Abstract: This invention is related to an inkjet ink comprising water, a first self-dispersing pigment, and a second self-dispersing pigment, wherein said first self-dispersing pigment comprises a charged group bonded directly to the surface thereof, and said second self-dispersing pigment comprises a charged group bonded through a linking group to the surface thereof.

Abstract: An inkjet ink comprising water, a self-dispersing carbon black pigment, and a water soluble polymer containing acid groups neutralized by an inorganic base, wherein said carbon black pigment comprises greater than 11 weight % volatile surface functional groups. The inks of the present invention have improved print density on plain paper, good text quality, improved print durability such as waterfastness and excellent jetting performance over an extended printing period. They further provide good print uniformity over a wide variety of inkjet receivers.

Abstract: A water based inkjet ink set with excellent image stability, durability and quality, comprising at least one cyan ink, at least one magenta ink, at least one yellow ink, at least one black ink, and at least one colorless protective ink, wherein: (a) the cyan, magenta, yellow, and black inks each comprise a pigment colorant; (b) the cyan, magenta, yellow, black, and colorless protective inks each comprise a polymeric binder additive; and (c) the surface tensions of the inks have the following relationships: (i) the dynamic surface tension at 10 milliseconds surface age for all inks of the ink set is greater than or equal to 35 mN/m, (ii) the static surface tensions of the yellow ink and of the colorless protective ink are at least 2.0 mN/m lower than the static surface tensions of the cyan, magenta and black inks of the ink set and (iii) the static surface tension of the colorless protective ink is at least 1.0 mN/m lower than the static surface tension of the yellow ink.

Abstract: An ink set composition, an apparatus, and a method of providing an image on a receiver are provided. The method includes operating a printhead having a first segment that applies a gloss matching fluid to the non-imaged area of the printed area of the image and a second segment that applies an ink set having at least one color to the imaged area of the printed area of the image, wherein the ink set has a predetermined minimum gloss value (GVmin) and a maximum gloss value (GVmax), and the gloss matching fluid has a predetermined gloss value (GVGMF), wherein the predetermined gloss value GVGMF satisfying the following condition: 0.1 GVmin?GVGMF ?1.5 GVmax, wherein GVmin and GVmaxare predetermined gloss values calculated according to the following equations: GVmin=MIN(GV1, GV2, . . . , GVi, . . . , GVn) GVmax=MAX(GV1, GV2, . . . , GVi, . . . , GVn) where, i is a variable which identifies a certain color patch used in the evaluation, and n is the total number of color patches used in the evaluation.

Abstract: An ink jet ink set and recording element combination including: A) a porous ink jet recording element having a 60° specular gloss of at least about 30; and B) a pigment based ink jet ink set having at least two inks; wherein the RGD value is less than 40% when 60° is used as the specular angle and the RGD value is calculated according to Equation (A): RGD ? ? ? % = ? ? ? I = 1 N ? ? Gloss ? ( Imaged ? ? ? Areas ) I - Gloss ? ( Non ? ? ? Imaged ? ? ? Areas ) ? ? I = 1 N ? Gloss ? ( Imaged ? ? ? Areas ) I Equation ? ? ? ( A ) Where I is a variable which identifies a certain color patch used in the evaluation, N is the total number of color patches used in the evaluation.

Abstract: A color set for forming an ink jet image comprising: at least two color inks, each ink comprising a carrier and a pigment; wherein the Relative Gloss Variability (RGV) (Equation A) among inks is less than 10%; when 60° is used as the specular angle. RGV ? ( % ) = ? I = 1 N ? ? ( Gloss ? ( Imaged ? ? ? Area ) I - AG ) ? AG N Where AG = ? I = 1 N ? Gloss ? ( Imaged ? ? ? Area ) I N Equation ? ? ? ( A ) I is a variable which identifies a certain color patch used in the evaluation, N is the total number of color patches used in the evaluation.

Abstract: An ink jet ink set and recording element combination comprising: A) a porous ink jet recording element having a 60° specular gloss of at least about 5; and B) a pigment based ink jet ink set comprising at least two inks; wherein the RGD value is less than 40% when 60° is used as the specular angle and the RGD value is calculated according to Equation (A): 1 RGD ⁢   ⁢ % =   ⁢ ∑ I = 1 N ⁢ &LeftBracketingBar; Gloss ⁡ ( Imaged ⁢   ⁢ Areas ) I - Gloss ⁡ ( Non ⁢   ⁢ Imaged ⁢   ⁢ Areas ) &RightBracketingBar; ∑ I = 1 N ⁢ Gloss ⁡ ( Imaged ⁢   ⁢ Areas ) I Equation ⁢   ⁢ ( A )

Abstract: An ink jet ink set and recording element combination including A) a porous ink jet recording element having a 60° specular gloss of at least about 5; and B) a pigment based inkjet ink set including at least two inks; wherein the RGD value is less than 40% when 60° is used as the specular angle and the RGD value is calculated according to Equation (A): RGD ⁢   ⁢ % = ∑ I = 1 N ⁢ &LeftBracketingBar; Gloss ⁢  

Abstract: An ink set composition, an apparatus, and a method of providing an image on a receiver are provided. The method includes operating a printhead having a first segment that applies a gloss matching fluid to the non-imaged area of the printed area of the image and a second segment that applies an ink set having at least one color to the imaged area of the printed area of the image, wherein the ink set has a predetermined minimum gloss value (GVmin) and a maximum gloss value (GVmax), and the gloss matching fluid has a predetermined gloss value (GVGMF), wherein the predetermined gloss value GVGMF satisfying the following condition: 0.1GVmin≦GVGMF≦1.

