Pushing reversal question

[Wade]

I shot some UN54 in the underground, subway, in Los Angeles, and figured it needed to be pushed two stops. It turned out okay—my first B&W reversal processing. When I was in the middle of processing I realized I hadn’t even considered lengthening the second development time. Using D19 at 20C it is normally about 3 minutes. I went four minutes, and the Powell tank I was using has a long pour time, so it was about 4:30. But, pushing it two stops, should I have developed it for six minutes? Is it even necessary to increase the second development time while pushing?

The second question is in regards to the grain. I expected increased grain. Isn’t there a chemical – is it thyocyanide—when added in the process somewhere, that changes the edge of the silver crystals basically making it appear slightly less grainy? Seems like I read that somewhere, but I haven’t been able to find the reference again.

I have a question about flashing, but I’ll make that a separate thread.

Here is the link to the footage: https://vimeo.com/139887229

[unsanity]

Pushing reversal film is all in the first development stage. The second development stage only develops the remaining silver in the film. Under development is possible in the second stage but over development is not. I usually develop for 6 minutes with the second developer just to make sure the film is fully developed out.
Julian

[nikonr10]

Pushing reversal film is all in the first development stage. The second development stage only develops the remaining silver in the film. Under development is possible in the second stage but over development is not. I usually develop for 6 minutes with the second developer just to make sure the film is fully developed out.
Julian

Just add my 50 cents here ,The bleach is always the key to this, What bleach did you uses ?/ as well as what dev for 1st then 2nd along with temps of chems as well as process times , also when filming did you plan for this in your shoot , ie , under or over exposed ?

There is alot to learn in this B/W reversal process , And so many ways you can go with it . also so many mistakes . it takes time to get it right .

[aj]

Bleach has no influence on grain at all. It oxidizes away (bleaches) the exposed/developed silver-halides. After which re-exposure will blacken the remaining stuff which will after second developer show the positive image. The only important thing is that bleach is active. I.e. not depleted. The purple Kalium-permanganate must be used immediately after preparation.

http://super8.nl/english/e_index.htm

Grain-appearance stems from the film-properties and the developer

[Wade]

The only important thing is that bleach is active. I.e. not depleted. The purple Kalium-permanganate must be used immediately after preparation.
Grain-appearance stems from the film-properties and the developer

Actually, I used Dichromate, which lasts a relatively longer time, I think?

The second question is in regards to the grain. I expected increased grain. Isn’t there a chemical – is it thyocyanide—when added in the process somewhere, that changes the edge of the silver crystals basically making it appear slightly less grainy? Seems like I read that somewhere, but I haven’t been able to find the reference again.

I believe I finally did find the reference, although it pertains to print film. It has to do with solvent vs. non-solvent developers. Bottom line, a solvent-developer, non-diluted, will generally give a "softer" (i.e. less grainy look) than a non-solvent developer like Rodinal. I'm not even sure this can apply to motion picture film developing. I used D19 at 20C--pushed two stops for 14 minutes.

[nikonr10]

I shot some UN54 in the underground, subway, in Los Angeles, and figured it needed to be pushed two stops. It turned out okay—my first B&W reversal processing. When I was in the middle of processing I realized I hadn’t even considered lengthening the second development time. Using D19 at 20C it is normally about 3 minutes. I went four minutes, and the Powell tank I was using has a long pour time, so it was about 4:30. But, pushing it two stops, should I have developed it for six minutes? Is it even necessary to increase the second development time while pushing?

The second question is in regards to the grain. I expected increased grain. Isn’t there a chemical – is it thyocyanide—when added in the process somewhere, that changes the edge of the silver crystals basically making it appear slightly less grainy? Seems like I read that somewhere, but I haven’t been able to find the reference again.

I have a question about flashing, but I’ll make that a separate thread.

Here is the link to the footage: https://vimeo.com/139887229

wade sent you pm on recipe