Learn proper storage methods and working principles of label paper, including carbonless and thermal types. Understand layered structure, color development mechanisms, and storage tips to avoid damage and ensure stable printing and adhesion performance.

This article reveals the layered structure of carbonless paper and its pressure-triggered coloring principle, and details the core differences between carbonless paper and thermal paper in coloring mechanism and characteristics to help you distinguish the two inkless coloring papers accurately.

Carbon-free paper is divided into upper paper, middle paper and lower paper. On the next side of the upper and middle pages, a certain drug is applied, and on the upper side of the middle and next pages, another chemical is applied. After combining in the order of the upper, middle and lower pages, when affected by the impact of the printing needle or the pressure of the pen tip, two different drugs will meet and show wonderful trace to achieve the purpose of copying.