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Thread: Disinfecting developed film from lab due to Coronavirus

  1. #1
    Alan Klein's Avatar
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    Disinfecting developed film from lab due to Coronavirus

    How would you handle negatives, contact sheets, glassines the film is shipped in, all received back from a lab who developed your negatives? It's easy to spray things with 91% isopropyl alcohol. But just which objects should be sprayed? Which could be damaged?

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    jp's Avatar
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    Re: Disinfecting developed film from lab due to Coronavirus

    Just let them sit for a few days. Corona doesn't last that long without a host.

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    Re: Disinfecting developed film from lab due to Coronavirus

    Dilute your alcohol a little down to 80% or a little lower -- it will be more effective.
    "Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China

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    Re: Disinfecting developed film from lab due to Coronavirus

    Quote Originally Posted by jp View Post
    Just let them sit for a few days. Corona doesn't last that long without a host.
    This, if you're really worried about it. 72 hours will definitely do the job. The same applies to packages received, etc. Discard the packaging, set the contents aside and then wash your hands well. Let things sit for 72 hours.

    Doremus

    P.S: FWIW, hand sanitizer, etc. are all about 60% alcohol.

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    Re: Disinfecting developed film from lab due to Coronavirus

    I think the best method might be to put the films out in the sun, or under a UV light, for a few hours.
    ... JMOwens (Mt. Pleasant, Wisc. USA)

    "If people only knew how hard I work to gain my mastery, it wouldn't seem so wonderful at all." ...Michelangelo

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    Re: Disinfecting developed film from lab due to Coronavirus

    Quote Originally Posted by JMO View Post
    I think the best method might be to put the films out in the sun, or under a UV light, for a few hours.
    Two birds with one stone. Alan's transparencies disinfected and subjected to an accelerated light fading test at the same time.

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    Re: Disinfecting developed film from lab due to Coronavirus

    Quote Originally Posted by jp View Post
    Just let them sit for a few days. Corona doesn't last that long without a host.
    +1

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    Alan Klein's Avatar
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    Re: Disinfecting developed film from lab due to Coronavirus

    Quote Originally Posted by Vaughn View Post
    Dilute your alcohol a little down to 80% or a little lower -- it will be more effective.
    Why is that?

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    Re: Disinfecting developed film from lab due to Coronavirus

    More effective -- the water allows the alcohol to do more damage. It is a science thing. I have forgotten the mechanism.

    Whisky won't work -- not strong enough (internal use only), and anything over 80% is too strong.
    "Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China

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    Re: Disinfecting developed film from lab due to Coronavirus

    Quote Originally Posted by Vaughn View Post
    More effective -- the water allows the alcohol to do more damage. It is a science thing. I have forgotten the mechanism.

    Whisky won't work -- not strong enough (internal use only), and anything over 80% is too strong.
    According to the answer i got to this question, The water gets into the envelop surrounding the virus making it vulnerable to the alcohol. I use my UV sources to disinfect everything

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