Storing and showing works on paper from the turn of the century

Paper from around 1900 arrives with a hundred years of history and no reserve of tolerance left. Damage from this point is cumulative and mostly irreversible, which puts the responsibility on storage rather than on treatment. The good news is that the whole subject comes down to a few decisions you make once. Light, humidity, materials and location cover almost everything.

Light is the first and the largest issue. Fading is additive, so an hour of bright light today and an hour next week do the same work as two hours in one afternoon. Museums keep sensitive works on paper at low light levels, commonly around fifty lux, and they rotate displays rather than leave sheets up permanently. At home the practical version is a dim wall and a rest period.

Framing that protects rather than damages

The frame package is where most avoidable harm is built in. The sheet should be hinged, not glued, using Japanese paper hinges and wheat starch paste, both of which can be removed later with moisture. Pressure sensitive tape of any kind will stain the paper permanently, and the stain spreads over years. Dry mounting bonds a sheet to board with heat and takes a large share of value with it.

Mount board and backing board should be conservation grade rather than ordinary card, because ordinary card burns a brown line into the sheet at the window edge. The mount also keeps the paper off the glazing, which matters when condensation forms. Glazing with ultraviolet filtering cuts part of the damage, though it does not make bright light safe. Filtered glazing plus a dim wall is the combination that works.

Environment matters as much as materials. Paper takes up and gives off moisture with the air around it, so it expands, contracts and eventually cockles when humidity swings. Stability counts for more than hitting a particular number, and a steady middle range is the target. Avoid exterior walls, fireplaces, bathrooms and any room where the heating goes on and off sharply.

1. Hinge the sheet with Japanese paper and wheat starch paste rather than any adhesive tape
2. Use conservation grade mount and backing boards, and replace old acidic card when you reframe
3. Fit glazing with ultraviolet filtering and seal the back of the frame against dust
4. Hang away from direct sun, exterior walls and heat sources, and keep the light level low
5. Rotate framed sheets off the wall for long rests instead of leaving them up for years
6. Photograph the sheet out of the frame so you have a dated record of its condition

Unframed material needs a system rather than a drawer. Store sheets flat in a box made for the purpose, interleaved with smooth conservation paper, with the heaviest items at the bottom. Charcoal, pastel and soft graphite move at a touch, so those sheets need a spacer rather than direct contact. Never store paper in a basement, an attic or against a cold outside wall.

Handling and the records that follow

Handle sheets with clean dry hands and support the whole object from underneath, since a sheet lifted by one corner tears along its own weakness. Gloves are less useful than clean hands for paper, because they reduce grip. Keep food, drink and pens away from the table entirely. Most of the damage that reaches the market came from an ordinary moment rather than from a disaster.

Nothing you do to a sheet of paper is as important as deciding how much light it will see over the next twenty years.

Institutions publish their display practice, and the collection pages at the Cleveland Museum of Art and Tate note when a work on paper is shown only occasionally. That rotation habit is the single practice worth copying at home. A sheet that spends most of its life in the dark keeps the qualities you paid for.