Melissa,

Plastics are very problematic materials for conservators because they
not only are inherently unstable and become embrittled and deteriorate
given time, temperature, humidity, and light exposure, but also
because almost all solvents in our conservation arsenels can cause
irreversible damage.

If there is a way to place it back and support it in place on an
ethafoam pad or a clip, for example, I would suggest that. If there is
no other way of getting it back in place, then avoid things like
scotch tape or most adhesives, except for those that are water-based,
such as a PVA (white glue). Use the minimal amount (a few small dots
in the center of the body of the break - you want to avoid squeeze out
if possible). Even then that is a choice of last resort - so try all
non-adhesive possiblities first.

Cheers!
Dave

David Harvey
Conservator
Los Angeles, CA

On 12/7/07, Melissa Jolley <[log in to unmask]> wrote:
>
>
>
>
>
> Our collection includes a 1960's typewriter that has hard plastic keys. This
> piece has been on display for about two years until recently when it was
> removed to make room for a new exhibit. Upon removal I noticed the space key
> was broken and missing about 1" from the right side. I do have the piece
> that was broken off. Does anyone have a suggestion of how I should reattach
> it? Is there any kind of acceptable glue for plastic or should I just leave
> it alone?
>
>
>
> Thanks,
>
>
>
> Melissa Jolley
>
> Curator, Redcliffe Plantation State Historic Site
>
> [log in to unmask]
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