Ink film constructions
AssigneeLanda Corporation Ltd.
InventorsBenzion Landa, Sagi Abramovich, Galia Golodetz, Gregory Nakhmanovich
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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.
Claims20
An ink dot construction comprising:
- (a) a first fibrous printing substrate selected from the group consisting of an uncoated fibrous printing substrate and a commodity coated fibrous printing substrate;
- and
- (b) a plurality of ink dots, each ink dot of said ink dots fixedly adhered to a top substrate surface of said first printing substrate, said ink dots containing at least one colorant dispersed in an organic polymeric resin, each said ink dot covering a continuous area of said top substrate surface;
- each said ink dot being disposed entirely above said continuous area, such that a projected perpendicular line, extending down towards said top substrate surface, first meets said ink dot, before meeting said top substrate surface, at every point in said continuous area;
- each said ink dot having a diameter of 15 to 300 micrometers;
- each of said ink dots being characterized by a dimensionless aspect ratio (Raspect) defined by:
- Raspect=Ddot/Hdot
- wherein Ddot is said diameter;
- and Hdot is said average thickness:
- said aspect ratio being at least 50,
- each of said ink dots having an average or characteristic thickness of at most 1,800 nm.
An ink film construction comprising:
- (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 said first printing substrate, said ink dot set containing at least 10 distinct ink dots, fixedly adhered to a surface of said first printing substrate, all said ink dots within said square geometric projection being counted as individual members of said set, each of said ink dots containing at least one colorant dispersed in an organic polymeric resin, each of said dots having an average thickness of less than 2,000 nm, and a diameter of 5 to 300 micrometers;
- each ink dot of said 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 said dot, said area disposed generally parallel to said first fibrous printing substrate;
- and
- CSA being a surface area of a convex shape that minimally bounds a contour of said projected area;
- wherein a mean deviation from convexity (DCdot mean) of said ink dot set is at most 0.05;
- each said ink dot covering a continuous area of said top substrate surface;
- each said ink dot being disposed entirely above said continuous area, such that a projected perpendicular line, extending down towards said top substrate surface, first meets said ink dot, before meeting said top substrate surface, at every point in said continuous area.
Dependencies are inferred from the claim text.