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CN110669360A - Composite color pigment flake and preparation method thereof - Google Patents

Composite color pigment flake and preparation method thereof Download PDF

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Publication number
CN110669360A
CN110669360A CN201910817314.3A CN201910817314A CN110669360A CN 110669360 A CN110669360 A CN 110669360A CN 201910817314 A CN201910817314 A CN 201910817314A CN 110669360 A CN110669360 A CN 110669360A
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China
Prior art keywords
layer
dielectric layer
oxide
metal layer
pigment flake
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Pending
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CN201910817314.3A
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Chinese (zh)
Inventor
孙倩云
陈龙
陈章荣
潘硕
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HUIZHOU FORYOU OPTICAL TECHNOLOGY Co Ltd
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HUIZHOU FORYOU OPTICAL TECHNOLOGY Co Ltd
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Priority to CN201910817314.3A priority Critical patent/CN110669360A/en
Publication of CN110669360A publication Critical patent/CN110669360A/en
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/62—Metallic pigments or fillers
    • C09C1/64—Aluminium

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

The application provides a composite color pigment flake and a preparation method thereof, wherein the pigment flake comprises a metal layer, a first dielectric layer and a second dielectric layer which are sequentially stacked on a first main surface of the metal layer, and a third dielectric layer and a fourth dielectric layer which are further sequentially stacked on a second main surface opposite to the first main surface of the metal layer. Therefore, the composite color pigment flake can realize the multicolor composite color development effect through the stacking of a plurality of film layers, and has the semitransparent color development effect at the same time.

