Double sided mounts

Alexandra Greathead <alexandra.greathead [at] ashmus__ox__ac__uk>
writes

>I am about to embark on a large project of remounting works in
>double sided mounts.  The new mounts will again be double sided
>however I need to find a good "glazing" solution for the verso of
>the mounts.  I have already been sent samples of 1mm Perspex and
>175micron Melanex, neither of which is totally suitable.  Does
>anyone know of even thinner Perspex (Plexiglas) or thicker Melanex
>(Mylar)?

Alexandra Greathead wrote enquiring about suppliers of polyester
film thicker than 175 micron.  A few years ago we purchased some 250
micron thickness polyester from:

    Polyester Converters Ltd.
    Polymex House
    49-53 Glengall Road
    London SE15 6NF
    United Kingdom
    +44 207 740 9740
    Fax: +44 207 277 5654
    sales<-a t->psggroup< . >co< . >uk

I also looked at even thicker sheets but found that polyester film
becomes visibly milky at thicknesses greater than about 250 microns.
I doubt that 250 micron thickness polyester will be suitable for
this application as the polyester is still fairly floppy.  At 250
microns the polyester would probably not provide sufficient support
within a double sided mount for anything other than very small
apertures.

Nicholas Burnett
Director
Museum Conservation Services Ltd
Cambridge
England


                                  ***
                  Conservation DistList Instance 22:9
                 Distributed: Saturday, August 9, 2008
                        Message Id: cdl-22-9-004
                                  ***