🧱 3D Printed Precision Frame

Each frame is printed using PETG or PLA+, both of which are archival-safe, inert plastics. Designed to fit standard U.S. banknotes (6.14" × 2.61") with a protective internal ridge.

🪟 Crystal Clear Mylar Windows

We hand-cut 4 mil Mylar for both sides. This archival polyester allows full visibility without exposing the note to air, handling, or dust.

📎 Acid-Free Mounting Tape

Mylar is attached using acid-free 3M #415 tape—never touching the note. This is a museum-trusted adhesive used for preservation.

🔩 Screw-Down Assembly

Frames are secured with steel thread-rolling screws. No glue, clips, or magnets. The note remains safe and the frame can be reopened as needed.

🚫 Acrylic & Cheap Plastic

Cheap acrylic often off-gasses VOCs and builds static. Experts like the Canadian Conservation Institute and The Conservation Center warn against using these materials near paper artifacts.

🚫 Magnets or Metal Closures

Magnets can compress, mark, or discolor notes over time. The AIC Conservation Wiki and Art Gallery of Ontario advise using archival barriers to protect against direct magnet contact.

✅ Safe Alternatives

Use only Mylar, PETG, PLA+, acid-free tape (like 3M #415), and screw-sealed designs. These are the materials trusted by museums and currency preservation professionals.

🔍 Symbol Legend

• ✅ – Fully supported, safe, or ideal
• ❌ – Not supported or potentially harmful
• ⚠️ – May vary by product; caution advised