Description

Composite color pigment flake and preparation method thereof
Technical Field
The application relates to the field of pigment flakes, in particular to a composite color pigment flake and a preparation method thereof.
Background
The optical color-changing pigment is a high-end anti-counterfeiting pigment which is attracted to the market in recent years, and consists of fragments of optical color-changing films with specific spectral characteristics, but the optical color-changing pigment is not greatly reformed in the present year, and although the structure of the common pigment is as follows: the absorption layer/the dielectric layer/the reflection layer can realize the light variation effect, but the color development effect is single, and the material used by the absorption layer is not environment-friendly enough.
Disclosure of Invention
The application provides a composite color pigment flake and a preparation method thereof, which are used for solving the problems of single color development effect of the pigment and insufficient environmental protection of the used materials in the prior art.
In order to solve the technical problem, the application adopts a technical scheme that: the composite color pigment flake comprises a metal layer, a first dielectric layer and a second dielectric layer which are sequentially stacked and arranged on a first main surface of the metal layer, wherein the second main surface of the metal layer is further sequentially stacked and provided with a third dielectric layer and a fourth dielectric layer, and the second main surface is arranged opposite to the first main surface.
According to a specific embodiment of the present application, the material of the metal layer is at least one of metal aluminum, silver, gold, copper, platinum, tin, titanium, palladium, rhodium, niobium, and chromium, and an alloy thereof.
According to a specific embodiment of the present application, the metal layer is made of silver, a first adhesive layer is disposed on the first main surface of the metal layer, a second adhesive layer is disposed on the second main surface of the metal layer, and the first adhesive layer and the second adhesive layer are symmetrically disposed with respect to the metal layer.
According to a specific embodiment of the present application, the material of the adhesion layer is at least one of titanium, chromium, SIO, and ITO.
According to a specific embodiment of the present application, the metal layer has a physical thickness of 5nm to 40 nm.
According to an embodiment of the present application, the metal layer is made of a magnetic material.
According to a specific embodiment of the present application, the material of the metal layer is at least one of iron, cobalt, nickel, gadolinium, terbium, dysprosium, and erbium, or an oxide thereof and an alloy thereof; or the material of the metal layer is at least one of iron/silicon alloy, iron/nickel alloy, iron/aluminum, iron/cobalt alloy, iron/silicon/aluminum alloy and iron/nickel/molybdenum alloy.
According to an embodiment of the present application, the metal layer has a physical thickness of 5nm to 100 nm.
According to a specific embodiment of the present application, the first dielectric layer and the third dielectric layer are made of dielectric materials with refractive indexes less than or equal to 1.65.
According to an embodiment of the present application, the material of the first dielectric layer and the third dielectric layer includes at least one of silicon dioxide, aluminum oxide, magnesium fluoride, aluminum fluoride, cerium fluoride, lanthanum fluoride, neodymium fluoride, samarium fluoride, barium fluoride, calcium fluoride, and lithium fluoride.
According to an embodiment of the present application, the physical thickness of the first dielectric layer and the third dielectric layer is 50-200 nm.
According to a specific embodiment of the present application, the second dielectric layer and the fourth dielectric layer are made of dielectric materials with refractive indexes larger than 1.65.
According to a specific embodiment of the present application, the material of the second dielectric layer and the fourth dielectric layer includes at least one of lanthanum titanate, titanium pentoxide, niobium pentoxide, zinc sulfide, zinc oxide, zirconium oxide, titanium dioxide, carbon, indium oxide, indium tin oxide, tantalum pentoxide, cerium oxide, yttrium oxide, europium oxide, iron oxide, triiron tetroxide, hafnium nitride, hafnium carbide, hafnium oxide, lanthanum oxide, magnesium oxide, neodymium oxide, praseodymium oxide, samarium oxide, antimony trioxide, silicon carbide, silicon nitride, silicon monoxide, selenium trioxide, tin oxide, and tungsten trioxide.
According to an embodiment of the present application, the physical thickness of the second dielectric layer and the fourth dielectric layer is 20-100 nm.
Another technical scheme adopted by the application is as follows: a method of making composite-color pigment flakes is provided, comprising: providing a substrate layer; forming an isolation layer on the base layer; depositing a fourth dielectric layer, a third dielectric layer, a metal layer, a second dielectric layer and a first dielectric layer on the isolation layer in sequence; separating the membrane layer assembly on the spacer layer from the substrate layer; the film layer combination is crushed to form pigment flakes.
