Caring for works on paper is one of the most important responsibilities a collector can take on. Miniatures, calligraphy, manuscript leaves and prints are made of organic materials that respond to their environment. With sensible precautions, most damage can be prevented rather than repaired.
Light: The Cumulative Threat
Light damage is cumulative and irreversible. It fades pigments and dyes and can yellow or weaken paper. Ultraviolet radiation is especially harmful, but visible light also causes change over time.
General good practice includes:
- Never hanging works in direct sunlight.
- Keeping light levels low for sensitive works; around 50 lux is a commonly cited guideline.
- Using UV-filtering glazing in frames and UV film on windows.
- Rotating works so that each spends time resting in darkness.
Humidity and Temperature
Paper absorbs and releases moisture, expanding and contracting as it does. Rapid fluctuations cause cockling, flaking of paint layers and stress on bindings. High humidity encourages mould and insect activity, while very dry air can make paper brittle.
Aim for a stable, moderate environment. A relative humidity of around 40 to 55 percent and a comfortable, steady temperature are commonly recommended. Avoid hanging works above radiators or fireplaces, on exterior walls prone to damp, or in bathrooms and kitchens. A simple digital hygrometer helps you monitor conditions.
Handling with Care
Most accidental damage occurs during handling. Work with clean, dry hands; many conservators prefer clean hands to cotton gloves for paper because gloves reduce sensitivity and can snag. Support a sheet from beneath with a rigid board rather than lifting it by a corner.
Never touch painted or gilded surfaces, which may be flaking. With bound manuscripts, open the volume only as far as the binding allows and support the covers.
Storage Essentials
Unframed works should be stored flat in acid-free folders or archival boxes, interleaved with acid-free tissue. Keep storage off the floor and away from water pipes. Avoid rubber bands, paper clips, adhesive tape and ordinary cardboard, which can stain or damage paper over time.
When to Call a Conservator
Signs that warrant professional attention include flaking pigment, mould, tears, insect damage, old tape and discolouration. Do not attempt to clean, flatten or repair works yourself. A qualified paper conservator can assess the object and recommend appropriate treatment.
For more on the objects themselves, explore our miniature painting and calligraphy categories, or contact us with questions about a work in your collection.
Pests, Dust and Pollutants
Insects such as silverfish and booklice are attracted to paper, starch and adhesives, particularly in damp, undisturbed places. Regular, gentle inspection of storage areas and frames helps catch problems early. Keep display and storage spaces clean and avoid bringing food or plants nearby.
Airborne pollutants and dust can also discolour paper and abrade delicate surfaces. Closed archival boxes and well-sealed frames offer useful protection. Some wooden furniture, paints and varnishes release acidic vapours, so allow newly painted rooms or cabinets to air thoroughly before placing works inside. If you discover insect activity or mould, isolate the affected item in a sealed bag and seek professional advice promptly rather than attempting treatment yourself.
Frequently Asked Questions
How much light can works on paper tolerate?
Many conservators recommend low light levels, often around 50 lux for sensitive works, with limited display periods. Ask a conservator for advice specific to your piece.
What humidity is best for paper?
A stable relative humidity in a moderate range, commonly cited as roughly 40 to 55 percent, is generally advised. Stability matters as much as the precise figure.
Can I remove old tape from a drawing myself?
No. Removing tape or adhesives can tear paper and lift pigment. Always consult a professional paper conservator.
