How to store and care for works on paper

Works on paper need to be kept flat, cool, dark and dry, away from direct sunlight and damp, and in contact only with acid-free, conservation-grade materials. Paper is the most fragile thing most collectors will own, but it is also forgiving if you respect a few simple rules from the day you bring a piece home. Prints, drawings, watercolours and photographs all share the same vulnerabilities, so the same habits protect all of them.

Why is paper so vulnerable?

Paper is vulnerable because it reacts to almost everything in its surroundings. Light fades it, humidity warps and spots it, heat dries and cracks it, and the acids in cheap board or ordinary tape slowly burn brown lines into it. None of this happens overnight, which is exactly why it catches people out: a watercolour can hang happily for a year and then reveal, when you finally take it down, a sun-bleached strip where the mount once sat. The good news is that paper is stable when its environment is stable. Get the conditions right and a print will outlive you comfortably.

What conditions should you store works on paper in?

Store works on paper somewhere cool, dark and dry, with as little change as possible. A steady room temperature of around 18 to 20 degrees and a relative humidity of roughly 45 to 55 per cent is the textbook target, but the more useful instruction is simply to avoid extremes and avoid swings. That rules out the two places people most often reach for: the loft, which bakes in summer and chills in winter, and the basement or garage, which invites damp. An interior cupboard or a drawer in a lived-in room is usually far better than either. Keep paper away from radiators, exterior walls that sweat, and bathrooms or kitchens where moisture spikes.

How should you store unframed pieces?

Lay unframed pieces flat, never stacked loose, and separate each one with a sheet of acid-free tissue. A shallow drawer or an archival portfolio box is ideal; failing that, an acid-free folder kept flat on a shelf does the job. The principle is that nothing touching the work should be acidic, and nothing should press, crease or abrade the surface. Resist the temptation to roll prints. Rolling sets a curl that is hard to flatten and stresses the paper fibres, and it makes the work far more awkward to handle safely later. If a piece is genuinely too large to lie flat, roll it loosely, image-side out, around a wide acid-free tube and interleave it with tissue, then unroll it as soon as you can store it properly.

The single most common cause of damage is not disaster but neglect: paper left in a damp cupboard, or a watercolour left in the sun.

Does framing protect the work?

Good framing protects works on paper very well, and poor framing actively harms them, so it is worth getting right. The two things that matter most are the glazing and the materials behind it. Choose UV-filtering glass or acrylic to slow fading, and make sure the work is mounted on acid-free board with the image held by water-reversible hinges rather than glued or taped down. The artwork should never sit directly against the glass, because any condensation can transfer the image to the glazing or encourage mould; a window mount or spacer keeps a small air gap. A good framer will do all of this as standard if you ask for conservation framing, and many galleries that sell prints and original works on paper, such as Bircham Gallery in Holt, can point you to a framer who works to that standard.

Where should you hang it once framed?

Hang framed works out of direct sunlight and away from heat and damp, and the rest looks after itself. North-facing walls are kindest, since they never catch direct sun; a wall opposite a bright window is the worst place you can choose. Keep pieces off the wall above a working fireplace or a radiator, where heat and soot do quiet damage, and away from steamy rooms. If you love a piece enough to want it in a bright spot, rotate it: bring it out for a season and rest it in storage for a while, so no single work absorbs years of light in one go. Watercolours and photographs are especially light-sensitive and reward this kind of rotation.

What about handling and cleaning?

Handle works on paper as little as possible, by the edges, ideally with clean dry hands or cotton gloves. The oils and salts on fingertips mark paper and attract dirt over time, and a single crease or fingerprint in a margin can affect both the look and the value of a print. Never try to clean the surface of a drawing or watercolour yourself, and never use water, solvents or erasers on a finished work. If a piece is foxed, stained or cockled, take it to a qualified paper conservator rather than attempting a fix; amateur cleaning causes more irreversible damage than almost anything else.

When should you call a conservator?

Call a conservator the moment you see foxing, mould, staining, tears or buckling that is getting worse, rather than waiting for it to settle. Many problems are stable and only need better storage, but some, like active mould or acid burn from an old mount, will keep spreading until they are treated. A conservator can also advise on safe storage and re-mounting if you have inherited works in poor old frames. Treat their fee as part of the cost of owning something fragile and worth keeping. Buy well, store sensibly, and most works on paper will ask very little of you for decades.