Temperature-indicating paint is a special paint that indicates the temperature change of the surface of an object by changing its color or shape. There are two main categories: one is reversible temperature-indicating coatings. Reversible paint changes color when the coating is heated to a certain temperature, and returns to its original shape after cooling. The other category is irreversible coatings. Irreversible paints change color due to chemical changes after being heated, so they will no longer return to the original color.
The main characteristics of temperature-indicating paint are
(1) It is especially suitable for places where ordinary thermometers cannot or are difficult to measure, such as large-area object surfaces, complex components, and continuously operating components.
(2) The temperature distribution on the surface of the object can be measured with multi-color temperature-indicating paint.
(3) The irreversible temperature-indicating paint can be used as a permanent record of the temperature change of the object.
(4) It is easy to use and does not require any instrumentation.
The disadvantage of temperature-indicating paint is that the accuracy of temperature measurement is worse than that of general temperature measuring instruments, and it is affected by ambient temperature, humidity and heating time. Such as reversible temperature-indicating paint, once it changes color, it needs a certain temperature and time to restore the original color, and the recovery speed is very slow.
