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[filmscanners] Re: What can you advise?

At 7:08 PM -0700 9/26/02, Arthur Entlich wrote:
>Austin Franklin wrote:
>>  I also have a dehumidifier in my lab...I can't say if that helps a lot or
>>  not, but I don't have any dust problems on my stored film.  On film I simply
>>  leave lying around, perhaps.
>Actually, a moderate humidity level keeps dust levels down, by reducing
>static, and by making the dust heavier and more likely to fall to the
>ground.  20-30% humidity is probably optimum in those terms, or you can
>get mold growth.  We do have a high humidity level during most of the
>year, although summers are often quite dry.  We do use a dehumidifier
>during the weeks of 100% humidity we get during the winter.

Hmmm....  I think you'll find that the humidity inside buildings is
lowest in winter in this area, and highest when the temperature
outside is close to that inside, and it's raining or foggy; and
somewhat less again in the drier summer, such as we've had. Humidity
levels inside are around 30-40% when it's cold and rainy outside in
winter, but can get up to 70% or more when there have been a number
of very warm, rainy days in spring. During dry summer weather the
humidity indoors is often around 50%. Mold has problems growin at
less than 40%, and hardly any types can survive less than 30%.

    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw@archiphoto.com
  |[ ]|     http://www.archiphoto.com

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