Patent ID: 11952499
Assignee: HUBERGROUP ITALIA
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B  D | IPC B  C  D

Claim 0:
1. A system comprising:
a) at least one first colour layer (18) containing a dye (26) and/or pigment,
b) on the at least one first colour layer (18) an effect layer (20) containing at least one platelet-shaped effect pigment (28), wherein the at least one platelet-shaped effect pigment (28) is composed of particles (46) having an average length (48) of 2 to 500 μm, an average width (50) of 2 to 500 μm and an average thickness of at most 1 μm,
c) on the effect layer (20) at least one second colour layer (22) containing a dye (30) and/or pigment,
wherein each of the at least one first colour layer (18) and of the at least one second colour layer (22) contains a dye (26, 30) and/or pigment being no platelet-shaped effect pigment, wherein the at least one dye (26) and/or at least one pigment included in the at least one first colour layer (18) is different from the at least one dye (30) and/or at least one pigment included in the at least one second colour layer (22),
wherein, at least if the at least one first colour layer (18) has a sum of reflectance and scattering of less than 40%, the system further comprises:
d) below the at least one first colour layer (18) a lower layer (16) containing a pigment (24) and having a sum of reflectance and scattering of at least 40%,
wherein the system does not contain any interference pigment, wherein the interference pigment is defined to be a pigment which produces an interference of light waves, and
wherein the delta a/b is at least 15, wherein the delta a/b is determined according to the equation delta a/b=((a[15°]−a[110°])2+(b[15°]−b[110°])2)1/2, wherein a[15°] is the a-value measured at an observation value of 15°, a[110°] is the a-value measured at an observation value of 110°, b[15°] is the b-value measured at an observation value of 15° and b[110°] is the b-value measured at an observation value of 110°, wherein the measurement is performed by irradiating in a dark environment a standardized light type onto the system at an angle of incident of 45° with respect to the horizontal direction, wherein the angle of reflection of 135° with respect to the horizontal direction is defined as an observation angle of 0°.