Abstract

Ink formulations suitable for deposition upon the intermediate transfer member of an indirect printing system and for transfer therefrom to a substrate. The inks are aqueous inkjet inks comprising an organic polymeric resin and a colorant. Ink film constructions including a plurality of continuous ink films fixedly adhered to the printing substrate that can be obtained with these inks are also disclosed. The inks and the printed constructions are such that the ink films and the dried inks composing them have a first dynamic viscosity within a range of 106cP to 5·107cP at at least a first temperature within a first range of 60°C to 87.5°C, and a second dynamic viscosity of at least 6·107cP, for at least a second temperature within a second range of 50°C to 55°C.

IPC Classes  ?

• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes

Abstract

An ink film construction including: (a) a printing substrate; and (b) a plurality of continuous ink films, fixedly adhered to a surface of the printing substrate, the ink films containing at least one colorant dispersed in an organic polymeric resin; the ink films having a first dynamic viscosity within a range of 106cP to 3108cP for at least a first temperature within a first range of 90°C to 195°C, the ink films having a second dynamic viscosity of at least 8107cP, for at least a second temperature within a second range of 50°C to 85°C.

IPC Classes  ?

• C09D 11/02 - Printing inks

Abstract

An ink film construction comprising: (a) a printing substrate; and (b) at least one ink film, fixedly adhered to a top surface of the printing substrate, the ink film having an upper film surface distal to the top surface of the substrate, wherein a surface concentration of nitrogen at the upper film surface exceeds a bulk concentration of nitrogen within the film, the bulk concentration measured at a depth of at least 30 nanometers below the upper film surface, and wherein a ratio of the surface concentration to the bulk concentration is at least 1.1 to 1.

IPC Classes  ?

• C09D 11/02 - Printing inks
• B41J 2/01 - Ink jet

Abstract

An ink film construction including: (a) a first printing substrate selected from the group consisting of an uncoated fibrous printing substrate, a commodity coated fibrous printing substrate, and a plastic printing substrate; and (b) an ink dot set contained within a square geometric projection projecting on the first printing substrate, the ink dot set containing at least 10 distinct ink dots, fixedly adhered to a surface of the first printing substrate, all the ink dots within the square geometric projection being counted as individual members of the set, each of the ink dots containing at least one colorant dispersed in an organic polymeric resin, each of the dots having an average thickness of less than 2,000nm, and a diameter of 5 to 300 micrometers; each ink dot of the ink dots having a generally convex shape in which a deviation from convexity, (DCdot), is defined by: DCdot = 1 - AA/CSA, AA being a calculated projected area of the dot, the area disposed generally parallel to the first fibrous printing substrate; and CSA being a surface area of a convex shape that minimally bounds a contour of the projected area; wherein a mean deviation from convexity (DCdot mean) of the ink dot set is at most 0.05.

IPC Classes  ?

• C09D 11/02 - Printing inks
• B41J 2/01 - Ink jet