Another thought would be to balance appropriate rotation of objects against the numbers Dave suggested. How many items have been over-exposed or otherwise damaged? What resources do you have to rotate objects that need to be rotated? What staff & staff time do you have to devote to collections and how does that compare to what you need? ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).