Three heat-proof paper

Three heat-proof paper is a kind of heat-sensitive paper, mainly used for printing paper or labels. This paper is usually waterproof, oil and wear resistant, so it can preserve the printed content for a long time. Compared with ordinary thermal paper, the storage time of three thermal paper is longer, and some can even reach more than 10 years.

The manufacturing principle of three heat-proof paper is to coat a layer of "heat-sensitive paint" (heat-sensitive discoloration layer) on high-quality base paper. The paint changes color as the temperature changes, resulting in words or images. The advantages of three heat-resistant paper are: clear printing, easy to use, long storage period, easy to fade or damage after printing, cheap.

At present, there are many brands of heat-sensitive paper on the market, such as Guanhao, Xinwei, etc., which usually mark the shelf life of the three defenses