How to Store Art Prints to Prevent Yellowing

By EXPULSE SHOP | Published: 2026-10-17

Category: Tips & Care

Learn the best methods to store anime art prints and prevent yellowing over time. Use acid-free sleeves, control humidity, and avoid direct sunlight to keep your prints pristine.

Quick answer

Store art prints flat in a cool, dark, and dry environment using acid-free sleeves or portfolios. Avoid direct sunlight, high humidity, and cheap storage materials that cause yellowing. For best results, handle prints with clean hands or cotton gloves.

Why prints yellow and how to slow it down

Yellowing happens when paper reacts to light, heat, moisture, or acidic materials in storage. The lignin in wood-pulp paper is a major culprit—it oxidizes and turns yellow over time. Even prints on light card stock, like those from EXPULSE SHOP, benefit from acid-free storage to delay this process. The key is controlling three things: light exposure, humidity, and the pH of materials touching the print.

Choosing the right storage supplies

Not all sleeves are equal. Look for acid-free, lignin-free archival sleeves or portfolios. Avoid PVC-based plastics—they emit acids that accelerate yellowing. Polypropylene or Mylar sleeves are safe bets. If you store multiple prints together, place acid-free paper between each one to prevent ink transfer and chemical reactions. A flat storage box made of archival cardboard is ideal for long-term keeping.

Step-by-step storage process

1. Clean your hands and workspace: Wash and dry your hands thoroughly, or wear cotton gloves. Oils and dirt from fingers transfer to the print surface and can cause discoloration over time. Work on a clean, flat table free of food or dust. Common mistake: touching the print surface directly with greasy hands leaves residue that attracts dirt and speeds yellowing.
2. Slip the print into an acid-free sleeve: Use a polypropylene or Mylar sleeve labeled acid-free and lignin-free. Slide the print in gently without forcing it—bending the corners damages the paper. If the sleeve is too tight, size up rather than cramming. Checkpoint: avoid PVC sleeves; they release acids that yellow prints within months.
3. Place the sleeved print flat in a storage box: Use an archival-quality flat box or a portfolio case. Lay the print face-up and stack no more than 10-15 prints per box to avoid pressure damage. Add a sheet of acid-free paper between each print for extra protection. Common mistake: storing prints vertically like books can cause warping or sagging over time.
4. Store in a cool, dark, dry location: Keep the box in a closet or drawer away from windows, radiators, and basements. Ideal temperature is 60-75°F with 40-50% relative humidity. Use silica gel packets inside the box if you live in a humid climate. Checkpoint: never store prints in attics or garages—temperature swings and moisture cause rapid yellowing.
5. Check on your prints every 6-12 months: Open the box and inspect each print for signs of yellowing, foxing (small brown spots), or mold. Rotate the stack so prints at the bottom get equal exposure to air. Replace any damaged sleeves immediately. Common mistake: sealing prints away and forgetting them for years allows small issues to become permanent damage.

Recommended prints for practice

Nana Bunana Girl Foil Print: Printed on light card stock / 100lb coated paper with holographic foil in place of black detailing. The holographic foil adds a layer that can be sensitive to humidity and scratches. Storing it flat in an acid-free sleeve preserves the foil's shine and prevents tarnishing.
Gyakubunny (2020) Print: Size: 11 x 17 inches, printed on light card stock / 100lb coated paper. This larger print needs a flat storage box or a portfolio that fits the full 11x17 size without folding. Folding creases the paper and can cause yellowing along the fold line.