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Re: the death of pyroxylin coated book cloths (fwd)

Pyroxylin is nitrocellulose.  As it degrades and ages it becomes
increasingly flammable.  This was the base for old movie film before the
invention of cellulose acetate(s) (i.e. "safety film").  It has also been
used as a binder for pigments.

I suspect that cheaper, easier to get plastics/polymers as coatings are
replacing this material.  It may be an economic issue for the
manufacturer of the cloth.  Pyroxylin may be regulated by the US federal
government (e.g. OSHA, NIOSH) although this entire paragraph is
speculation on my part.

Stephanie Watkins

On Wed, 9 Oct 1996, Terry Collins wrote:

> Good day to all.  I am forwarding this question to Book Arts-L for
> discussion, as it was forwarded to me from Stumpers-L.
> ------------------------------------------------------------------------------
> Terrence Collins                        email: collins@xxxxxxxxxxxxxxxxx
> Library Associate-Periodicals           phone: 910-917-5423
> Gramley Library, Salem College          f a x: 910-917-5339
> Winston-Salem, NC  27108                Tell the truth and run.
> ------------------------------------------------------------------------------
> ---------- Forwarded message ----------
> Date: Thu, 03 Oct 1996 21:44:48 -0500 (CDT)
> From: Sammie Morris <sammie@xxxxxxxxxxxxxxxxxxxxx>
> To: stumpers-l@xxxxxxxxxxxx
> Subject: the death of pyroxylin coated book cloths
> I have a friend who needs information on why pyroxylin is no longer used
> for coating book cloths. (She knows it is now considered BAD, but doesn't
> know WHY.) Does anyone have helpful sources, web sites, or general
> information on this subject? Any input would be appreciated.
> Sammie Morris
> sammie@xxxxxxxxxxxxxxxxxxxxx
> Graduate School of Library & Information Science at UT

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