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<p>[QUOTE=&quot;RickieB, post: 807600, member: 2486&quot;]Jim.. I am glad to see another Scientist&#039;s opinion here.</p><p>Although I do not work in a capacity of Archival Science, I do work in the pharmaceutical/biotechnology arena. </p><p>I think it would be an interesting experiment to plate samples taken from random notes and incubate them. I am quite sure all of the varieties of microbes would be primarily aerobic. For all the non Scientific types, a by product of microbial respiration is the primary production of Lactate (an acid) just like when you exercise and experience the burn...<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p>&quot;Aerobic&quot; meaning with O2 so the little critters can grow, as long as there is a carbon source as well...hum paper (fiber-cellulose) &amp; ink sound delicious to me...:eating:</p><p><br /></p><p>I am of the opinion that our paper money in circulation has to be one of the truly disgusting filthy objects we come into contact with.</p><p><br /></p><p>Last time I checked, none of the TPG Companies retains a Scientific Staff, they simply imply what they are fed. I have had the pleasure to visit and work with some of DuPonts Scientist, however, none from the polymer labs at this point. What folks need to take into consideration is what I said before, the % of O2 in ambient is ~ 20% the remaining ~80% is N2. It is not as if 100% O2 is being used. The combination of Temp and Humidity <u>may have a greater impact</u> than the influence of a gas.</p><p>What I will say with confidence is that if PCGS has open portions on the slab to let the note breathe, then it is subject to RH (Relative Humidity Shifts) % moisture in ambient air, therefore I would certainly use RH control for my storage area having this type of holder.</p><p><br /></p><p>This has given me an idea of developing a slab that can be pressurized to say ~ 0.1 to 0.2 Bar, containing N2. But then again I would be faced with proving that there is no gas permeability of the selected materials or internal membrane for that fact. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>See you around Jim</p><p><br /></p><p>Regards,</p><p><br /></p><p>RickieB[/QUOTE]</p><p><br /></p>

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