The beneficial effect of this application is: different from the situation of the related technology, the composite color pigment flake comprises a metal layer, a first dielectric layer and a second dielectric layer which are sequentially stacked and arranged on a first main surface of the metal layer, wherein a third dielectric layer and a fourth dielectric layer are further sequentially stacked and arranged on a second main surface of the metal layer, and the second main surface is opposite to the first main surface. Therefore, the composite color pigment flake can realize the multicolor composite color development effect through the stacking of a plurality of film layers, and has the semitransparent color development effect at the same time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic structural view of one embodiment of a composite color pigment flake according to the present application;
fig. 2 is a schematic structural view of another embodiment of a composite color pigment flake according to the present application;
fig. 3 is a schematic flow chart diagram of one embodiment of a method of making composite color pigment flakes according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In the conventional art, some companies produce optically variable pigments having a structure of: the color developing effect is single, and the material used for the absorption layer is not environment-friendly.
To solve the above problems, embodiments of the present application provide a composite color pigment flake, and referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of the composite color pigment flake of the present application. The composite color pigment flake comprises a metal layer 100, and a first dielectric layer 110 and a second dielectric layer 120 which are sequentially stacked and arranged on a first main surface of the metal layer 100, wherein a third dielectric layer 130 and a fourth dielectric layer 140 are further sequentially stacked and arranged on a second main surface of the metal layer 100, and the second main surface is opposite to the first main surface.
Different from the related art, the composite color pigment flake of the embodiment has a metal layer 100, a first dielectric layer 110 and a second dielectric layer 120 are sequentially stacked on a first main surface of the metal layer 100, and a third dielectric layer 130 and a fourth dielectric layer 140 are sequentially stacked on the first main surface of the metal layer 100; through the stacking of the multiple film layers, the multicolor composite color development effect is realized, and the semitransparent color development effect is achieved.
Referring to fig. 1, in the present embodiment, the material of the metal layer 100 may be at least one of metal aluminum, silver, gold, copper, platinum, tin, titanium, palladium, rhodium, niobium, and chromium, and an alloy thereof; the material of the metal layer 100 may be a material composed of the above simple substances, for example, the material of the metal layer 100 is composed of metallic aluminum, and the metal layer 100 may also be formed by mixing the above metallic materials to form an alloy, for example, silver-aluminum alloy.
Referring to fig. 2, fig. 2 is a schematic structural view of another embodiment of the composite color pigment flake according to the present application. The metal layer 100 is made of silver, a first adhesive layer 101 is disposed on a first main surface of the metal layer 100, a second adhesive layer 102 is disposed on a second main surface of the metal layer 100, and the first adhesive layer 101 and the second adhesive layer 102 are symmetrically disposed with respect to the metal layer 100.
When the metal layer 100 is made of silver, an adhesive layer is disposed between the metal layer 100 and the dielectric layer in order to further enhance the bonding between the metal layer 100 and the dielectric layer and reduce the delamination phenomenon. Specifically, the metal layer 100 is disposed between the first adhesive layer 101 and the second adhesive layer 102, the first dielectric layer 110 and the second dielectric layer 120 are sequentially stacked on the first adhesive layer 101, and the third dielectric layer 130 and the fourth dielectric layer 140 are sequentially stacked on the second adhesive layer 102, thereby constituting a seven-layer structure.
The first bonding layer 101 and the second bonding layer 102 are made of at least one of titanium, chromium, SIO and ITO; that is, the material of the first adhesive layer 101 and the second adhesive layer 102 may be the above-mentioned simple substance material or a mixture or an alloy composed of a mixture of the above-mentioned simple substance materials.
Specifically, the physical thickness of the metal layer 100 is between 5nm and 40nm, for example, the physical thickness of the metal layer 100 may be 5nm, 7nm, 10nm, 15nm, 20.5nm, 29nm, 40nm, or the like.
Optionally, in other embodiments, the material of the metal layer 100 may also be a magnetic material, for example, the material of the metal layer 100 may also be at least one of iron, cobalt, nickel, gadolinium, terbium, dysprosium, and erbium, or an oxide thereof and an alloy thereof; alternatively, the material of the metal layer 100 is at least one of an iron/silicon alloy, an iron/nickel alloy, an iron/aluminum, an iron/cobalt alloy, an iron/silicon/aluminum alloy, and an iron/nickel/molybdenum alloy. That is, the material of the metal layer 100 may be one of the above-mentioned simple substance materials, may be an oxide of the above-mentioned simple substance material, or may be an alloy or a mixture material composed of at least two of the above-mentioned materials.
The physical thickness of the metal layer 100 is between 5nm and 100nm, and the physical thickness of the metal layer 100 may be 5nm, 7nm, 10nm, 20nm, 30.5nm, 50nm, 99nm, 100nm, or the like.
