a4 do not bend envelopes
A4 Do Not Bend envelopes are specialized mailing solutions designed to protect important documents during transit. These sturdy envelopes, specifically sized to accommodate A4 papers (210 x 297 mm), feature prominent Do Not Bend markings that serve as clear instructions for postal workers and handlers. Constructed with high-quality, rigid materials, these envelopes provide superior protection against folding, creasing, and damage. They typically incorporate a secure peel-and-seal adhesive system that ensures contents remain safely enclosed throughout the delivery process. The envelopes often include additional reinforcement along the edges and corners, critical areas prone to damage during handling. Many variants come with a water-resistant coating that offers protection against moisture and environmental factors. These envelopes are particularly valuable for mailing certificates, photographs, artwork, legal documents, and other materials that must maintain their pristine condition. The clear Do Not Bend instruction is usually printed in bold, easily visible text on both sides of the envelope, often in multiple languages to ensure international comprehension.