Is my idea any good? I plan to shoot a piece of another T-max 100 in the same light conditions with the same settings (ISO 6400) and try to develop its portions this way for different times. I would first try 1 hour, then add... What do you think? According to my very rough calculations, 6-stops underexposed T-max should be developed for at least 30 min in a standard way (every minute agitation) in HC (1+47). This process would obviously burn out highlights completely. So that's why I started to wonder about stand-development.

Any ideas are much appreciated!
Cheers,
Jan