WO2023222572A1 - Paper sheet material with a glittering and reflective surface appearance - Google Patents
Paper sheet material with a glittering and reflective surface appearance Download PDFInfo
- Publication number
- WO2023222572A1 WO2023222572A1 PCT/EP2023/062904 EP2023062904W WO2023222572A1 WO 2023222572 A1 WO2023222572 A1 WO 2023222572A1 EP 2023062904 W EP2023062904 W EP 2023062904W WO 2023222572 A1 WO2023222572 A1 WO 2023222572A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet material
- weight
- paper sheet
- treatment layer
- glittering
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 239000006185 dispersion Substances 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims abstract description 17
- 238000011282 treatment Methods 0.000 claims abstract description 16
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 13
- 239000008187 granular material Substances 0.000 claims abstract description 12
- 239000010445 mica Substances 0.000 claims abstract description 12
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 12
- 239000002335 surface treatment layer Substances 0.000 claims abstract description 3
- 239000004816 latex Substances 0.000 claims description 8
- 229920000126 latex Polymers 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000002174 Styrene-butadiene Substances 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 4
- 239000011115 styrene butadiene Substances 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 4
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- YIXSKDRXJTZCHT-UHFFFAOYSA-N 2-acetylbutanedioic acid Chemical compound CC(=O)C(C(O)=O)CC(O)=O YIXSKDRXJTZCHT-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- -1 alkyl ketene dimer Chemical compound 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/57—Polyureas; Polyurethanes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
Definitions
- the present invention relates to a paper sheet material with a glittering and reflective surface appearance and to the method for the production thereof.
- dispersions in which the dispersed phase consists of mica granules of varying dimensions and the dispersing phase consists of suitable natural and/or synthetic binders.
- Such surface treatments in addition to risking impairing printability, may pose other drawbacks, including the not always adequate effectiveness of the binders used, which may lead to defects in the finished product, such as, for example, a certain non-uniformity in the surface appearance imparted.
- the technical task of the present invention is thus to provide a paper sheet material with a glittering and reflective surface appearance and a method for the production thereof that enables the aforesaid technical drawbacks of the prior art to be overcome.
- one object of the invention is to provide a paper sheet material with a glittering and reflective surface appearance with adequate suitability for being printed on.
- Another object of the invention is to provide a paper sheet material with a glittering and reflective surface appearance that is uniform and lasts over time.
- Yet a further object of the invention is to provide a paper sheet material with a glittering and reflective surface appearance that may be produced in a simple and repeatable manner using well-established techniques.
- a paper sheet material comprising a paper substrate and a treatment layer applied to at least one surface of said paper substrate to impart a glittering and reflective appearance to said surface, said surface treatment layer being characterised in that it is formed from a dispersion including a dispersed phase comprising mica granules and a transparent binding dispersing phase comprising a polyurethane resin.
- the invention also discloses a process for manufacturing a paper sheet material, characterised by making a paper substrate by means of a continuous paper manufacturing machine, and applying a treatment layer to at least one surface of said paper substrate to impart a glittering and reflective appearance to said surface of said paper substrate, wherein said treatment layer includes a dispersion including a dispersed phase comprising mica granules and a transparent binding dispersing phase comprising a polyurethane resin.
- the treatment layer may obviously be applied to only one or also both main surfaces of the paper sheet material.
- the treatment layer may optionally be formed by a coating.
- One of the most advantageous aspects of the invention consists in the reliance on a polyurethane resin to be used as a binder in the dispersing phase of the dispersion.
- the use of the polyurethane resin has surprisingly been found to be particularly suitable due to the fact that it performs a closure action on the treated surface, which is thus more homogeneous and consequently more suitable for the application of homogeneous layers of printing inks and, at the same time, due to the fact that it increases the binding power over the mica granules and consequently improves the quality and durability of the surface treatment.
- the binding dispersing phase of the dispersion can advantageously further comprise at least one synthetic styrene acrylic and/or styrene butadiene latex.
- the mica granules in the dispersed phase of the dispersion have dimensions comprised between 2 and 300 pm.
- mica granules of large dimensions particularly comprised between 150 and 300 pm, also improves the glittering and reflective effect without impairing printability.
- the dispersion preferably has between 5 and 50% by weight of the dispersed phase.
- the dispersed phase can be devoid of pigments or include coloured pigments and/or kaolin in addition to the mica granules.
