| Name | reversible temperature indicating coating (IV) |
| Synonyms | reversible temperature indicating coating (IV) |
| Use | A special coating used to indicate the surface temperature and temperature distribution of an object. |
firstly, the color-changing pigment COCl2?2C6H12N4?10H20 is prepared by reacting urotropine and CoCl2HO in a certain proportion in the solution, and then the color-changing pigment is filtered and dried, and then the temperature-indicating coating is prepared by combining the color-changing pigment with alkyd varnish, pyrophyllite filler and xylene solvent in a certain proportion.