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  1. #1

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    Emulsion cleaner

    Hello,

    I am new here, so I hope no one will be offended if I am posting this in the wrong forum. I am a recent film convert and have been having a hard time with "gunk" stuck to me negatives. Mostly, it is finger oil and other organic soluble material. I have been looking around and found Photosol advertising and selling PEC-12 as photographic emulsion cleaner. I was wondering if 99% pure 2-Propanol (Isopropyl alcohol) would be as good as PEC-12. At 17$ for 4oz, it does seem costly unless there is some distinct added advantage.

    Thanks
    Last edited by shutterboy; 04-15-2014 at 06:51 PM. Click to view previous post history.

  2. #2

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    Thought of adding some more information that I found:

    As per http://photosolcart.com/wp-content/u...B_2014_PDF.pdf, PEC-12 contains Methanol along with Butyl acetate. Can someone tell me what is the acetate used for and how does it help in cleaning emulsions? Also, if I just use just methanol, what changes?

  3. #3
    yurisrey's Avatar
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    The best practice is to avoid contacting the negatives improperly (perfs are your friends) and to get 100% cotton gloves. Also, good old photo flo works magic. I bought a 16oz for somthing like $6 years ago and I still have plenty for years to come.
    extinction meters tend to be more accurate if you substitute your morning oj for carrot juice.

  4. #4
    Jim Taylor's Avatar
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    Steve Anchell's "The darkroom cookbook" has a 'film cleaner' recipe listed... propan-2-ol; ammonia and water (approx: 97:1:2)

    This is what I use and it works a treat - great for cleaning many other things too!!

    HTH
    Cheers,

    Jim.

  5. #5
    Athiril's Avatar
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    PEC-12 leaves behind a lot of residue. Also that residue seems to bond with many surfaces. IMHO it is a fraudulent product.

  6. #6

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    Quote Originally Posted by Athiril View Post
    PEC-12 leaves behind a lot of residue. Also that residue seems to bond with many surfaces. IMHO it is a fraudulent product.
    Oh well, what do you recommend for cleaning then?

  7. #7
    Kevin Caulfield's Avatar
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    Isopropanol.

    Sent from my C6603 using Tapatalk

  8. #8

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    Quote Originally Posted by Kevin Caulfield View Post
    Isopropanol.

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    Well, not to nitpick, but I believe you either need to call it Isopropyl Alcohol (common name) or 2-Propanol (IUPAC name) or more correctly, Propan-2-ol.

  9. #9
    Kevin Caulfield's Avatar
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    Or Isopropanol. How do I know?

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