- the treatment layer has a grammage comprised between 5 and 15 g/m 2 , preferably comprised between 8 and 10 g/m 2 .
- the treatment layer further has a viscosity comprised between 120 and 400 cP at 6 RPM, preferably comprised between 150 and 350 cP at 6 RPM.
- the treatment layer is applied in an amount comprised between 1 and 5 % by weight of the paper material.
- the paper substrate comprises cellulose fibres, at least one polymeric substance, suitable for imparting mechanical strength to the cellulose fibres (dry and wet), and an inorganic filler, suitable for imparting good characteristics of machinability and chemical stability to the material.
- the polymeric substance included in the paper substrate comprises one or more resins based on colophony and/or an alkyl ketene dimer and/or acetyl succinic acid and/or epichlorohydrin and/or carboxymethylcellulose.
- the inorganic filler is a mineral filler comprising one or more substances selected in the group consisting of carbonates, kaolins, talc, and mixtures thereof.
- the process for manufacturing the aforesaid paper sheet material comprises making a paper substrate by means of a continuous paper manufacturing machine, and applying the treatment layer to at least one surface of the paper substrate to impart thereto a glittering and reflective appearance.
- the paper sheet substrate can be subjected to heating in an infrared or hot air oven.
- -treatment layer in the form of a coating 5% by weight of which the paper substrate is of a type and composition known in the prior art, whereas the coating has the composition shown below.
- Dispersing phase 90% by weight of the dispersion, of which -polyurethane resin: 20% by weight
- Dispersed phase 10% by weight of the dispersion, of which
- -treatment layer in the form of a coating: 2% by weight of which the paper substrate is of a type and composition known in the prior art, whereas the coating has the composition shown below.
- Dispersing phase 60% by weight of the dispersion, of which
- Dispersed phase 40% by weight of the dispersion, of which
Abstract
The paper sheet material comprises a paper substrate, and a treatment layer applied to at least one surface of said paper substrate to impart a glittering and reflective appearance to said surface, said surface treatment layer being characterised in that it is formed from a dispersion including a dispersed phase comprising mica granules and a transparent binding dispersing phase comprising a polyurethane resin.
Description
PAPER SHEET MATERIAL WITH A GLITTERING AND REFLECTIVE SURFACE
APPEARANCE
DESCRIPTION
The present invention relates to a paper sheet material with a glittering and reflective surface appearance and to the method for the production thereof.
Numerous types of paper having a glittering and reflective surface effect have been present on the market for some time.
Such papers have application, for example, in the packaging industry and in the advertising industry.
One of the greatest drawbacks tied to the use of these papers is represented by their not always adequate suitability for being printed on, precisely because of the surface treatments to which they are subjected in order to obtain the desired glittering and reflective effect.
Among the surface treatments adopted, there are those based on dispersions in which the dispersed phase consists of mica granules of varying dimensions and the dispersing phase consists of suitable natural and/or synthetic binders.
Such surface treatments, in addition to risking impairing printability, may pose other drawbacks, including the not always adequate effectiveness of the binders used, which may lead to defects in the finished product, such as, for example, a certain non-uniformity in the surface appearance imparted.
The technical task of the present invention is thus to provide a paper sheet material with a glittering and reflective surface appearance and a method for the production thereof that enables the aforesaid technical drawbacks of the prior art to be overcome.
Within the scope of this technical task, one object of the invention is to provide a paper sheet material with a glittering and reflective surface appearance with adequate suitability for being
printed on.
Another object of the invention is to provide a paper sheet material with a glittering and reflective surface appearance that is uniform and lasts over time.
Yet a further object of the invention is to provide a paper sheet material with a glittering and reflective surface appearance that may be produced in a simple and repeatable manner using well-established techniques.
The technical task, as well as these and other objects, are achieved according to the present invention by providing a paper sheet material comprising a paper substrate and a treatment layer applied to at least one surface of said paper substrate to impart a glittering and reflective appearance to said surface, said surface treatment layer being characterised in that it is formed from a dispersion including a dispersed phase comprising mica granules and a transparent binding dispersing phase comprising a polyurethane resin.
The invention also discloses a process for manufacturing a paper sheet material, characterised by making a paper substrate by means of a continuous paper manufacturing machine, and applying a treatment layer to at least one surface of said paper substrate to impart a glittering and reflective appearance to said surface of said paper substrate, wherein said treatment layer includes a dispersion including a dispersed phase comprising mica granules and a transparent binding dispersing phase comprising a polyurethane resin.
