| titleOfInvention |
Method for proving authenticity using naphthalocyanine compound, signal transduction method, polymer welding method, method for producing lithographic printing plate, printing ink, toner, heat-shielding material, and method for producing naphthalocyanine compound |
| abstract |
Disclosed is a method for proving the authenticity of a product or a base material, which is characterized by using a compound represented by general formula (I).n[In the formula, R 11 to R 46 independently represent a hydrogen atom or a substituent, wherein any adjacent groups among , R 11 to R 46 may be bound to each other to form a ring; M represents a hydrogen atom, a metal ion, or a group containing a metal ion; and n represents 1 or 2.] In the method, the infrared ray absorption efficiency is high and the deterioration in infrared ray absorption over time is improved. |