Yellow and magenta donor formulations for increased red vividness

Patent metadata

Field	Value
Publication number	US-12528946-B2
Application number	US-202418633903-A
Country	US
Kind code	B2
Filing date	Apr 12, 2024
Priority date	Apr 13, 2023
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

Yellow and magenta donor formulations that produce higher quality prints with fewer defects. The yellow and magenta formulas can be combined to form a red color representation with higher vividness and gamut.

First claim

The invention claimed is:

1 . A yellow donor, comprising:
a solvent mixture of toluene, methanol, and cyclopentanone; between about 12.40 and 16.40 mg/ft 2 of a first yellow dye; between about 3.67 and 4.85 mg/ft 2 of a second yellow dye; between about 1.74 and 2.30 mg/ft 2 of a third yellow dye; between about 16.57 and 21.92 mg/ft 2 of a cellulose acetate propionate; between about 2.61 and 3.45 mg/ft 2 of a plasticizer; between about 0.296 and 0.391 mg/ft 2 of spacer beads; and wherein the first yellow dye has a structure of:

the second yellow dye has a structure of:

and the third yellow dye has a structure of:

2 . The yellow donor of claim 1 , wherein the solvent mixture includes a composition of approximately 79% toluene, approximately 20% methanol, and approximately 1% cyclopentanone.

3 . The yellow donor of claim 1 , wherein the yellow donor is applied as a single laydown onto a print medium with a thickness of between about 0.25 and 0.74 microns.

4 . The yellow donor of claim 1 , wherein the cellulose acetate includes approximately 48% propionyl by weight, 1.7% hydroxyl by weight, and 1.3% acetyl by weight.

5 . The yellow donor of claim 1 , wherein the plasticizer is Paraplex G-25.

6 . The yellow donor of claim 1 , wherein the spacer beads comprise resin particles.

7 . The yellow donor of claim 6 , wherein the resin particles have an average particle diameter between about 0.5-6 microns.

8 . The yellow donor of claim 6 , wherein the resin particles have an average particle diameter between about 0.5-3.05 microns.

9 . A magenta donor, comprising:
a solvent mixture of toluene, methanol, and cyclopentanone; between about 7.83 and 10.35 mg/ft 2 of a first magenta dye; between about 7.83 and 10.35 mg/ft 2 of a second magenta dye; between about 0.85 and 1.15 mg/ft 2 of a third magenta dye; between about 17.39 and 23.00 mg/ft 2 of a cellulose acetate propionate; between about 4.81 and 6.36 mg/ft 2 of a plasticizer; between about 0.687 and 0.909 mg/ft 2 of spacer beads; and wherein the first magenta dye has a structure of:

the second magenta dye has a structure of:

and the third magenta dye has a structure of:

10 . The magenta donor of claim 9 , wherein the solvent mixture includes a composition of approximately 79% toluene, approximately 20% methanol, and approximately 1% cyclopentanone.

11 . The magenta donor of claim 9 , wherein the magenta donor is applied as a single laydown onto a print medium with a thickness of between about 0.25 and 0.74 microns.

12 . The magenta donor of claim 9 , wherein the cellulose acetate includes approximately 48% propionyl by weight, 1.7% hydroxyl by weight, and 1.3% acetyl by weight.

13 . The magenta donor of claim 9 , wherein the plasticizer is Paraplex G-25.

14 . The magenta donor of claim 9 , wherein the spacer beads comprise resin particles.

15 . The magenta donor of claim 12 , wherein the resin particles have an average particle diameter between about 0.5-6 microns.

16 . The magenta donor of claim 12 , wherein the resin particles have an average particle diameter between about 0.5-3.05 microns.

17 . A red color representation, comprising:
a combination of a magenta donor and a yellow donor, wherein the magenta donor has a vividness of up to 88 linear CIELAB units and a hue sector gamut of up to 185,738 cubic CIELAB units and the red color has a vividness of up to 91 linear CIELAB units, and wherein the yellow donor comprises: a solvent mixture of toluene, methanol, and cyclopentanone; between about 12.40 and 16.40 mg/ft 2 of a first yellow dye; between about 3.67 and 4.85 mg/ft 2 of a second yellow dye; between about 1.74 and 2.30 mg/ft 2 of a third yellow dye; between about 16.57 and 21.92 mg/ft 2 of a cellulose acetate propionate; between about 2.61 and 3.45 mg/ft 2 of a plasticizer; between about 0.296 and 0.391 mg/ft 2 of spacer beads; and wherein the first yellow dye has a structure of:

the second yellow dye has a structure of:

and the third yellow dye has a structure of:

18 . The red color representation of claim 17 , wherein the magenta donor comprises:
a solvent mixture of toluene, methanol, and cyclopentanone; between about 7.83 and 10.35 mg/ft 2 of a first magenta dye; between about 7.83 and 10.35 mg/ft 2 of a second magenta dye; between about 0.85 and 1.15 mg/ft 2 of a third magenta dye; between about 17.39 and 23.00 mg/ft 2 of a cellulose acetate propionate; between about 4.81 and 6.36 mg/ft 2 of a plasticizer; between about 0.687 and 0.909 mg/ft 2 of spacer beads; and wherein the first magenta dye has a structure of:

the second magenta dye has a structure of:

and the third magenta dye has a structure of:

19 . The red color representation of claim 17 , wherein the red color representation is provided as colored material to a receiver element for deposition onto a surface.

Assignees

• Kodak Alaris Inc
• Kodak Alaris Llc

Inventors

• Foster David G
• Reiman Donald M
• Pylypciw Jacob
• Schild Michael H

Classifications

• B41M5/395

  Macromolecular additives, e.g. binders · CPC title

• B41M5/392

  Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents · CPC title

• B41M5/39

  Dyes containing one or more carbon-to-nitrogen double bonds, e.g. azomethine · CPC title

• B41M5/388

  Azo dyes · CPC title

• B41M5/3854

  Dyes containing one or more acyclic carbon-to-carbon double bonds, e.g., di- or tri-cyanovinyl, methine · CPC title