Different from the conventional technology, the metal layer 100 of the composite color pigment flake in the embodiment realizes a multicolor composite color development effect through the stacking of a plurality of film layers, and the metal layer 100 uses different materials to realize a multicolor composite magnetic optically variable pigment effect; in addition, by adjusting the thicknesses and material compositions of the metal layer 100, the first dielectric layer 110, the second dielectric layer 120, the third dielectric layer 130 and the fourth dielectric layer 140, a multi-color composite display effect is realized, and simultaneously, the ultraviolet and infrared high-reflection effect is achieved, so that the anti-aging and heat insulation functions are realized.
Optionally, dielectric materials with refractive index less than or equal to 1.65 are used for the first dielectric layer 110 and the third dielectric layer 130.
Specifically, the first dielectric layer 110 and the third dielectric layer 130 include at least one of silicon dioxide, aluminum oxide, magnesium fluoride, aluminum fluoride, cerium fluoride, lanthanum fluoride, neodymium fluoride, samarium fluoride, barium fluoride, calcium fluoride, and lithium fluoride. That is, the material of the first dielectric layer 110 and the third dielectric layer 130 may be one of the above materials, or a mixture material composed of at least two of the above materials.
Specifically, the physical thickness of the first dielectric layer 110 and the third dielectric layer 130 is between 50nm and 200nm, and the physical thickness of the first dielectric layer 110 and the third dielectric layer 130 may be 50nm, 55nm, 70nm, 100nm, 105nm, 150.5nm, 199nm, 200nm, or the like.
Optionally, dielectric materials with refractive indexes larger than 1.65 are used for the second dielectric layer 120 and the fourth dielectric layer 140.
Specifically, the material of the second dielectric layer 120 and the fourth dielectric layer 140 includes at least one of lanthanum titanate, trititanium pentoxide, niobium pentoxide, zinc sulfide, zinc oxide, zirconium oxide, titanium dioxide, carbon, indium oxide, indium tin oxide, tantalum pentoxide, cerium oxide, yttrium oxide, europium oxide, iron oxide, triiron tetroxide, hafnium nitride, hafnium carbide, hafnium oxide, lanthanum oxide, magnesium oxide, neodymium oxide, praseodymium oxide, samarium oxide, antimony trioxide, silicon carbide, silicon nitride, silicon monoxide, selenium trioxide, tin oxide, and tungsten trioxide. That is, the second dielectric layer 120 and the fourth dielectric layer 140 may be one of the above materials, or a mixture material of at least two of the above materials.
Specifically, the physical thickness of the second dielectric layer 120 and the fourth dielectric layer 140 is between 20nm and 100nm, for example, the physical thickness of the second dielectric layer 120 and the fourth dielectric layer 140 may be 20nm, 25nm, 50.5nm, 70nm, 85nm, 99nm, 100nm, or the like.
Optionally, the first dielectric layer 110 and the third dielectric layer 130 may have the same dielectric structure, and the second dielectric layer 120 and the fourth dielectric layer 140 may have the same dielectric structure, so that the first dielectric layer 110, the second dielectric layer 120, the third dielectric layer 130 and the fourth dielectric layer 140 may form a symmetrical structure with the metal layer 100 as a symmetrical center.
First dielectric layer 110, second dielectric layer 120, third dielectric layer 130, and fourth dielectric layer 140 may protect metal layer 100, and improve the overall durability of the composite color pigment flake.
Optionally, in other embodiments, first dielectric layer 110 and third dielectric layer 130 may be different dielectric structures, and second dielectric layer 120 and fourth dielectric layer 140 may be different dielectric structures.
Referring to fig. 3, fig. 3 is a schematic flow chart of an embodiment of a method for making composite-color pigment flakes according to the present application. The method for preparing the composite color pigment flakes is used for preparing the composite color pigment flakes of the above embodiments, and comprises the following specific steps:
s201: providing a substrate layer;
in particular, the substrate layer may be a rigid substrate, for example, the material of the substrate layer may be quartz glass.
S202: forming an isolation layer on the base layer;
s203: depositing a fourth dielectric layer 140, a third dielectric layer 130, a metal layer 100, a second dielectric layer 120 and a first dielectric layer 110 on the isolation layer in sequence;
specifically, on the rigid substrate, the isolation layer, the fourth dielectric layer 140, the third dielectric layer 130, the metal layer 100, the second dielectric layer 120, and the first dielectric layer 110 are used as a period; repeated evaporation is carried out for 20 to 30 times or more, so that the effective production time can be ensured to the maximum extent, the productivity of equipment can be improved, the production cost is reduced, and the survival efficiency can be improved.
Or, if the metal layer 100 is made of silver, an isolation layer, a fourth dielectric layer 140, a third dielectric layer 130, a second adhesive layer 102, a metal layer 100, a first adhesive layer 101, a second dielectric layer 120, and a first dielectric layer 110 are sequentially deposited on the isolation layer.
S204: separating the membrane layer assembly on the spacer layer from the substrate layer;
s205: the film layer combination is crushed to form pigment flakes.
The above description is only for the purpose of illustrating embodiments of the present invention and is not intended to limit the scope of the present invention, and all modifications, equivalents, and equivalent structures or equivalent processes that can be used directly or indirectly in other related fields of technology shall be encompassed by the present invention.

