Magenta Thermochromic 31ºC

General Information

Thermochromic ink changes its colour when temperature changes, either as visible colours that change their shade as a result of a change in temperature, or by changing from one colour to a different one.

Most temperatures and colour changes are reversible, that is, when recovering the initial temperature they also recover the initial colour, but when reacting to certain temperatures the change can be irreversible.

It can be used to verify the authenticity of a security document or as an optical warning in certain products, such as beverages, medicines, and also to control cooling and heating equipment.

Usual temperatures range between –10C and +60C, but it is possible to make inks that react to more extreme temperatures.

The most common temperatures are:

• +15C. For cold beverages.
• +31C. To rub with the finger.
• +47C. For warm beverages.

Temperatures available from Security Inks range from -25C to 60C, although 15C, 31C and 47C are the best sellers. Depending on the temperature the change in the colour is different, and thus:

• 15C Thermochromic inks: have colour below this temperature, and at higher temperatures they become invisible.
• 31C Thermochromic inks: are visible below this temperature, and at higher temperatures they become invisible.
• 47C Thermochromic inks: are visible below this temperature and at higher temperatures they become colourless.

Security Inks has basics colours such as yellow, orange, red, green blue and black, but also colours according to a sample and Pantone colours.