Is it? Or is it just something that's being done as a way to mass market old posters. Do these posters have real collectable value? What sort of adhesive is being used & what type of linen? Is this "preservation technique" accepted and practiced by conservators or how would they handle it? Seems to me that in a frame shop the best (only?) conservation method would be rag board and museum hinges. If true conservation wasn't the main concern maybe artcare restore. I'm sure a framer could mount a poster to a linen with an adhesive film but I'm sure it wouldn't be easily reversable. Is the mounting of these posters on linen that we've all seen reversable? I'ld hate to try, so how could they be archival?