This is from a serious stamp-collector friend who has 40 years of collection experience: I would advise using Showgard or Scott stamp mounts, which come in many different sizes for use with anything from a tiny stamp to a big sheet of stamps. They are available from most stamp dealers, or can be ordered from specialized dealers in stamp collecting accessories who advertise in Linns Stamp News. (Measurements will be given in millimeters.) They are composed of an unbroken front sheet of transparent mylar (usually non-reflective), backed by a piece of mylar the same size that has been cut down the middle. The backing is either transparent or black (black normally looks better). One places the stamp, sheet or cover in the mount by separating the two pieces of backing a little, and then fastens the mount in place by moistening the top piece of backing and placing it just where it goes. Both the top and bottom piece of backing are coated on the back with an adhesive similar to the traditional adhesive on postage stamps, but easier to remove when that is needed. If the material has any value, avoid stamp hinges. I use stamp hinges myself on cheap cancelled stamps in an album, but for mint stamps, sheets, etc., I use the mounts because they do not cause any damage. Also, stamp hinges will not take any weight, and anything fastened on with a stamp hinge will curl unless it is kept between the pages of an album or other book. There are some other transparent stamp mounts on the market that are composed of the wrong materials, and will damage stamps if they are in them long enough. Showgard and Scott are both entirely safe, good for centuries. ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ museum-l.html. 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).