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  1. #1
    Ian Grant's Avatar
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    Filmotec/Orwo B&W Reversal processing

    First Developer ORWO 829
    Solution 1:
    Water (35°C) 750.0 ml
    Sodium sulphite 25.0 g
    Phenidone 0.2 g
    Hydroquinone 10.0 g
    Sodium carbonate 20.0 g
    Potassium bromide 6.0 g
    Potassium thiocyanate 6.0 g
    Solution 2:
    Water (20°C) 125.0 ml
    Sodium hydroxide 5.0 g
    After cooling down solution 1 pour
    solution 2 into it and

    Make up with water to 1 litre


    Bleaching bath ORWO 833
    Water 750.0 ml
    Potassium dichromate 10.0 g
    Sulphuric acid. conc. (caution) 15.0 ml
    Water to 1 litre


    Clearing bath ORWO 835
    Water 750.0 ml
    Sodium sulphite 90.0 g
    Water to 1 litre


    Second Developer ORWO 842
    Solution 1:
    Water (35°C) 750.0 ml
    Sodium sulphite 25.0 g
    Phenidone 0.2 g
    Hydroquinone 10.0 g
    Sodium carbonate 20.0 g
    Potassium bromide 6.0 g
    Solution 2
    Water (20°C) 125.0 ml
    Sodium hydroxide 5.0 g
    After cooling down solution 1 pour
    solution 2 into it and
    Make up with water to 1 litre


    Fixing bath ORWO 300

    Water 750.0 ml
    Sodium thiosulphate 5 hydrate 200.0 g
    Potassium Metabisulphite 20.0 g
    Water to 1.0 litre

    __________________________________________________ __________________________________
    Processing at 20°C:
    Times Minutes:Seconds

    1 First development (ORWO 829) 5:15 mins 20° ± ½°
    2 Washing -running ater 2 mins
    3 Bleaching (ORWO 833) 2 mins
    4 Washing - running water 1 min
    5 Clearing (ORWO 835) 1:30 mins
    6 Washing - running water 1 min
    7 Second exposure approx. 8.000 lxs
    8 Second development (ORWO 842) 2:40 mins 20° ± ½°
    9 Washing - running water 30 seconds
    10 Fixing (ORWO 303) 1:30 mins
    11 Washing - running water 3 minutes


    This process is designed for the Commercial Reversal processing of Filmotec Movie film. But should work well with any modern B&W film. You will need to experiment with the first development time and EI to find the best combination for your purposes.

    The First Developer & 2nd Developer are identical except for the Potassium Thiocyanate in the first.

  2. #31

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    Quote Originally Posted by Ian Grant View Post
    Not sure which bleach you mean, Scala or Tetenal ?

    Agfa's research was into alternatives to Permanganate & Dichromate, and it was ongoing for quite a number of years and culminated in the change from Dichromate around 2000.

    I'll hopefully test the bleaches in the Spring, I still have a lot of reading to do and then need to analysi all the potential avenues to pursue. So far I have already made some important steps into gaining full control of the B&W reversal process.

    I'll keep you posted, I won't be keeping things secret.

    Ian
    I think Tetenal.

  3. #32
    Ian Grant's Avatar
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    Quote Originally Posted by Alessandro Serrao View Post
    I think Tetenal.
    That's quite possible, I've not seen the Tetenal kits for quite a while now.

    Ian

  4. #33

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    It's a good recipe, I used it with Foma 100 negative filmt (!)to make black and white slides. First developing time 5:50 min at 20 °C . Joe From Hungary

  5. #34

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    See http://www.filmotec.de/English_Site/...VV-4185e_3.pdf for the official information, including a replenisher formula.

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