(Of a substance) undergoing a reversible change of colour when heated or cooled.
- Others used materials with thermochromic pigments that change colour at different temperatures.
- The design is printed in thermochromic ink, so when the stamp is heated - such as by placing a finger on it - the ink changes colour to reveal an ion enclosed within the ‘buckyball’ cage.
- This gives a thermochromic transition temperature of 29°C, which is near ideal for intelligent window coatings.
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