ARTICLE PRINTED WITH INFRARED DYE

1 . A printed article comprising a substrate and printed data that is not visible to the unaided eye, the printed data including a dye that fluoresces in the infrared region of the electromagnetic spectrum and a binder including a polyvinyl acetal.

2 . A printed article comprising a substrate and printed data that is not visible to the unaided eye, the printed data including a dye that fluoresces in the infrared region of the electromagnetic spectrum and a binder including a polyvinyl acetal, wherein the weight ratio of the dye relative to the combined weight of the dye and binder is in a range of 0.001 to 0.025.

3 . The printed article of claim 2 , wherein the dye has a structure according to Structure I

wherein R1 and R2 are each independently selected alkyl groups having 1 to 16 carbon atoms;

R3, R4, R5, and R6 are independently selected from hydrogen, alkyl, alkenyl, aryl, halo, cyano, alkoxy, phenoxy, ester, amide, amine, cyano, ketone, sulfide, sulfoxide, sulfone, sulfonate, sulfonamide, carboxylate nitro, or a polymeric moiety;

R7, R8, R10 and R11 are independently selected from hydrogen or alkyl;

R9 is selected from hydrogen, halogen, aryl, sulfide, sulfoxide, sulfone, amine, a heterocyclic moiety, phenoxide, alkoxide or cyano; and

Y − is an anion.

4 . The printed article of claim 2 , wherein the dye has a structure according to Structure II

wherein R1 and R2 are independently selected alkyl groups having 1 to 18 carbon atoms;

Z and Z′ are independently selected from —O—, —S—,

wherein R3, R4 and R5 are independently selected alkyl groups;

R7, R8, R9, R10, R11, R12 and R13 are independently selected from hydrogen, alkyl, amine, aryl, sulfone, triazole or halo;

R6 and R16 are independently selected from hydrogen, alkyl, alkenyl, aryl, fused aryl, halo, cyano, alkoxy, phenoxy, ester, amide, amine, nitrile, ketone, sulfide, sulfoxide, sulfone, sulfonate, sulfonamide, carboxylate nitro, or a polymeric moiety; and

Y − is an anion.

5 . The printed article of claim 2 , wherein the dye has a structure according to Structure III

wherein Z is independently selected from hydrogen, alkyl, alkenyl, aryl, halo, cyano, alkoxy, aryloxy, ester, ether, amide, amine, cyano, ketone, sulfide, sulfoxide, sulfone, nitro, or a polymeric moiety;

at least one Z is other than hydrogen; and

M is 2H, vanadium oxide, zinc, aluminum chloride, silicon oxide, or magnesium.

6 . The composition of claim 2 , wherein the dye has a structure according to Structure IV

wherein R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 are independently selected from hydrogen, alkyl, aryl, heteroaryl, halogen, amino, mercapto, hydroxyl, aryloxy or alkoxy.

7 . The printed article of claim 2 , wherein the dye has a structure according to Structure V

wherein R1 and R2 are independently selected aromatic rings; and

R3 and R4 are independently selected alkyl having 1 to 18 carbon atoms or aryl having 6 to 10 carbons.

8 . The composition of claim 3 further including one or more dyes selected from:

wherein R1 and R2 are independently selected alkyl groups having 1 to 18 carbon atoms;

Z and Z′ are independently selected from —O—, —S—,

wherein R3, R4 and R5 are independently selected alkyl groups;

R7, R8, R9, R10, R11, R12 and R13 are independently selected from hydrogen, alkyl, amine, aryl, sulfone, triazole or halo;

R6 and R16 are independently selected from hydrogen, alkyl, alkenyl, aryl, fused aryl, halo, cyano, alkoxy, phenoxy, ester, amide, amine, nitrile, ketone, sulfide, sulfoxide, sulfone, sulfonate, sulfonamide, carboxylate nitro, or a polymeric moiety;

Y − is an anion;

and

wherein Z is independently selected from hydrogen, alkyl, alkenyl, aryl, halo, cyano, alkoxy, aryloxy, ester, ether, amide, amine, cyano, ketone, sulfide, sulfoxide, sulfone, nitro, or a polymeric moiety;

at least one Z is other than hydrogen; and

M is 2H, vanadium oxide, zinc, aluminum chloride, silicon oxide, or magnesium.

9 . The printed article of claim 2 wherein the polyvinyl acetal is polyvinyl butyral.

10 . The composition of claim 2 wherein the weight ratio of the dye relative to the combined weight of the dye and binder is in a range of 0.007 to 0.025.

11 . The composition of claim 2 further including a hydroquinone derivative or ascorbic acid.