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Re: polyester vs. mylar question

I think many would agree that this is really somewhat of a minor issue =
unless the book is going to be left for long term storage in a =
questionable place. There is an enormous price difference between =
archival and regular clear dj covers.=20

If you keep a dj wrapped any clear protector fresh, keep the item out of =
sun and always temp controlled I don't see any trouble. Under those =
circumstances the damage is reduced to a bare minimum. There are many =
other ways to ruin a book than by using one dj cover over another. My =
main issue with the clear dj covers is protection for the dj (ie. =
rubbing, chipping or tearing.)=20

I would never use any clear plastic of any quality on an original =
lithographed cover. There you are talking about art and as such should =
not be treated as a regular offset coated dj. If you have something =
really special like a lithographed cover I wouldn't put that in a =
plastic dj cover of any sort because not knowing the type of ink used, =
that type of wrap in plastic could have serious side effects. In this =
case, I would rather see a cover made out of glassine, and the item put =
into an acid-free box.


james linza, antiquarian=20

washington, d.c., usa +1-202-478-0468
milan, italy +39-02-954-41-266

e-mail: thegentry@lycosmail.com

----- Original Message -----=20
From: Olivia Hibel <olivia@GHPLUS.INFI.NET>
Sent: Friday, June 18, 1999 4:48 AM
Subject: polyester vs. mylar question

> Recently in an art supply store I saw a photo album the label
> of which said it was of archival quality, and, that the
> windows were made of polyester.  Also, the same store sold
> rolls of what looked like a cellophane, and which was marked
> "polyester".
>         Would that polyester therefore be harmless to paper,
> and acid-free, or, does it depend on which polyester, and how
> it is made?  Could I thus use polyester to make "folders" or
> protective wrappers for book dust jackets?   Some of these
> dust jackets are from theforties and  fifties, from European
> books, and several are actually lithographs.
>          Is mylar acceptable in such cases, or, would mylar
> damage the dust jackets as  a member of this list recently
> said it
> fades or erases inkjet printing.  Is mylar acceptable for
> ordinary printed book jackets but not for those which are
> authentic lithographs? Or for both?
>          I'm really confused about all these materials, and
> would appreciate either a run=3Ddown or a reference to a site
> which explains it.
>        Thanks in advance,    Olivia

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