Patent ID: 6953613

Claim:
An ink jet ink set and image-recording element combination comprising: A) an ink jet image-recording element having a gloss value of at least 5 when measured at 60°; B) a pigment based ink jet ink set comprising at least one pigment-based ink said pigment-based ink comprising a pigment having a median particle size of less than 0.3 μm; wherein the normalized differential specular reflectance for each ink in the set, NΔR S (X), is less than 1.25 when calculated according to Equation 1: NΔR S ( X )=[ NΔR S ( Xn )] max Equation 1 where X represents the ink, n is an integer associated with each density patch printed on the image-recording element as part of a test image, and [NΔR S (Xn)] max is the maximum value of the [NΔR S (Xn)] values that are calculated for the density patches printed using ink X; wherein the test image for each ink in the set consists of a series of at least ten density patches printed such that the ink laydown on the patches increases incrementally, from no ink laydown to a maximum level generating a density of at least 1.5; and wherein the normalized differential specular reflectance value for each patch, NΔR S (Xn), is determined according to Equation 2: N ⁢ ⁢ Δ ⁢ ⁢ R S ⁡ ( Xn ) = [ R Smax ⁡ ( Xn ) - R Smin ⁡ ( Xn ) ] R Smean ⁡ ( Xn ) Equation ⁢ ⁢ 2 where R Smax (Xn) is the maximum specular reflectance over the visible spectral region between 390 nm and 720 nm for patch Xn, R Smin (Xn) is the minimum specular reflectance over the visible spectral region between 390 nm and 720 nm for patch Xn, and R Smean (Xn) is the average specular reflectance over the visible spectral region between 390 nm and 720 nm for patch Xn; wherein the pigment-based ink comprises a water soluble polymer.