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Subject: IPI storage guide for acetate film

IPI storage guide for acetate film

From: Doug Nishimura <dwnpph>
Date: Friday, March 12, 1993
Announcing the IPI Storage Guide for Acetate Film

At last it is possible to show administrators the benefits of improved
storage conditions in dollars and cents.

"How long will the collection last at present storage conditions?"

"What would happen if we reduced the temperature five degrees?"

"If we lowered the temperature ten degrees, but raised the relative
humidity 10% would that be better?  How much better?"

Quickly and easily evaluate the life expectancy of a film collection in
a particular storage environment with the four-part IPI Storage GUide
for Acetate Film.  The Guide can also be used to determine which of
several existing environments is better for film storage, or to consider
which combinations of temperature and RH would yield the desired life
expectancy for and acetate film collection.   These figures are based on
accelerated aging data regarding the "vinegar syndrome".

The Guide does not predict the lifespan of individual pieces of film or
of specific collections of film.  The Guide's real value lies in
enabling those responsible for the care of film collections to gain a
general understanding of how temperature and humidity affect the rate of
film base degradation. These predictions are like the expiration date on
milk.  You don't expect to sit up until midnight on the expiration date
and watch the milk turn to cheese.

The Guide contains four tools:

    The Graph:  A general overview of film life expectancy across a wide
    range of temperatures and RH's.

    The "Time Out of Storage" Table:  Shows the impact of removing film
    from a special storage environment (i.e., a vault) and using it for
    varying periods of time at room temperature.

    The Wheel:  Side One contains the same data as the Graph arranged
    for quick estimate of film life expectancy at specific temperature
    and humidity conditions.  Handy for exploring "what if" scenarios or
    for comparing one storage area with another.  Side Two provides
    similar information for partially degraded acetate film.

    PLUS, "How to Use the IPI Acetate Film Storage Guide."

The cost of making the improvements to the storage area can be amortized
over the gain in expected life and compared to the value of the
collection. Other factors such as duplication costs for the entire
collection may also be added.  In this way, the real cost per year (or
per real of film per year) can be calculated for upgrading storage

To order: call 716-475-5199, 8:30 - 4:30 EST, Monday-Friday, or FAX your
order to 716-475-7230.

Proceeds benefit film preservation research.

No COD or credit card orders accepted.  Sales tax will be added to
invoices as required except where we are furnished with an appropriate
exemption certificate or registration number with order.  Shipping and
handling charges will be added to invoice.  Standard payment terms are
net 30 days from date of invoice.  Prices are subject to change without

-Douglas Nishimura
Image Permanence Institute
Rochester Institute of Technology
Frank E Gannett Memorial Building
PO Box 9887
Rochester, NY  14623-0887

                  Conservation DistList Instance 6:50
                 Distributed: Saturday, March 13, 1993
                        Message Id: cdl-6-50-005
Received on Friday, 12 March, 1993

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