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US 11,692,100 B2Granted
Interference pigment
AssigneeThe Swatch Group Research and Development Ltd
InventorsJean-Luc Bazin, Csilla Miko
Life of this patent
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Abstract
A multilayered interference pigment containing, in succession: a metal core in the form of a flake, the metal core containing a material selected from gold, silver, palladium, rhodium, ruthenium, platinum, osmium, iridium and an alloy thereof; a first layer of transparent dielectric material; and a second discontinuous metal layer making it possible to both reflect a portion of the light beam and to transmit another portion of this beam onto the metal core.
Claims12
A sintered multilayered interference pigment comprising in succession:
- a metal core comprising a material selected from the group consisting of gold, silver, palladium, rhodium, ruthenium, platinum, osmium, iridium, and alloys thereof;
- a first layer of transparent dielectric material;
- and
- a second discontinuous metal layer making it possible to both reflect a portion of a light beam and to transmit another portion of this beam onto the metal core,
- wherein the metal core is in the form of an elongated flake having an average transverse diameter D between 2 and 300 μm, an average thickness E between 20 and 1000 nm, and a form factor defined as the ratio of the average transverse diameter to the average thickness of between 5 and 1000 .
2 more elements
Dependencies are inferred from the claim text.