In the 1970's I attended a workshop conducted
by the archivists of the Wisconsin State Historical Society. The
workshop was about preserving documents, and I have not forgotten any of
the basics, and use these methods even today.
Steps for Preserving Documents:
The basic premise for preservation of any clipping or photo is simple.
Air and light do damage. Keep the documents enclosed, preferably
in sealed archival quality page protectors, then keep in a box (archival
quality storage box).
Scrapbooks should have tissue paper placed between pages, to avoid transfer of ink.
(your local librarian should have catalogs on archival supply materials)
DO NOT LAMINATE!!! The glue will eventually start to eat
away at the document.
Newspapers (but not photos!) must be deacidified, before you enclose
them in plastic.
[note - newspaper ink needs one full year to dry, so do not seal
clippings from the past 365 days]
Enclose in an archival quality page protector (if using regular
page protectors, purchase those with greatest thickness of plastic.)
Label on the outside of the page protector.
Store collection in a box, away from the light.