US 6,644,799 B2 · Method of selecting ink jet inks and receiver in a color set and receiver combination

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 ⁢ ⁢ [LeftBracketingBar] Gloss ⁢ ⁢ ( Imaged ⁢ ⁢ Areas ) I - Gloss ⁢ ⁢ ( Non ⁢ - ⁢ Imaged ⁢ ⁢ Areas ) [RightBracketingBar] ∑ 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.

Claims28

Dependent claims

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

f) providing at least two color inks, each ink comprising a carrier and a pigment;
g) printing the above inks onto a set of receivers using test images consisting of single color patches of a Dmax density (100% dot coverage);
h) measuring the gloss level of each patch and the receiver at a predefined specular angle;
i) calculating the Relative Gloss Difference (RGD%) values of the ink set and receiver combination;
and
j) selecting the ink set and receiver combination such that RGD value is less than 40% when 60° is used as the specular angle, and the RGD value is calculated according to Equations (A):
RGD ⁢ ⁢ % = ∑ I = 1 N ⁢ ⁢ [LeftBracketingBar] Gloss ⁢ ⁢ ( Imaged ⁢ ⁢ Areas ) I - Gloss ⁢ ⁢ ( Non ⁢ - ⁢ Imaged ⁢ ⁢ Areas ) [RightBracketingBar] ∑ 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.

7 more elements

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

a) providing at least two color inks, each ink comprising a carrier and a pigment;
b) adjusting the sizes of the pigment particle of the inks to achieve the desired gloss;
c) printing the above inks onto a set of receivers using test images consisting of single color patches of a Dmax density (100% dot coverage);
d) measuring the gloss level of each patch and the receiver at a predefined specular angle;
e) calculating the Relative Gloss Difference (RGD) and Relative Gloss Variability (RGV) values of the ink set and receiver combination;
and
f) selecting the inks for the color set and receiver combination such that RGD value is less than 40% and RGV value among inks is less than 10% when 60° is used as the specular angle, and the RGD and RGV values are calculated according to Equations (A) and (B), respectively:
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 ⁢ ⁢ [LeftBracketingBar] ( Gloss ⁢ ⁢ ( Imaged ⁢ ⁢ Areas ) I - AG ) [RightBracketingBar] AG N Equation ⁢ ⁢ ( B )
where AG = ∑ I = 1 N ⁢ ⁢ Gloss ⁢ ⁢ ( Imaged ⁢ ⁢ Area ) I N
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.

8 more elements

Dependencies are inferred from the claim text.

Method of selecting ink jet inks and receiver in a color set and receiver combination

Life of this patent

Method of selecting ink jet inks and receiver in a color set and receiver combination

Life of this patent

Abstract

Claims28