Re: Glassine Envelopes

Thanks, I didn't know glassine was extremely hygroscopic. It sounds
like they shouldn't be using the term "archival" when selling 4x5
glassine. I'd stick with a mini sandwitch or maybe cookies for them.

Ryuji

From: Gawain Weaver <gawain.weaver@gmail.com>
Subject: RE: Glassine Envelopes
Date: Mon, 13 Feb 2006 12:29:31 -0500

> Glassine has varied a lot over the years, along with its method of
> manufacture. It has to be made translucent, either by the addition of
> chemicals and or simply by pulverizing the fibers until they are very very
> short. Either method makes the glassine extremely hygroscopic (and thus
> translucent due to high moisture content), which is a problem in itself when
> used as a storage material in direct contact with photographs. Also, some
> find that it sticks very easily to negatives materials and that the fibers
> are difficult to remove. It has been known to darken/yellow and become
> brittle upon aging. The ISO enclosures standard makes a recommendation
> against its use for photographic enclosures in a list of materials that are
> "chemically or physically unstable".
>
> Gawain Weaver
>
> -----Original Message-----
> From: Ryuji Suzuki [mailto:rs@silvergrain.org]
> Sent: Monday, February 13, 2006 12:53 AM
> To: alt-photo list
> Subject: Re: Glassine Envelopes
>
> On Sun, 12 Feb 2006 18:39:59 -0500, "etienne garbaux"
> <photographeur@nerdshack.com> said:
>
> > Just be aware that glassine envelopes are a far cry from archival by
> > today's standards. Conservators have advised against them for at least
> > 30
> > years now.
>
> What's the basis for this? In my understanding, "archival" glassine
> envelopes sold for photographic use these days are lignin- and
> acid-free, like other archival paper envelopes. However, I didn't
> confirm this with a glassine manufacturer. Did you?
>
Received on Mon Feb 13 13:07:59 2006