Inkjet printing methods and inkjet ink sets
View Patent ↗An inkjet printing method including, in order, the steps of: a) providing at least two or more color inkjet inks of the same color and color density but having a different composition to an inkjet printer; b) mixing the two or more color inkjet inks in a controlled amount; and c) printing the mixture of the two or more color inkjet inks with the inkjet printer onto an ink-receiver. An inkjet printer and an inkjet ink set include two or more color inkjet inks of the same color and color density but having a different composition.
1. An inkjet ink set coupled to an inkjet printer, the inkjet ink set comprising:
at least two or more pigmented non-aqueous color inkjet inks of the same color and color density; wherein
the at least two or more pigmented non-aqueous color inkjet inks have a different composition; and
the at least two or more non-aqueous color inkjet inks contain the same colorant or colorants.
2. The inkjet ink set according to claim 1 , wherein the at least two or more non-aqueous color inkjet inks of the same color and color density have a pair-wise color difference CIE ΔE2000 that is smaller than or equal to 2.0.
3. The inkjet ink set according to claim 1 , wherein the at least two or more non-aqueous color inkjet inks include a first ink and a second ink, and a surface tension of the first ink differs by more than 3.0 mN/m from that of the second ink.
4. The inkjet ink set according to claim 1 , wherein the at least two or more non-aqueous color inkjet inks include a first ink and a second ink, and a viscosity of the first ink differs by more than 5.0 mPa·s at 30° C. from that of the second ink.
5. The inkjet ink set according to claim 1 , wherein the at least two or more non-aqueous color inkjet inks include a first ink and a second ink, and an amount and/or type of a solvent in the first ink differs from that in the second ink.
6. The inkjet ink set according to claim 1 , wherein the at least two or more non-aqueous color inkjet inks include a radiation curable first ink and a radiation curable second ink, and an amount and/or type of a radiation curable monomer in the first ink differs from that in the second ink.
7. The inkjet ink set according to claim 1 , wherein the at least two or more non-aqueous color inkjet inks include a radiation curable first ink and a radiation curable second ink, and an amount and/or type of a polymerization initiator in the first ink differs from that in the second ink.
8. An inkjet printer comprising:
the inkjet ink set as defined by claim 1 .
9. The inkjet printer according to claim 8 , further comprising:
a device arranged to evaluate or measure properties related to print quality of the ink set.
10. The inkjet printer according to claim 9 , wherein the device arranged to evaluate or measure properties related to the print quality is incorporated in the inkjet printer.