autographs
How to Store Autographed Photos and Documents
Archival sleeves, acid-free folders, climate, and handling — the specifics for ink on paper.
Published March 22, 2026Updated May 20, 20261 min read
Short answer
Use polyester (Mylar), polyethylene, or polypropylene sleeves — never PVC. Store flat in acid-free folders, in stable rooms at 40–55% RH, away from light. Handle only with gloves; never lay flat on bare paper.
The materials
- Mylar sleeves for highest-value pieces.
- Polyethylene or polypropylene sleeves for routine storage.
- Acid-free file folders (lignin-free) for boxed storage.
- Acid-free archival boxes for long-term collection storage.
- Cotton or nitrile gloves for handling.
What to avoid
- PVC sleeves — off-gas chemicals that yellow ink and paper.
- Tape, glue, or rubber bands.
- Direct skin contact.
- Sunlight, fluorescent light, and incandescent bulbs above 60W.
- Attic, garage, or basement storage.
The annual routine
- Inspect for foxing (small brown spots from oxidation).
- Rotate displayed items into dark storage.
- Replace silica gel in closed storage.
- Re-photograph anything that's changed.
When to consult a conservator
If a valuable signed photo shows water damage, mold, or foxing, a paper conservator can usually stabilize the piece. Disclose conservation in any future sale.