Interval thermochromic inks for printing
Interval thermochromic inks are inks which retain their colours in a set range of temperatures (e.g. 30° C – 50°C) and discolour when the temperature goes above or below that range.
The change of colours of interval thermochromic inks is reversible, which means that they can be coloured and discoloured multiple times by maintaining or going beyond a specific temperature interval.
The change in a colouring-discoloration cycle takes place in a range of several degrees, similarly to other reversible thermichromic inks.
Interval thermochromic inks can be used as indicators of maintaining temperature of the product at a certain range.
If the temperature goes below this range, the ink will discolour and the same will happen when the temperature exceeds that range.
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