Arista Ultra / Foma 200 / EI / Development

Discussion in 'Large Format' started by wmwhee, Aug 18, 2013.

  1. Just passing along my experience with Arista Ultra 200 8x10 film with regard to exposure index and development time. This weekend
    I exposed two sheets. Bright overcast. I rated the film at iso 125, which produced good shadow detail. I developed one sheet in d76
    (stock) at 68 degrees in a rotary processor five minutes, a 15% reduction of recommended 5-6 minute development time for the
    rotary processor. Too much contrast (pale jeans showed little, if any, detail). Then I developed the second sheet, exposed identically
    to the first sheet, in d76 (1+1) at 68 degrees in a rotary processor for 5-1/2 minutes, a 30% reduction of recommended 8-9
    development time, 15% for continuous agitation in rotary processor and an additional 15% for reduction in contrast. This negative
    looks good to me, with good shadow detail and good highlight detail.
     
  2. My experience parallels yours. I've used about 400 sheets of 8x10 Fomapan 200 (aka Arista Edu Ultra 200) at EI = 100 and a 25% reduction in Xtol development time. For general landscape work the negatives are predictable, easy to work with, without emulsion flaws, and I can't complain about the price either.
     
  3. Wow! 400 sheets. A friend game me a half dozen sheets (I have been using paper negatives almost exclusively). This past
    weekend I exposed both film negatives (Arista 200) and paper negatives, same subject, same conditions, and I made contact prints
    from both film and paper negatives. What a difference! This weekend the film won hands-down. Before ordering 810 film, Arista or
    Ilford, I want to shoot the remaining sheets of Arista film in various conditions. Does your 25% reduction in development time include
    compensation for continuous agitation, or does it include only compensation for reduction in contrast, if that makes any sense to you?
    Thanks for your contribution.
     
  4. My standard time for Arista Edu Ultra 200 and 400 in the 8x10 format in Xtol (replenisher system) is 8min 30 seconds at 20 Celcius. I develop one sheet at a time in a tray with continuous gentle agitation. The time includes an allowance for an initial pre-soak to wash out most of the anti-halation dye. Rotary agitation is more vigorous than a hand powered tray so I'm not surprised your times are a bit quicker. The continually replenished Xtol I use is 7 years "old" and its activity is very consistent but slower than freshly mixed Xtol. That's allowed for too.
     

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