Claims (15)

1. The composite color pigment flake is characterized by comprising a metal layer, a first dielectric layer and a second dielectric layer which are sequentially stacked and arranged on a first main surface of the metal layer, wherein the second main surface of the metal layer is further sequentially stacked and provided with a third dielectric layer and a fourth dielectric layer, and the second main surface is arranged opposite to the first main surface.
2. The pigment flake of claim 1, wherein the metallic layer comprises a material selected from the group consisting of aluminum, silver, gold, copper, platinum, tin, titanium, palladium, rhodium, niobium, and chromium, and alloys thereof.
3. The pigment flake of claim 2, wherein the metal layer comprises silver, and wherein the first major surface of the metal layer comprises a first adhesion layer and the second major surface comprises a second adhesion layer, and wherein the first adhesion layer and the second adhesion layer are symmetrically disposed with respect to the metal layer.
4. The pigment flake of claim 3, wherein the first and second adhesion layers are at least one of titanium, chromium, SIO, and ITO.
5. The pigment flake of claim 2, wherein the metal layer has a physical thickness of from about 5nm to about 40 nm.
6. The pigment flake of claim 1, wherein the metal layer comprises a magnetic material.
7. The pigment flake of claim 6, wherein the metal layer comprises at least one of iron, cobalt, nickel, gadolinium, terbium, dysprosium, and erbium, oxides thereof, and alloys thereof; or the metal layer is made of at least one of iron/silicon alloy, iron/nickel alloy, iron/aluminum, iron/cobalt alloy, iron/silicon/aluminum alloy and iron/nickel/molybdenum alloy.
8. The pigment flake of claim 7, wherein the metal layer has a physical thickness of from about 5nm to about 100 nm.
9. The pigment flake of claim 1, wherein the first dielectric layer and the third dielectric layer are dielectric materials having an index of refraction of 1.65 or less.
10. The pigment flake of claim 1, wherein the first dielectric layer and the third dielectric layer comprise at least one of silicon dioxide, aluminum oxide, magnesium fluoride, aluminum fluoride, cerium fluoride, lanthanum fluoride, neodymium fluoride, samarium fluoride, barium fluoride, calcium fluoride, and lithium fluoride.
11. The pigment flake of claim 1, wherein the first dielectric layer and the third dielectric layer have a physical thickness of 50nm to 200 nm.
12. The pigment flake of claim 1, wherein the second dielectric layer and the fourth dielectric layer are dielectric materials having an index of refraction greater than 1.65.
13. The pigment flake of claim 1, wherein materials of the second dielectric layer and the fourth dielectric layer comprise at least one of lanthanum titanate, trititanium pentoxide, niobium pentoxide, zinc sulfide, zinc oxide, zirconium oxide, titanium dioxide, carbon, indium oxide, indium tin oxide, tantalum pentoxide, cerium oxide, yttrium oxide, europium oxide, iron oxide, triiron tetroxide, hafnium nitride, hafnium carbide, hafnium oxide, lanthanum oxide, magnesium oxide, neodymium oxide, praseodymium oxide, samarium oxide, antimony trioxide, silicon carbide, silicon nitride, silicon monoxide, selenium trioxide, tin oxide, and tungsten trioxide.
14. The pigment flake of claim 1, wherein the second dielectric layer and the fourth dielectric layer have a physical thickness of 20nm to 100 nm.
15. A method of making composite-color pigment flakes, comprising:
providing a substrate layer;
forming an isolation layer on the base layer;
depositing a fourth dielectric layer, a third dielectric layer, a metal layer, a second dielectric layer and a first dielectric layer on the isolation layer in sequence;
separating the film layer combination on the separation layer from the base layer;
and crushing the film layer combination to form the pigment flakes.
CN201910817314.3A 2019-08-30 2019-08-30 Composite color pigment flake and preparation method thereof Pending CN110669360A (en)

