Irreversible thermochromic inks for printing
![](https://splinx.pl/wp-content/uploads/2021/03/shutterstock_1505896151-730x350.jpg)
![](https://splinx.pl/wp-content/uploads/2021/03/shutterstock_1505896151-730x350.jpg)
Irreversible thermochromic inks react with a permanent colour change when the ink reaches a certain limit temperature.
![](https://splinx.pl/wp-content/uploads/2021/03/shutterstock_1566291013-1024x681.jpg)
After reaching a specific temperature, together with its increase, the ink turns from transparent into coloured. The change is permanent and irreversible. The lowest temperature of change is 60°C, the highest ones reach even up to 200°C.
Irreversible thermochromic inks are used as indicators of exceeding high temperatures or of sterilisation. They can also be used for coating thermal papers or other thermosensitive materials.
![](https://splinx.pl/wp-content/uploads/2021/03/shutterstock_1296988243-1024x683.jpg)
![](https://splinx.pl/wp-content/uploads/2021/03/shutterstock_1296988243-1024x683.jpg)
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