Temperature measurement colors
Temperature measurement colors (also thermochromic colors or thermochromic colors called, Eng. TSP for temperature sensitive painting ) are coating materials which temperature changes by color change or color change display.
The pigments used are complex salt compounds . By changing the temperature, for example, white becomes green or black becomes turquoise.
It is usually used by smearing a colored pencil on warm or hot objects or by applying varnish to the cold surface. For example, the temperature distribution on the surface can be made visible by applying it to hot machine parts. Furthermore, temperature measuring colors can be used as a security feature on banknotes, admission tickets or the like, as well as for creating effects, for example when touching advertising materials or as a simple form of a thermometer .
In addition to thermochromic inks, there are coatings that take advantage of the phenomena of photochromism (reaction to light) and hydrochromism (reaction to moisture).