Storing & Preserving Paper Currency

Why Paper Money Needs Special Care

Paper money is inherently more fragile than coins. While a coin can survive centuries buried underground and emerge recognizable, a banknote can be destroyed by a single encounter with water, fire, or careless handling. The cotton-linen blend used in US currency is more durable than ordinary paper, but it's still vulnerable to humidity, light, heat, acids, insects, mold, and physical damage. Proper storage isn't optional for paper money collectors — it's the difference between preserving your investment and watching it deteriorate.

Handling Paper Money

Before storage comes proper handling. The rules for paper money are even stricter than for coins:

• Clean, dry hands: Wash and thoroughly dry your hands before handling notes. Oils, acids, and moisture from skin transfer instantly to paper and can cause long-term staining and deterioration.
• Cotton gloves optional: Unlike coins, cotton gloves can actually snag on paper fibers and cause damage. Clean, dry bare hands with careful technique are often safer than gloved handling for paper money.
• Support the entire note: Never grip a banknote by one corner — the paper can crease, fold, or tear from the weight of the unsupported portion. Slide notes onto a flat support (like a piece of cardboard) when moving them.
• No food or drink: Even a tiny splash of coffee or a crumb can permanently stain a banknote.
• Work on a clean surface: Use a clean, lint-free cloth or padded surface when examining notes.

Recommended Storage Materials

Currency Sleeves and Holders

Mylar (polyester/PET) currency sleeves are the gold standard for individual note storage. Mylar is chemically inert, crystal-clear, and rigid enough to protect notes from bending and contact damage. Key specifications:

• Use archival-grade Mylar (also called Melinex or polyester film) — NOT PVC or vinyl, which release acids that damage paper
• Choose the correct size: Large-size notes need 8" × 5" holders; small-size notes need 6.5" × 3" holders
• BCW, Saflip, and Lighthouse brands make popular archival currency holders
• Notes should fit snugly without being forced — too-tight holders can bend or crease notes

Currency Albums and Binders

For organized collections, currency albums with individual pages hold notes in clear pockets:

• Lighthouse (Leuchtturm) currency albums: High-quality German-made albums with archival pages. Available in sizes for large and small notes.
• BCW currency pages: Three-ring binder pages with pockets sized for currency. Affordable and widely available. Ensure pages are PVC-free.
• Dansco currency albums: Premium albums with slide-in pages, similar to their popular coin albums.

PMG and PCGS Currency Holders

Third-party graded notes in PMG or PCGS Currency holders are already in excellent archival encapsulation. The holders provide:

• Inert plastic protection from environmental exposure
• Rigid support preventing bending and folding
• UV protection in some holder types
• Tamper-evident sealing

For high-value notes ($200+), PMG certification provides both grading and long-term storage protection in a single service.

Environmental Controls

The storage environment for paper money should be:

• Temperature: 65–70°F (18–21°C) with minimal fluctuation. Avoid attics, basements, and exterior walls where temperatures swing.
• Humidity: 30–40% relative humidity. Too humid promotes mold growth and foxing; too dry causes paper to become brittle. A hygrometer ($10–$20) monitors humidity levels.
• Light: Store in darkness when not viewing. UV light fades inks and degrades paper. If displaying notes, use UV-filtering glass or acrylic.
• Air quality: Away from cooking areas, cleaning chemicals, and industrial pollutants. Sulfur-bearing materials (rubber, wool) can cause discoloration.

Silica gel packets absorb excess moisture, and Intercept Technology products absorb atmospheric pollutants. Both are inexpensive additions that extend the life of your paper money collection.

What NOT to Do with Paper Money

• Never laminate: Lamination permanently damages notes and reduces their value to essentially zero for collectors. The heat and adhesive irreversibly alter the paper.
• Never use tape: Tape adhesive permanently stains paper and becomes impossible to remove without causing further damage. Even "archival" tape leaves marks.
• Never press or iron: Pressing notes to remove folds is considered "processing" and eliminates any chance of an EPQ designation from PMG. It also removes original paper texture.
• Never wash or clean: Chemical cleaning, soaking, or even gentle wiping removes original paper quality and inks. Professional conservation exists but should only be performed by qualified conservators for notes that justify the expense.
• Never use rubber bands: The sulfur in rubber causes brown staining that's irreversible. Use acid-free paper bands or leave notes unbound in sleeves.
• Never store in PVC holders: PVC (polyvinyl chloride) plastic off-gasses acids that cause a greasy residue and eventual paper degradation. Use only Mylar/PET sleeves.

Our comprehensive coin storage series covers environmental principles that apply equally to paper money. For currency-specific advice, the SPMC (Society of Paper Money Collectors) publishes preservation guidelines, and experienced currency dealers at coin shows can recommend specific storage products and demonstrate proper handling techniques.