The words “acid-free” appear on countless framing products, but the label alone does not always tell the whole story.
Many boards and papers begin life containing lignin, a naturally occurring component found in wood pulp. As these materials age and are exposed to light and environmental conditions, they can become acidic, potentially causing yellowing or brown stains that migrate into surrounding artwork.
Some products achieve an acid-free rating through chemical treatment, while others are manufactured from naturally stable materials such as cotton fibres. Although chemically treated products may perform adequately in many situations, they are not necessarily equivalent to premium conservation-grade materials.
For valuable artwork or sentimental pieces, many framers recommend 100% cotton rag mat boards and backing boards because they are naturally free from lignin and are designed with long-term preservation in mind.
This does not mean every project requires the highest specification available. Decorative prints or temporary displays may suit more economical solutions. The important point is understanding the differences so that framing choices align with the value and intended lifespan of the artwork.
When discussing your project with a professional framer, ask not only whether a material is acid-free, but what it is made from and why it has been recommended. An informed decision today can help avoid expensive restoration work in the future.
If you're unsure which option is best for your artwork, the team at Artis Pura can help guide you through the choices.
