摘要:
Disclosed is a method of proving the authenticity of goods or a support comprising using a compound represented by Formula (I).
wherein, in Formula (I), each of R 11 to R 46 independently represents a hydrogen atom or a substituent group, wherein when a benzene ring is substituted with any of R 11 to R 46 , any groups adjacent to each other among R 11 to R 46 may be bonded 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. The infrared absorption efficiency is high and the deterioration in infrared absorption over time is ameliorated. The infrared absorption efficiency is high and the deterioration in infrared absorption over time is ameliorated.
摘要:
[PROBLEMS] To provide an infrared absorbing material which is readable with an infrared ray, and an ink, a toner, a printed matter, an image recording method and an image information detecting method that use the infrared absorbing material. [MEANS FOR SOLVING THE PROBLEMS] An infrared absorbing material, that is represented by the following Formulae (1a) or (1b) and comprises an acidic ion in a content of 0.1% by mass or less with respect to a total mass of the infrared absorbing material:
wherein, in Formulae (1a), M represents a metal atom or a substituted metal atom and, in Formulae (1a) and (1b), each of Ar 1 , Ar 2 , Ar 3 , Ar 4 , Ar 5 , Ar 6 , Ar 7 and Ar 8 independently represents a substituted or unsubstituted aryl group.