Deciding between Ultrafine Xtreme 400 or Arista EDU Ultra 200

[kb244]

I just remembered a couple days back Freestyle actually responded to me in regards to the technical paper rating HC-110 as "NR" (Assuming not recommended), and that staff referred me to the massive dev chart for times (wasn't expecting that response).

One curiosities is that for EDU Ultra 200, it has 3.5 minutes at 68F for HC-110 Dilution B. Wonder why so much shorter than 100 and 400.

I'm thinking bout taking up the advice of just grabbing a roll of whatever I'm considering before biting on the bulk.

 

[Freakscene]

One curiosities is that for EDU Ultra 200, it has 3.5 minutes at 68F for HC-110 Dilution B. Wonder why so much shorter than 100 and 400.

Foma 200 has a lot more incorporated developers in the emulsion than the 100 and 400 speed films, so it develops faster. 3.5 min, however, is too short, so maybe try dilution H (1:63 from concentrate) and use 7 min as a starting time. I found HC110 worked fairly well for Foma 200.

Marty

 

[ChrisPlatt]

Foma 200 has a lot more incorporated developers in the emulsion than the 100 and 400 speed films, so it develops faster.

Is that true? Some RC papers feature incorporated developers.
I was unaware this technology had been applied to 35mm film.
If so, what other films also feature incorporated developer?

Chris

 

[kb244]

I went ahead and ordered a bulk roll of Arista EDU Ultra 200, and a 36ct roll of both Kentmere 100 and 400. Did the order from B&H, so they'll likely be here by wednesday, hopefully before I have to head to campus at 3.

I also suggested Kentmere to the photo department for next fall/winter semester's PO126 film/paper suggestion since it would be coming from the same manufacture as what they already suggest to students (FP4+, HP5+, Ilford Multigrade RC glossy paper // I'm a student employee there, but most of my tasks to date has been assisting the visual arts department, researching equipment that we need, photographing the student's artwork for upcoming accreditation, keeping the digital lab printers working/clean, and photographing events as needed). I understand that Kentmere 100/400 are not the same emulsion as FP4+/HP5+, they seem to share the same dev time for the sprint chemistry (bout 1.5 min longer for Kentmere 400 vs HP5+ but identical for FP4+ vs Kentmere 100). And from the reviews they seem like it would be more suited for a student-affordable, yet modern looking film. Also the reports that K400 dries flatter than FP4+/HP5+ seems like something that would be more desirable among my classmates who are using the ilford branded films currently.

I went with the AEU 200 for myself in bulk because I feel like I'm going to want the "character" it brings, but if I like the K400 in comparison to say Tri-X, I'll consider either bulk, or more rolls of that a couple payrolls from now. (and with any luck I'll still be able to access the darkroom in the back over the summer when I'm working there over summer classes). At worse with the AEU200 I'll just need to filter (red, orange, yellow, etc) the lens outdoors from what I been seeing online.

I'll probably shoot one of the two rolls I have of Foma's Retropan 320 until that order arrives, might mix up a stock batch if Microphen for that since we got some spare boxes in the back since the massive dev chart shows 10-11 minutes for that, but least Retropan 320 has a somewhat 'normal' dev time for HC-110 Dilution B at 7 to 8 minutes, I'm just curious to see how a fine-grain developer like Microphen would do with it, and I need to mix some up anyways to test results with the expired P3200 rolls I have.

 

[Freakscene]

Is that true? Some RC papers feature incorporated developers.
I was unaware this technology had been applied to 35mm film.
If so, what other films also feature incorporated developer?

All"modern" flat and epitaxial and monosize cubic grain films use a lot of incorporated development accelerants, and most older technology films with mixed cubic grains use at least some. Plain silver halides aren't very fast, and develop slowly. Film emulsions are reasonably complex.

Marty

 

[ChrisPlatt]

All"modern" flat and epitaxial and monosize cubic grain films use a lot of incorporated development accelerants, and most older technology films with mixed cubic grains use at least some.

Interesting. Does this at least partially account for tabular grain films exhausting fixer faster than conventional?

Chris

 

[Freakscene]

Interesting. Does this at least partially account for tabular grain films exhausting fixer faster than conventional?

No - most of these products are organic and most of them, once activated, stay in the developed film. Unactivated product just gets washed out. The reaction dynamics of flat silver grains are different to cubic grains, and in general they exhaust fixer faster. Epitaxial grains have reaction dynamics in between cubic and flat gains. These are generalisations, it all depends on individual chemical composition.

Marty

 

[ChrisPlatt]

What is the long term impact on negative image permanence by these "incorporated development accelerants"?

In other words are modern non-cubic grain films therefore considered less archival?

Chris

 

[DKimg]

If you can find bulk roll of Kodak Double-X 5222, that can be an option too to feed that Tri-X. Other than that, Arista EDU 100 & 200 are good film. I've only bought expired film from other photographers but so far never had any bad experience