Decorative member
A decorative member including: a color developing layer including a light reflective layer and a light absorbing layer provided on the light reflective layer; and a substrate provided on a surface of the color developing layer. The substrate comprises a pattern layer, and the light absorbing layer comprises silicon (Si).
1. A decorative member comprising:
a color developing layer comprising a light reflective layer and a light absorbing layer provided on the light reflective layer; and
a substrate provided on a surface of the color developing layer,
wherein the substrate comprises a pattern layer,
wherein the light absorbing layer comprises silicon (Si); and
wherein a warm tone parameter σ is represented by following Equation 1 and σ is greater than 0.7 and less than or equal to 1.4:
σ=( T x )×( T y ) [Equation 1]
wherein in Equation 1, T x is represented by Equation 2, and Ty is represented by Equation 3:
Tx
=
{
T
1
-
10
nm
+
T
0
-
[
T
1
-
10
nm
+
T
0
T
0
]
×
T
0
}
×
(
T
0
)
-
1
[
Equation
2
]
Ty
=
T
2
+
5
×
T
0
5
×
T
0
;
[
Equation
3
]
wherein in Equation 2,
[
T
1
-
10
nm
+
T
0
T
0
]
is a maximum integer that is not greater than
T
1
-
10
nm
+
T
0
T
0
,
and T 0 is 60 nm;
wherein when T 1 is not m*T 0 +10 nm, T x satisfies Equation 2, and when T 1 is m*T 0 +10 nm, Tx is 1;
wherein m is an integer of 1 or greater; and
wherein T 1 is an average thickness of a cross-section of the light absorbing layer in a thickness direction of the decorative member, and T 2 is an average thickness of a cross-section of the light reflective layer in a thickness direction of the decorative member.
2. The decorative member of claim 1 , wherein Tx is greater than 0.5 and less than or equal to 1.
3. The decorative member of claim 1 , wherein Ty is greater than 1.0 and less than or equal to 1.4.
4. The decorative member of claim 1 , wherein a hue-angle h* in CIE LCh color space of the light absorbing layer is in a range of 315° to 360° and 0° to 150°.
5. The decorative member of claim 1 , wherein the light reflective layer is a single layer or a multilayer including one or more materials selected from the group consisting of indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nd), iron (Fe), chromium (Cr), cobalt (Co), gold (Au), silver (Ag), oxides thereof, nitrides thereof, oxynitrides thereof carbon and carbon composites.
6. The decorative member of claim 1 , wherein the light absorbing layer has a refractive index of 0 to 8 at a wavelength of 400 nm.
7. The decorative member of claim 1 , wherein the light absorbing layer has an extinction coefficient greater than 0 and less than or equal to 4 at a wavelength of 400 nm.
8. The decorative member of claim 1 , wherein the light absorbing layer includes two or more points with different thicknesses.
9. The decorative member of claim 1 , wherein the color developing layer further comprises a color film.
10. The decorative member of claim 1 , wherein the pattern layer of the substrate is provided adjacent to the color developing layer.
11. The decorative member of claim 10 , wherein the pattern layer comprises a convex portion or a concave portion shape having an asymmetric-structured cross-section.
12. The decorative member of claim 1 , which has dichroism of ΔE*ab>1, wherein (ΔE*ab) is a distance in a L*a*b* space in a color coordinate CIE L*a*b*, L* is a distance from L axis and a* and b* are Cartesian coordinates.
13. The decorative member of claim 1 , wherein the substrate is a plastic injection molded article or a glass substrate for a cosmetic container.
14. The decorative member of claim 13 , wherein the plastic injection molded article comprises one or more materials selected from the group consisting of polypropylene (PP), polystyrene (PS), polyvinyl acetate (PVAc), polyacrylate, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), an ethylene-vinyl acetate copolymer (EVA), polycarbonate (PC), polyamide and a styrene-acrylonitrile copolymer (SAN).