Pigment compositions
AssigneeCiba Specialty Chemicals Corporation
InventorsIan Alexander Macpherson, Iain Frank Fraser, Sharon Kathleen Wilson, Peter Cyril White, Calum Hugh Munro, William Ewen Smith
Life of this patent
Estimating the term…
Abstract
The present invention provides an ink which contains a SERS--active metal aggregate containing a Raman active compound.
Claims16
An ink which contains as one of its components a surface enhanced resonance Raman scattering (SERRS) active sol.
A method of preparing a surface enhanced resonance Raman scattering (SERRS) active sol which comprises reducing a soluble precursor of a metal which exhibits surface enhanced resonance Raman scattering activity and adding a coding compound during the reduction.
A surface enhanced resonance Raman scattering (SERRS) active sol which is resinated with a natural or synthetic resin.
Dependencies are inferred from the claim text.