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Acid-free mountboard
Guide ยท Updated June 2026

Conservation framing explained

Conservation framing is a way of framing artwork using acid-free, reversible materials and UV-filtering glass so the piece is protected from fading, acid burn and moisture over the long term. It's the right choice for anything valuable or irreplaceable.

Why ordinary framing can damage artwork

Standard mountboard and backing are made from wood pulp, which is acidic. Over years, that acid migrates into the artwork and leaves a brown line or stain — you'll have seen it as the tan 'mount burn' around old prints. Cheap tape and direct contact with glass cause their own problems: paper sticks to glass in damp conditions, and ordinary tape yellows and tears the work when it's removed.

None of this shows up on the day the picture is framed. It appears slowly, and by the time it's visible the damage is usually permanent.

What makes framing ‘conservation’

Conservation framing addresses each of those risks deliberately. In practice it means several things working together:

The four things that matter most

Acid-free, lignin-free mountboard and backing. Often called museum or cotton-rag board, this won't release acid into the artwork.

Reversible hinging. The artwork is held with archival tapes or corners that can be removed later without damage. Nothing is glued down.

UV-filtering glazing. Most fading is caused by ultraviolet light. UV glass or acrylic filters the majority of it, slowing fading considerably.

A gap between artwork and glazing. The mount (or a spacer) keeps the surface of the work off the glass, so it can't stick or trap condensation.

When is it worth it?

Not every poster needs museum treatment. Conservation framing earns its place when the piece is hard or impossible to replace: original paintings and drawings, signed or limited-edition prints, old photographs and documents, certificates, and anything with sentimental value you intend to keep for decades.

If you're not sure, bring it in. We'll tell you honestly whether full conservation framing is worth it for your piece or whether a simpler approach is fine.

Bring your piece in. Every job is different. Call in at 121 Victoria Road, Ferndown, or ring 01202 890690 — advice and quotes are free.

Frequently asked

Does UV glass stop fading completely?

No. It filters most ultraviolet light and slows fading significantly, but no glazing stops it entirely. Keeping the picture out of direct sunlight still matters.

Can you re-frame a picture that already has mount burn?

We can re-mount it in acid-free materials to stop further damage. Existing staining can't be reversed by framing, but a conservator may be able to help with valuable pieces.

Is conservation framing much more expensive?

It costs more than standard materials, but usually a modest amount relative to the value of what it's protecting. We'll give you a firm price when you bring the piece in.

See our framing services