Nefarious wrote:Thanks, Mo. My U.S. poster (seen in the second post on page one of this thread) was pristine when I bought it at a shop in Hollywood California, back in 1970. When I put it on display behind a plexiglass frame however, it yellowed in a few years. Is there any way of removing the yellowing without damaging the poster?
Nef a couple of things will make the poster yellow. The most common is direct sunlight or floresent lighting. Another common reason is whatever is the backing of the poster. If it is framed and the backing of the frame which touches the print is not an acid free board it will over time destroy the poster or print by turning it yellow then brown. Back in the 70's they usually framed with cardboard on the back and the acid breaks out from the cardboard and destroys the poster. I know of no way you can undo the damage already there, but you might want to see what is touching the back of the poster and if it is not acid free, get it corrected.