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN111534129A (en) * 2020-04-07 2020-08-14 惠州市华阳光学技术有限公司 Composite color pigment flake and preparation method thereof
CN111574860A (en) * 2020-06-17 2020-08-25 惠州市华阳光学技术有限公司 Metallic pigment flakes and metallic inks
CN112442287A (en) * 2020-11-20 2021-03-05 惠州市华阳光学技术有限公司 Pigment flakes and inks
CN112708288A (en) * 2020-05-21 2021-04-27 厦门大学 Magnetic structure color film
CN112987158A (en) * 2021-04-09 2021-06-18 广东晟铂纳新材料科技有限公司 Iron-based optically variable pigment and manufacturing method and application thereof
CN114806219A (en) * 2021-01-29 2022-07-29 惠州市华阳光学技术有限公司 Non-migration pigment and preparation method thereof
CN114815428A (en) * 2021-01-28 2022-07-29 惠州市华阳光学技术有限公司 Photochromic material
CN114891368A (en) * 2022-05-06 2022-08-12 惠州市华阳光学技术有限公司 Magnetic optically variable pigment

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CN1854204A (en) * 2001-04-27 2006-11-01 弗莱克斯产品公司 Multi-layered magnetic pigments and foils
CN105949822A (en) * 2016-04-27 2016-09-21 潮州三环（集团）股份有限公司 Golden ceramics and preparation method therefor
CN110204925A (en) * 2019-05-30 2019-09-06 惠州市华阳光学技术有限公司 A kind of high chroma magnetic pigment flakes and preparation method thereof

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CN1854204A (en) * 2001-04-27 2006-11-01 弗莱克斯产品公司 Multi-layered magnetic pigments and foils
CN1826387A (en) * 2003-06-17 2006-08-30 西巴特殊化学品控股有限公司 A process for the preparation of a pigment comprising a core material and at least one dielectric layer
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111534129A (en) * 2020-04-07 2020-08-14 惠州市华阳光学技术有限公司 Composite color pigment flake and preparation method thereof
CN112708288A (en) * 2020-05-21 2021-04-27 厦门大学 Magnetic structure color film
CN111574860A (en) * 2020-06-17 2020-08-25 惠州市华阳光学技术有限公司 Metallic pigment flakes and metallic inks
CN112442287A (en) * 2020-11-20 2021-03-05 惠州市华阳光学技术有限公司 Pigment flakes and inks
CN114815428A (en) * 2021-01-28 2022-07-29 惠州市华阳光学技术有限公司 Photochromic material
CN114815428B (en) * 2021-01-28 2024-04-26 惠州市华阳光学技术有限公司 Photochromic materials
CN114806219A (en) * 2021-01-29 2022-07-29 惠州市华阳光学技术有限公司 Non-migration pigment and preparation method thereof
CN112987158A (en) * 2021-04-09 2021-06-18 广东晟铂纳新材料科技有限公司 Iron-based optically variable pigment and manufacturing method and application thereof
CN112987158B (en) * 2021-04-09 2022-03-18 广东晟铂纳新材料科技有限公司 Iron-based optically variable pigment and manufacturing method and application thereof
CN114891368A (en) * 2022-05-06 2022-08-12 惠州市华阳光学技术有限公司 Magnetic optically variable pigment
CN114891368B (en) * 2022-05-06 2023-10-20 惠州市华阳光学技术有限公司 Magnetic optically variable pigment

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Application publication date: 20200110