Abstract: A method of selecting inks within an inkjet ink set for color printing includes: a) providing at least two color inks, each ink having a carrier and a pigment; b) printing the above inks onto a receiver using test images consisting of single color patches of a Dmax density (100% dot coverage); c) measuring the gloss level of each patch at a predefined specular angle; d) calculating the Relative Gloss Variability (RGV) values of the ink set based on the definition in Equation A; and e) selecting inks for the color set such that the Relative Gloss Variability (RGV) among inks is less than 10% when 60° is used as the specular angle: RGV ⁡ ( % ) = ∑ I = 1 N

Abstract: A method of selecting a pigment ink set and receiver in combination including: printing at least two color inks onto a set of receiver to form single color patches of a Dmax density (100% dot coverage); measuring the gloss level of each patch and the receiver at a predefined specular angle; calculating the Relative Gloss Difference (RGD%) value of the ink set and receiver combination; and selecting the ink set and receiver such that RGD value is less than 40% when 60° is used as the specular angle, and the RGD value is calculated according to Equation (A): RGD ⁢   ⁢ % = ∑ I = 1 N

Abstract: An ink jet ink set and recording element combination including A) a porous ink jet recording element having a 60° specular gloss of at least about 5; and B) a pigment based ink jet ink set including at least two inks; wherein the RGD value is less than 40% and RGV value among inks is less than 10% when 60° is used as the specular angle; the RGD and RGV values are calculated according to Equations (A) and (B), respectively:   ⁢ Equation ⁢   ⁢ ( A ) RGD ⁢   ⁢ % = &AutoLeftMatch;   ⁢ ∑ I =

Abstract: An ink jet ink set and recording element combination comprising: A) a porous ink jet recording element having a 60° specular gloss of at least about 5; and B) a pigment based inkjet ink set comprising at least two inks; wherein the RGD value is less than 40% when 60° is used as the specular angle and the RGD value is calculated according to Equation (A): 1 RGD ⁢   ⁢ % = ∑ I = 1 N ⁢ &LeftBracketingBar; Gloss ⁢   ⁢ ( Imaged ⁢   ⁢ Areas ) I - Gloss ⁢   ⁢ ( Non ⁢   ⁢ Imaged ⁢   ⁢ Areas ) &RightBracketingBar; ∑ I = 1 N ⁢ Gloss ⁢   ⁢ ( Imaged ⁢   ⁢ Areas ) I Equation ⁢   ⁢ (A)

Abstract: A color set for forming an ink jet image comprising:

Abstract: A method of selecting pigment ink set and a receiver combination for inkjet color printing comprising:

Abstract: A method of selecting inks within an inkjet ink set for color printing comprises: a) providing at least two color inks, each ink comprising a carrier and a pigment; b) printing the above inks onto a receiver using test images consisting of single color patches of a Dmax density (100% dot coverage); c) measuring the gloss level of each patch at a predefined specular angle; d) calculating the Relative Gloss Variability (RGV) values of the ink set based on the definition in Equation A; and e) selecting inks for the color set such that the Relative Gloss Variability (RGV) among inks is less than 10% when 60° is used as the specular angle: 1 RGV ⁡ ( % ) = ∑ I = 1 N ⁢ | ( Gloss ⁡ ( Imaged ⁢   ⁢ Area ) I - AG ) | AG / N Equation ⁢   ⁢ ( A )

Abstract: An ink jet ink set and recording element combination comprising: A) a porous ink jet recording element having a 60° specular gloss of at least about 5; and B) a pigment based ink jet ink set comprising at least two inks; wherein the RGD value is less than 40% and RGV value among inks is less than 10% when 60° is used as the specular angle; the RGD and RGV values are calculated according to Equations (A) and (B), respectively: 1 RGD ⁢   ⁢ % = ∑ I = 1 N ⁢ &LeftBracketingBar; Gloss ⁢   ⁢ ( Imaged ⁢   ⁢   ⁢ Areas ) I - Gloss ⁢   ⁢ ( Non ⁢   ⁢ Imaged ⁢   ⁢ Areas &RightBracketingBar; ∑ I = 1 N ⁢ Gloss ⁡ ( Imaged ⁢   ⁢ Areas ) I Equation ⁢   ⁢ ( A ) RGV ⁢   ⁢ ( % ) = ∑ I = 1 N ⁢ | ( Gloss ⁡ ( Imaged ⁢   ⁢ Area ) I - AG ) | AG / N ⁢ &NewLin