Other features of the present invention are defined, moreover, in the subsequent claims.
The treatment layer may obviously be applied to only one or also both main surfaces of the paper sheet material.
The treatment layer may optionally be formed by a coating.
One of the most advantageous aspects of the invention consists in the reliance on a polyurethane resin to be used as a binder in the dispersing phase of the dispersion.
The use of the polyurethane resin has surprisingly been found to be particularly suitable due to the fact that it performs a closure action on the treated surface, which is thus more homogeneous and consequently more suitable for the application of homogeneous layers of printing inks and, at the same time, due to the fact that it increases the binding power over the mica granules and consequently improves the quality and durability of the surface treatment.
The binding dispersing phase of the dispersion can advantageously further comprise at least one synthetic styrene acrylic and/or styrene butadiene latex.
It has been found that the use, in the dispersing phase of the dispersion, of a number comprised between 2 and 4 parts by weight of the synthetic latex for every part by weight of the polyurethane resin optimises the binding effect.
The mica granules in the dispersed phase of the dispersion have dimensions comprised between 2 and 300 pm.
It has surprisingly been found that the use of mica granules of large dimensions, particularly comprised between 150 and 300 pm, also improves the glittering and reflective effect without impairing printability.
The dispersion preferably has between 5 and 50% by weight of the dispersed phase.
The dispersed phase can be devoid of pigments or include coloured pigments and/or kaolin in addition to the mica granules.
The treatment layer has a grammage comprised between 5 and 15 g/m2, preferably comprised between 8 and 10 g/m2.
The treatment layer further has a viscosity comprised between 120 and 400 cP at 6 RPM, preferably comprised between 150 and 350 cP at 6 RPM.
The treatment layer is applied in an amount comprised between 1 and 5 % by weight of the paper material.
The paper substrate comprises cellulose fibres, at least one polymeric substance, suitable for imparting mechanical strength to the cellulose fibres (dry and wet), and an inorganic filler, suitable for imparting good characteristics of machinability and chemical stability to the material.
Preferably, the polymeric substance included in the paper substrate comprises one or more resins based on colophony and/or an alkyl ketene dimer and/or acetyl succinic acid and/or epichlorohydrin and/or carboxymethylcellulose.
Preferably, the inorganic filler is a mineral filler comprising one or more substances selected in the group consisting of carbonates, kaolins, talc, and mixtures thereof.
The process for manufacturing the aforesaid paper sheet material comprises making a paper substrate by means of a continuous paper manufacturing machine, and applying the treatment layer to at least one surface of the paper substrate to impart thereto a glittering and reflective appearance.
In order to favour the polymerisation of the polyurethane resin, the paper sheet substrate can be subjected to heating in an infrared or hot air oven.
Two possible compositions of the paper sheet material are shown below by way of example.
EXAMPLE 1
Paper sheet material
-paper substrate: 95% by weight
-treatment layer in the form of a coating: 5% by weight of which the paper substrate is of a type and composition known in the prior art, whereas the coating has the composition shown below.
Coating
Dispersing phase: 90% by weight of the dispersion, of which
-polyurethane resin: 20% by weight
-synthetic styrene acrylic latex: 70%
-additives: 10%
Dispersed phase: 10% by weight of the dispersion, of which
-mica granules: 100% by weight
EXAMPLE 2
Paper sheet material
-paper substrate: 98% by weight
-treatment layer in the form of a coating: 2% by weight of which the paper substrate is of a type and composition known in the prior art, whereas the coating has the composition shown below.
Coating
Dispersing phase: 60% by weight of the dispersion, of which
-polyurethane resin: 30% by weight
-synthetic styrene butadiene latex: 60%
-additives: 10%
Dispersed phase: 40% by weight of the dispersion, of which
-mica granules: 75% by weight
- coloured pigments and kaolin: 25% by weight
The paper sheet material with a glittering and reflective surface appearance thus conceived is susceptible of numerous modifications and variants, all falling within the scope of the inventive concept; furthermore, all the details may be replaced by technically equivalent elements.
The materials used, as well as the dimensions, may in practice be any whatsoever according to needs and the state of the art.
