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　　There is a type of anti-counterfeiting label called temperature change anti-counterfeiting label.The principle of temperature change anti-counterfeiting label is to use temperature change ink.In temperature change anti-counterfeiting label,it can be divided into reversible thermosensitive ink and irreversible thermosensitive ink.Below,the editor will introduce the characteristics of these two types of ink in detail.
　　1.Irreversible type
　　There are two types of thermal ink:color rendering and color changing.The appearance of the color rendering irreversible thermosensitive ink is colorless.After being heated,color appears,and after cooling,color no longer returns to colorless;The original color of irreversible ink changes from one color to another after being heated,and the color no longer returns to its original color after cooling.
　　2.Reversible type
　　There are three types of reversible types:coloration,fading,and discoloration.Color rendering can be reversible,resulting in a colorless appearance.When heated,color appears,and when cooled,color disappears and can be restored to colorless;Color fading is reversible as the original color disappears when heated,and can be restored when cooled down;The reversible color change type refers to the original color changing to another color after being heated,and the original color can be restored after being cooled down;Colors can be sensitively changed with changes in ambient temperature,thereby giving the colored object a dynamic color effect.