CRYSTAL FORM OF A DITHIOLENE NICKEL COMPLEX

摘要

The present invention relates to a new crystal form of bis(diphenylimidazolidinetrithione- κS4, κS5)-, (SP-4-1)-nickel(II), a printing ink formulation for security printing and security documents, comprising the new crystal form of bis(diphenylimidazolidinetrithione-κS4, κS5)-, (SP-4-1)-nickel(II) as well as its use as IR absorber.