Claims
CLAIMS A paper sheet material comprising a paper substrate and a treatment layer applied to at least one surface of said paper substrate to impart a glittering and reflective appearance to said surface, said surface treatment layer being characterised in that it is formed from a dispersion including a dispersed phase of between 5 and 50% by weight comprising mica granules having dimensions comprised between 2 and 300 pm, preferably between 150 and 300 pm, and a transparent binding dispersing phase comprising a polyurethane resin and at least one synthetic styrene acrylic and/or styrene butadiene latex, said dispersing phase of said dispersion having from 2 to 4 parts by weight of said synthetic latex for every part by weight of said polyurethane resin. The paper sheet material according to the preceding claim, characterised in that said dispersed phase also includes coloured pigments and/or kaolin. The paper sheet material according to any preceding claim, characterised in that said treatment layer has a grammage comprised between 5 and 15 g/m2. A process for manufacturing a paper sheet material, characterised by making a paper substrate by means of a continuous paper manufacturing machine, and applying a treatment layer to at least one surface of said paper substrate to impart a glittering and reflective appearance to said surface of said paper substrate, wherein said treatment layer includes a dispersion including a dispersed phase of between 5 and 50% by weight comprising mica granules having dimensions comprised between 2 and 300 m, preferably between 150 and 300 pm, and a transparent binding dispersing phase comprising a polyurethane resin and at least one synthetic styrene acrylic and/or styrene butadiene latex, said dispersing phase of said dispersion having from 2 to 4 parts by weight of said synthetic latex for every part by weight of said polyurethane resin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT202200010124 | 2022-05-16 | ||
| IT102022000010124 | 2022-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023222572A1 true WO2023222572A1 (en) | 2023-11-23 |
Family
ID=83081792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/062904 WO2023222572A1 (en) | 2022-05-16 | 2023-05-15 | Paper sheet material with a glittering and reflective surface appearance |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2023222572A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07252799A (en) * | 1994-03-09 | 1995-10-03 | Tomoegawa Paper Co Ltd | Release paper |
| WO2001004416A1 (en) * | 1999-07-09 | 2001-01-18 | Raisio Chemicals Ltd. | Surface size composition |
| EP1353009A2 (en) * | 2002-04-12 | 2003-10-15 | Gruppo Cordenons S.p.A. | Glittering-reflecting sheet paper material and method for making the same |
| EP1431457A1 (en) * | 2002-12-20 | 2004-06-23 | GRUPPO CORDENONS S.p.A. | Sheet paper material with the look and feel of plastic, and related production method |
| WO2006060165A1 (en) * | 2004-11-30 | 2006-06-08 | Eastman Kodak Company | Electrophotographic media with carboxylic acid polymer |
| US20110046284A1 (en) * | 2009-08-24 | 2011-02-24 | Basf Corporation | Novel Treated Mineral Pigments for Aqueous Based Barrier Coatings |
| EP2314766A1 (en) * | 2009-10-19 | 2011-04-27 | Favini S.r.l. | Printable glazed paper article and its production process |
| US20160355687A1 (en) * | 2015-06-02 | 2016-12-08 | Kyu Seong Hwang | Coating composition for glitter sheet, printable glitter sheet using the same and method for manufacturing thereof |
-
2023
- 2023-05-15 WO PCT/EP2023/062904 patent/WO2023222572A1/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07252799A (en) * | 1994-03-09 | 1995-10-03 | Tomoegawa Paper Co Ltd | Release paper |
| WO2001004416A1 (en) * | 1999-07-09 | 2001-01-18 | Raisio Chemicals Ltd. | Surface size composition |
| EP1353009A2 (en) * | 2002-04-12 | 2003-10-15 | Gruppo Cordenons S.p.A. | Glittering-reflecting sheet paper material and method for making the same |
| EP1431457A1 (en) * | 2002-12-20 | 2004-06-23 | GRUPPO CORDENONS S.p.A. | Sheet paper material with the look and feel of plastic, and related production method |
| WO2006060165A1 (en) * | 2004-11-30 | 2006-06-08 | Eastman Kodak Company | Electrophotographic media with carboxylic acid polymer |
| US20110046284A1 (en) * | 2009-08-24 | 2011-02-24 | Basf Corporation | Novel Treated Mineral Pigments for Aqueous Based Barrier Coatings |
| EP2314766A1 (en) * | 2009-10-19 | 2011-04-27 | Favini S.r.l. | Printable glazed paper article and its production process |
| US20160355687A1 (en) * | 2015-06-02 | 2016-12-08 | Kyu Seong Hwang | Coating composition for glitter sheet, printable glitter sheet using the same and method for manufacturing thereof |
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