Pigment mixture
AssigneeMerck Patent GmbH
InventorsChristoph Schmidt, Carsten Plueg, Uwe Lenz, Sabine Schoen
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Abstract
A pigment mixture comprising at least two or three interference pigments of different interference colours selected from the colours red, green and blue, suitable for use in paints, coatings, printing inks, security printing inks, plastics, ceramic materials, glasses and in the preparation of pigment preparations, dry preparations and in particular cosmetic formulations.
Claims16
A pigment mixture comprising two or three interference pigments which each have different interference colours, where the interference colours are selected from the colours red, blue and green and the CIE Lab* colour ranges of the individual pigments are defined as follows:
- red interference pigment:
- a≥25 and b≥0
- blue interference pigment:
- −20≤a≤40 and b≤−50
- green interference pigment:
- a≤−15 and b≥0,
- wherein the interference pigments are based on flake-form substrates and wherein said pigment mixture are suitable for cosmetics,
- wherein the flake-form substrates are natural mica, synthetic mica, glass flakes, SiO2 flakes, Al2O3 flakes or mixtures thereof,
- wherein the interference pigments have a particle size of D50<25 μm, and
- wherein color intensity and hue of red/green/blue/gold of the pigment mixture is set solely by a mixing ratio of the two or three interference pigments.
A pigment mixture comprising
- two or three interference pigments which each have different interference colours, where the interference colours are selected from the colours red, blue and green and the CIE Lab* colour ranges of the individual pigments are defined as follows:
- red interference pigment:
- a≥25 and b≥0
- blue interference pigment:
- −20≤a≤40 and b≤−50
- green interference pigment:
- a≤−15 and b≥0
- wherein the interference pigments are based on flake-form substrates and are suitable for cosmetics,
- wherein the interference pigments are based on flake-form substrates,
- wherein the flake-form substrates are natural mica, synthetic mica, glass flakes, SiO2 flakes, Al2O3 flakes or mixtures thereof, and
- wherein the interference pigments have a particle size of D50<25 μm, and
- wherein color intensity and hue of red/green/blue/gold of the pigment mixture is set solely by a mixing ratio of the two or three interference pigments.
A pigment mixture comprising two or three interference pigments which each have different interference colours, where the interference colours are selected from the colours red, blue and green and the CIE Lab* colour ranges of the individual pigments are defined as follows:
- red interference pigment:
- a≥25 and b≥0
- blue interference pigment:
- −20≤a≤40 and b≤−50
- green interference pigment:
- a≤−15 and b≥0 and
- wherein the interference pigments are based on flake-form substrates and have a particle size distribution, determined in accordance with Malvern, Mastersizer 2000, of D10=<12 μm, D50=<25 μm, D90=<45 μm, and
- wherein color intensity and hue of red/green/blue/gold of the pigment mixture is set solely by a mixing ratio of the two or three interference pigments.
Dependencies are inferred from the claim text.