CN112162095A - Hydrophilic film and manufacturing method thereof - Google Patents
Hydrophilic film and manufacturing method thereof Download PDFInfo
- Publication number
- CN112162095A CN112162095A CN202011015971.5A CN202011015971A CN112162095A CN 112162095 A CN112162095 A CN 112162095A CN 202011015971 A CN202011015971 A CN 202011015971A CN 112162095 A CN112162095 A CN 112162095A
- Authority
- CN
- China
- Prior art keywords
- hydrophilic
- coating
- liquid
- base film
- mixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 77
- 238000000576 coating method Methods 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 239000000126 substance Substances 0.000 claims abstract description 38
- 230000000873 masking effect Effects 0.000 claims abstract description 30
- 239000012528 membrane Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000000049 pigment Substances 0.000 claims description 13
- 230000000007 visual effect Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000002195 soluble material Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- -1 Polyethylene terephthalate Polymers 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000700605 Viruses Species 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000010339 medical test Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/66—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood sugars, e.g. galactose
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/52—Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper and including single- and multilayer analytical elements
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hematology (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Urology & Nephrology (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Cell Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Biotechnology (AREA)
- Analytical Chemistry (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Diabetes (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a hydrophilic membrane and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: s1, uniformly mixing the hydrophilic masking liquid and the colored substance according to a preset proportion to form a mixed masking liquid, wherein the hydrophilic masking liquid is dissolved with the colored substance; s2, uniformly coating the mixed coating liquid on a base film; and S3, drying the mixed coating liquid on the base film to obtain a hydrophilic coating, wherein the hydrophilic coating and the base film form the hydrophilic film. Because the hydrophilic coating comprises the colored substances, whether the hydrophilic film is qualified can be checked by visual tools such as naked eyes or image processing and the like in the process of manufacturing and using the hydrophilic film, and when the hydrophilic coating liquid is locally leaked and coated or the hydrophilic coating liquid is unevenly coated, the hydrophilic coating liquid leakage area and the uneven coating area can be conveniently and quickly identified.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a hydrophilic membrane and a manufacturing method thereof.
Background
The hydrophilic membrane can be used for medical detection sheets for relevant detection, for example, a blood glucose test paper is a hydrophilic membrane. The hydrophilic film is mainly formed by coating a transparent hydrophilic coating layer on a base film such as PET (Polyethylene terephthalate) or PP (polypropylene). The hydrophilic membrane for medical detection is used for enabling a detection sample to rapidly reach a reaction area through the siphoning effect of the hydrophilic membrane.
However, referring to fig. 1 and fig. 2, in the process of manufacturing the hydrophilic film, a hydrophilic coating may be partially omitted or unevenly coated, and since the hydrophilic coating is transparent and colorless, the defective products are difficult to be found by naked eyes, and the defective products cause that the medical detection piece cannot sample, so that the detection test paper fails.
Disclosure of Invention
The invention provides a hydrophilic film and a manufacturing method thereof, which aim to solve the technical problem that the existing hydrophilic film is difficult to identify under the condition of local hydrophilic coating missing or uneven coating.
In order to solve the technical problems, the invention provides a hydrophilic membrane, which comprises a base membrane and a hydrophilic coating, wherein the hydrophilic coating is coated on the base membrane;
the hydrophilic coating is prepared by mixing hydrophilic masking liquid and colored substances, and the hydrophilic masking liquid is dissolved with the colored substances.
Optionally, the colored substance comprises an aqueous pigment, an oily pigment or a fluorescent agent.
Optionally, the color of the colored substance is red, yellow, blue or white.
Optionally, the mass ratio of the colored substance to the hydrophilic masking liquid is 1: 10000-1: 10.
Optionally, the base film is made of PET or PP.
The invention also provides a preparation method of the hydrophilic membrane, which comprises the following steps:
s1, uniformly mixing the hydrophilic masking liquid and the colored substance according to a preset proportion to form a mixed masking liquid, wherein the hydrophilic masking liquid is dissolved with the colored substance;
s2, uniformly coating the mixed coating liquid on a base film;
and S3, drying the mixed coating liquid on the base film to obtain a hydrophilic coating, wherein the hydrophilic coating and the base film form the hydrophilic film.
