Red fluorescent materials with a non red visual color

Details Red fluorescent materials with a non red visual color Red fluorescent materials with a non red visual color

C - Chemistry, Metallurgy

09

K

C09K 11/06 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2055374

Solution inks have been discovered that have an acceptable red fluorescent signal for machine detection while emitting a different visual color in white light. The formulation is based on a combination of a fluorescent dyes and a non red dye belonging to the spectral sensitizer class of dyes. The red fluorescent dye and non-red dye are combined in a resin to form a toner. Because of a bathochronic shift, fluorescence at higher wave lengths is achieved. Upon dissolving the toner in a polar solvent, increased viscosity is achieved which results in an enhanced fluorescent signal as compared to prior fluorescent inks.

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