Ing. Koblic MPB (outdated film developer)

Ing. Koblic MPB (outdated film developer)

  1. Lukas_87

    Lukas_87 Member

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    Lukas_87 submitted a new resource:

    Ing. Koblic MPB (outdated film developer) - Ing. Koblic MPB (outdated film developer)

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    Last edited by a moderator: Feb 6, 2016
  2. psvensson

    psvensson Member

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    Delta 400 looks awesome, and very sharp, in MC-TEA, which is also a low-sulfite, low-pH developer. For me, the price of low grain and high sharpness was a slight reduction in speed. Totally worth it, though.
     
  3. Lukas_87

    Lukas_87 Member

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    maybe i haven't said that loudly enough but biggest advantage of MPB is given tonality.
     
  4. Christopher Walrath

    Christopher Walrath Member

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    Interesting formula. Until you explained the presence of the Disodium Phosphate, I was at a loss as to its purpose. And another oddity that appears to me is the use of Metol with sodium sulfite in anhydrous form rather than dessicated as seems to be, by and large, customary. The anhydrous seems to be primarily used with hnydroquinone. (Ron must be rubbing off on me a little.)

    Great recipe.
    Thank you for sharing it with us.
     
  5. Athiril

    Athiril Subscriber

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    Nice images, I wonder what the best formula for most beautiful tonality would be :smile:

    Is metol substitutable with another developer?
     
  6. brianmquinn

    brianmquinn Member

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    Anhydrous is the same thing as dessicated. It it just another word for the same thing.
     
  7. Lukas_87

    Lukas_87 Member

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    should be but you have to work out the proper amounts for yourself (I just don't know, right?)...
     
  8. Igor Savchenko

    Igor Savchenko Member

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    Lukas 87: What's capacity of the developer - how many 135 flilms in one liter, please?
     
  9. Lukas_87

    Lukas_87 Member

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    one liter of working solution is capable of developing four 135-36 films
    it is important to note that used solution can not be stored - you have to develop all four films quickly one after another.
    also - increase developing time by 10 % for each developed film.

    however I have no experiences with reusing MPB - I make 3x stronger mix and then use it "one shot".
     
  10. Lukas_87

    Lukas_87 Member

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    hell, this developer is for "expired film", it's not outdated... don't know where I had my brain when I wrote that :D
     
  11. MPandolfo

    MPandolfo Member

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    possibly you smoked some of Daniel's plants ? :smile:
     
    Last edited by a moderator: Jan 6, 2010
  12. haryanto

    haryanto Member

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    in my country Indonesia, it's hard to find Disodium phosphate, can change it to trisodium posphate?

    thanks
    haryanto
     
    Last edited by a moderator: Apr 15, 2010
  13. Lukas_87

    Lukas_87 Member

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    as far as I know, 1 % solution of TSP has pH of 12,1.
    compared to pH around 9 of 1 % solution of disodium phosphate (smewhere it's said it is neutral).
    maybe it can be substitued, but then you have to adjust the pH by adding some acid. i'm not a chemist, sorry.
     
  14. pentaxpete

    pentaxpete Subscriber

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    Hallo- I just JOINED this Venerable Site ! I love mixing my own ever since 1951 when the School Chemistry Master showed members of the School Photo-Soc how to mix up developers ! I tried this Formula today with some 1992 dated Kodak TMY 400 I downrated to 250ASA -- I mixed a x3 concentration, then I diluted it 1+3 with water -- was my maths corect as the test length of 120 film was severely under-developed at 10 minutes (guessed time) and I was careful to use 18oC not the usual 20oC. Regards to all the Experts on here, from Darkest Essex, England -- Peter.
     
  15. fotch

    fotch Member

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    Hello pentaxpete and welcome to APUG.
     
  16. pentaxpete

    pentaxpete Subscriber

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    I did the other half of the cut 120 film-- this time I rated the film at 200ASA and gave it 17 minutes instead of 10 minutes -- result -- better, but still a bit 'thin' and I think it needs at least 18 minutes dev time and rate at 160 ASA.
     
  17. Lukas_87

    Lukas_87 Member

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    hello, for 3x concetrate you should make up the working solution by diluting it 1+2 with water (1+2 dilution = 1:3 = 1/3 concentration). however, don't be afraid to prolong the development further, this developer is softly working. maybe you will have to add more Disodium phosphate to it for 18 years old film (10-20 g maybe, maybe more).
    good luck.
     
  18. pentaxpete

    pentaxpete Subscriber

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    Dear Mr Lucas : many thanks -- your MATHS is much better than mine ! I asked my boy and HE said it should be 1+2 not 1+3 as I worked out -- I am experimenting more with the developer, will try with some other films -- the FOG level on my outdated TMY 400 was very low , so looking promising ! ( just one worry -- MY bottle says 'Disodium Hydrogen Phosphate' -- is it the same as the ordinary 'Disodium Phosphate' ? )
     
    Last edited by a moderator: Sep 26, 2010
  19. Lukas_87

    Lukas_87 Member

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    I think it should be all right as long as your Disodium Hydrogen Phosphate is Na2HPO4 . 12H2O (CAS: 10039-32-4). It's the same I think (or hope).

    Best Regards from the Czech Republic!
     
  20. wootsk

    wootsk Member

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    I have nothing to say except thank you to the contributer.