KNOWLEDGE ILLUSION on Instagram: "How China prevents document tampering one stamp at a time ✨📄 What looks like a simple stamp is actually a clever piece of security engineering. These stamps are designed to cross multiple pages at once, so the ink pattern aligns perfectly only when the document is intact. If even a single page is removed, replaced, or reordered, the circular seal instantly breaks its geometry and exposes tampering. The ink itself is often pressure-sensitive and fiber-reactive,