“The elementary school
in which I work installed Purell dispensers everywhere, including at the door
to the library, and it's school policy to have students douse their hands
constantly. I know I can't use it when I do "white work"
(tatting and other lace-making) because it eventually browns the cotton, even
if I wait until my hands are dry, so I'm somewhat concerned about the effect of
purell on the books -- not that we have many special ones, but just curiosity
in general. Does anyone know about the archival-ness of Purell or other
"water-free" hand sanitizers?
The main ingredient is alcohol; 62% ethanol (aka “grain” alcohol), 5% 2-propanol (aka isopropyl “rubbing” alcohol). There are lots of unknown additives. These can include fragrances, aloe vera, etc. I wonder if the added aloe vera juice could be causing the discoloration of cotton. Aloe vera is one common additive and it does turn brown quickly (try squeezing the juice from the plant, if you’ve never seen it). Otherwise, I think they use some sort of cellulose ether, like methylcellulose, as a thickener. The fact is that the ingredients are proprietary, and they only have to reveal the alcohol content because it is a fire hazard. Otherwise the governement would allow them to have a completely “secret” formula.
BTW, you can look up any item’s ingredients by searching for a material safety data sheet. Just enter the name of the item and MSDS into your search engine of choice. The only catch is that they are only forced to disclose potential health, fire, or environmental hazards. The EU may have better disclosure standards, but I’m not sure what they call their disclosure forms.
The information contained in this message is intended only for the recipient, and may otherwise be privileged and confidential. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, please be aware that any dissemination or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify us by replying to the message and deleting it from your computer. This footnote also confirms that this email has been scanned for all viruses by the Hampton Universitys Center for Information Technology Enterprise Systems service.
For all your subscription questions, go to the Book_Arts-L FAQ and Archive.
See http://www.philobiblon.com for full information