My brother Aaron is a Paper Science Engineer. He has degrees in Paper
Science Engineering and Chemical Engineering. I will forward your message to
him and then post any response.
-Ben Saks
On Thu, Jan 29, 2009 at 7:59 AM, Mark <f1diddler_at_yahoo.com> wrote:
>
> I do know that the old tan paper envelopes would destroy rubber, due to
> acidic leaching. I want to know (not guess) if there is any risk (over
> years) from sticking half of a 3x5 index card inside a (plasic) bag,
> contacting rubber.
>
> This quote from Wikipedia.
> <<Today, much of the commercially produced paper is acid-free,[5] but
> this is largely the result of a shift from china clay to (cheaper)
> chalk as the main filler material in the pulp: chalk reacts with acids,
> and therefore requires the pulp to be chemically neutral or alkaline.
> The sizing additives mixed into the pulp and/or applied to the surface
> of the paper must also be acid-free.>>
>
> thanks,
> Mark B
>
>
>
--
BEN SAKS
Project Designer
bsaks_at_wetdesign.com
WET
10817 Sherman Way
Sun Valley, CA 91352
T 818.769.6200
F 818.301.6111
www.wetdesign.com
Received on Thu Jan 29 2009 - 10:05:06 CET