What replaces the US Declaration of Independence when it is not on display?

Question

I know in light and air, old paper fades and falls apart, to prevent this, the pages of the special documents such as The US Declaration of Independence are turned every six months. During the restoration/preservation time, what is on a display in Washington, D.C.?

Answer 1

I am not quite sure, but it might be a replica of it. Many people come to Washington, D.C. to look at it, so when they have to preserve it, they should probably display a copy of it, so people are not disappointed that they traveled so far to see nothing...