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  1. #1

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    White spots all over the image:- c41 Unicolor home

    Hi,
    Recently I decided to try c41 processing at home. So, I purchased Nova film processor and got 3 packs of 1L Unicolor chemistry from www.freestylephoto.biz. Till now I have developed 9 films and all of them have same problem - the scanned image from the negative is having lots of white spots. I have attached one of the photos in case if you would like to see the problem. I live in southern Ontario where the water is hard. After having this problem, I decided to use distilled water for all the steps (including the chemicals + wash + final rinse etc) - but no luck. I have also tried Kodak photo-flo at the last stage of the development but did not see any improvement. I dry my film in the suit cover. Any help on this will be appreciated.

    Thanks in advance!
    Sujoy.
    Last edited by raysujoy; 06-01-2010 at 07:51 PM. Click to view previous post history.

  2. #2
    tiberiustibz's Avatar
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    mix your final rinse with distilled water. I believe you add 9 mL of Kodak final rinse concentrate to the liter of distilled water. That way there's no gunk to precipitate on your film. Do not final rinse with only photoflo. You must include formaldehyde or another germ killer.
    --Nicholas Andre

  3. #3

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    Thanks for your reply.
    I use photoflo in the ratio 200:1 (as per instruction) but did not use formaldehyde so far. I will try this one too will let you know the result.

    Regards,
    Sujoy

  4. #4

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    I googled but I can't find formaldehyde here in Ontario. I am still searching... Meanwhile please let me know how much formaldehyde I need to use.

    Regards,
    Sujoy.

  5. #5
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    eBay search for formaldehyde you should find some, its inexpensive for 500ml 30-40%

    It wont prevent white spots, it's for preserving dye.

    To prevent white spots, you need to use distilled water for your final rinse as said above, the white spots is calcium or other minerals in your water drying on the film when it evaporates with no where to go.

    You can re-use your final rinse water though.

    1+1+200 is what I normally recommend (5ml photoflo, 5ml 40% formaldehyde, 1 litre of water) divide down to your usage, iirc I've seen PE give an amount doubling in the formalehyde, 1+2+200 (5ml photoflo, 10ml 40% formalehyde, 1 litre water).

  6. #6

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    I have used distilled water for all the steps including final rinse. The photo that I have attached has been processed with distilled water in every step (meaning that the chemicals were made using distilled water, the rinse was with distilled water etc). I have to try using formaldehyde but again as you mentioned, it won't prevent the white spots. Then where is the problem? Is the Unicolor chemistry that I got is faulty?

  7. #7
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    You have to dry the film in a dustless place and avoid dust in every step. You should also use a dust blower to blow away the dust when you scan or print your negs.

  8. #8

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    I also used that Unicolor kit from Freestyle and when I mixed the stabilizer I noticed a stringy emulsion-like substance floating around. I filtered the stabilizer through a coffee filter to get the junk out.

    It looks like your scan has some 'squiggly' artifacts that could be that stringy stuff or it could be from creases in the film from imprecise loading.

    Have you inspected the film surface closely to see if there are substances on there? Dust or other specks?

    Quote Originally Posted by raysujoy View Post
    Hi,
    Recently I decided to try c41 processing at home. So, I purchased Nova film processor and got 3 packs of 1L Unicolor chemistry from www.freestylephoto.biz. Till now I have developed 9 films and all of them have same problem - the scanned image from the negative is having lots of white spots. I have attached one of the photos in case if you would like to see the problem.

    I live in southern Ontario where the water is hard. After having this problem, I decided to use distilled water for all the steps (including the chemicals + wash + final rinse etc) - but no luck. I have also tried Kodak photo-flo at the last stage of the development but did not see any improvement.

    I dry my film in the suit cover. Any help on this will be appreciated.

    Thanks in advance!
    Sujoy.

  9. #9
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    Try out a small 250ml kit with Rollei Digibase C41 from Freestyle. ill bet for 99% sure that the white spots are gone. I have seen such spots in Minilabs running VERY hard chemistry from Kodak and Fuji. Hard chemistry beacuase the low trough put of film in their area.

  10. #10

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    Thanks for all your suggestions and help !!!

    Last week I called up Photo System Inc (the company that makes Unicolor kit) to seek help on the issue that I am facing and spoke with Alan. He is very knowledgeable and thought it could be one of following problems:-

    1.Faulty agitation technique causing pinholes.
    2.Residual photo flo drying on the negative.

    I think for my case 2) was the problem. I tried to clean the faulty negatives using dishwasher liquid( I read somewhere that it helps to clean tiny unseen spots in the negative) with sponge and found dramatic improvement.

    Yesterday I developed another film and made sure that residual photo flo has been removed properly. I have to say result was impressing but not 100% perfect (meaning still had 1 or 2 minor marks). Afterwards I cleaned the negative with dishwasher liquid – the result was 100% perfect!!!

    Please find the attached images.

    According to Alan, the equivalent of formaldehyde is already present (no need of this step) in the stabilizer and also formaldehyde is a toxic substance to use.

    Anyway, it seems my problem is solved and I have to say that I am very happy the way Alan and you all came forward to help me – thanks a lot!

    Regards,
    Sujoy.
    Attached Thumbnails Attached Thumbnails bud.jpg   bridge.jpg  

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