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Author
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Topic: Linen backing your posters
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Mitchell Dvoskin
Phenomenal Film Handler
Posts: 1869
From: West Milford, NJ, USA
Registered: Jan 2001
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posted 12-22-2004 12:03 PM
The short answer is yes, linen backing is mounting the poster on linen cloth. Almost all paper manufactured since 1900 has a high acid content, a by-product of the way it's manufactured. Most inks will fade over time, faster when exposed to direct sunlight. These factors, along pollutants in the air, cause posters to self destruct over time. It may take 30 to 50 years, but it will happen to most posters. The paper will slowly yellow, slightly shrink, and become very brittle. The good news is that posters can be restored to like new condition though various chemical baths, that remove the acid and whiten the paper without damaging the printing.
The most common way posters are mounted in the USA for framing is on solid foam board. The problem with this, from an archival perspective, is that the foam board (and the glue) has a high acid content, it is rigid not allowing the poster to shrink and causing potential bubbles or cracking years down the road, and seals off the back side of the poster. This means that not only does it not stop the degradation of the poster, it also makes it very difficult to restore the poster in the future. Linen backing is the most popular form of archival mounting. Some other include mounting on rice paper and non-acidic construction paper. The common thread to all of these is that they are non rigid so that the poster can breath, non acidic so they do not hasten the posters disintergration, and can be bathed in the restoring chemicals so that the poster can be restored in the future. While regular foam board mounting from your local frame shop may be fine for most posters, anything that you want to last lifetime or is of great value should be on linen (or another archival) backing. Mounting a poster on foam board destroys it's value to serious collectors. They want archival or not mounted at all.
/Mitchell
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