Labelling microfilm boxes

In response to Hilary Kaplan's query regarding durable labels for
plastic microfilm boxes and other inquiries for "permanent" pressure
sensitive labeling materials, I suggest that 3M VHB (Very High Bond)
double-faced tapes be evaluated.  These tapes have acrylic adhesives
integral to an acrylic core substrate (usually closed-cell foam).
Their #4952 is intended for bonding to powder-paint surfaces as well
as polypropylene and other plastics.  I can attest to it's
phenomenal bond to fluted plastic board products such as Cariplast.
It might be too thick (1/16") for use with bond paper label stock,
but would be ideal for use with a bristol weight.

Other tapes in this series include the general purpose (metal,
glass, plastics) #4930, 4950, and 4959; a clear version #4930; and a
low temperature version of 4930 designated as #4951.  Various widths
and thicknesses are available, depending on the type.  All of these
tapes have surprisingly high temperature tolerance of at least 200
degrees F continuous, ranging up to 400 degrees F. for intermittent
exposure.  The highest temperature type is much too thick, however,
for use on slide mounts.

These tapes are very expensive, but might be economical when
compared to the cost of labor and materials involved in re-labeling
periodically.

Geoffrey Brown
Kelsey Museum
University of Michigan

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                  Conservation DistList Instance 10:86
                  Distributed: Thursday, April 3, 1997
                       Message Id: cdl-10-86-006
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