I came across this video on the interweb; it’s an interesting overview of paper-restoration process applied to an historical periodic table from Germany. There is at least one error in the dialog; perhaps you can spot it?

There are some neat lesson-plan hooks in this video, if that’s your thing. What chemical property is the conservationist trying to adjust? What chemical(s) are used to do this? What two elements play an important role in paper restoration? Additionally, where do these elements appear on the (current) periodic table? Does that surprise you? Can you propose a chemical reaction that is happening during the restoration process?