Postal Durability vs. Aesthetics
Buyers frequently ask: "Will decorative envelope seals tear or detach during high-speed automated sorting at post processing centers?" High-performance seals require an optimal balance between face-stock tensile strength (specifically 50-80 GSM Japanese rice paper or 25-50 micron PET film) and high-shear pressure-sensitive adhesive that resists edge-lifting when subject to friction and pneumatic bending.