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Most paper used for commercial advertising, vintage or otherwise, is cheap and disposable – often with high acidic content. One of the ways to strengthen and naturally preserve paper is to mount it to an archival acid-free surface, a process often referred to as “Linen-backing”. In fact, a misleading description since no linen is used. The term dates back to an early 20th century French process for conserving posters. Image: |
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