Optionally, the steps S2 and S3 further include: checking whether the thickness of the mixed masking liquid at each position on the base film reaches a preset threshold value; if so, executing the step S3; if not, recoating the positions on the base film where the thickness of the mixed coating liquid does not reach the preset threshold value, so that the thickness of the mixed coating liquid at each position on the base film reaches the preset threshold value.
Optionally, the step of drying the mixed coating solution on the base film specifically includes:
and drying the mixed coating liquid on the base film in a baking or ultraviolet irradiation mode.
According to the hydrophilic film and the manufacturing method thereof provided by the invention, as the hydrophilic coating comprises the colored substances, the hydrophilic film can be checked whether to be qualified or not by visual tools such as naked eyes or image processing and the like in the process of manufacturing and using the hydrophilic film, and when the hydrophilic coating is locally leaked or unevenly coated, the areas with leaked hydrophilic coating and the areas with uneven coating can be conveniently and quickly identified.
Drawings
FIG. 1 is a schematic plan view of a hydrophilic membrane according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a hydrophilic membrane according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for manufacturing a hydrophilic film according to an embodiment of the present invention.
[ reference numerals are described below ]:
1-basal membrane, 2-hydrophilic coating, 3-omission hydrophilic coating liquid area and 4-uneven coating area.
Detailed Description
To make the objects, advantages and features of the present invention more apparent, a hydrophilic membrane and a method for manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As shown in fig. 1 and 2, the hydrophilic film provided by the present invention comprises a base film 1 and a hydrophilic coating layer 2, wherein the hydrophilic coating layer 2 is coated on the base film 1; the hydrophilic coating 2 is prepared by mixing hydrophilic coating liquid and colored substances, and the hydrophilic coating liquid is dissolved with the colored substances.
The colored substance can be organic matter, inorganic matter or synthetic substance as long as the colored substance is soluble with the hydrophilic masking liquid and does not influence or slightly influences the hydrophilic performance of the hydrophilic masking liquid; the color type and the shade of the colored substance can be adjusted according to the requirement; the hydrophilic membrane can be used in a medical test strip, such as a blood glucose test strip or a virus test strip. The hydrophilic masking liquid corresponding to different types of hydrophilic membranes has different formulas, and corresponding colored substances are required to be selected for each type of hydrophilic masking liquid. Specifically, the colored hydrophilic film provided in this embodiment and the transparent hydrophilic film in the prior art may be compared and analyzed by a water dripping test, and whether the hydrophilic properties, such as the hydrophilic angle and the diffusion rate, of the two films are the same or close to each other is compared, and if so, the colored substance may be applied in this embodiment.
According to the hydrophilic film provided by the embodiment, the hydrophilic coating 2 comprises the colored substance, so that whether the hydrophilic film is qualified or not can be checked by visual tools such as naked eyes or image processing in the process of manufacturing and using the hydrophilic film, and when the hydrophilic coating is locally leaked or unevenly coated, the hydrophilic coating area 3 and the unevenly coated area 4 can be conveniently and quickly identified.
Optionally, the colored substance comprises an aqueous pigment, an oily pigment or a fluorescent agent. The materials of the existing hydrophilic masking liquid are mainly divided into water-soluble materials and oil-soluble materials. The hydrophilic coating liquid of the water-soluble material needs to be water-based pigment, and the hydrophilic coating liquid of the oil-soluble material needs to be oil-based pigment so that the pigment is dissolved with the corresponding hydrophilic coating liquid. The fluorescent agent can show an invisible color under characteristic illumination, and the fluorescent agent which is soluble with the hydrophilic coating solution can be used for manufacturing a hydrophilic film. Specifically, plant pigments can be used as the colored substance, and are classified into water-soluble pigments and fat-soluble pigments, and different kinds of plant pigments can be selected for different kinds of hydrophilic coating liquids.
Alternatively, the color of the colored substance may be red, yellow, blue, white or other colors. The hydrophilic film is made and used by adopting more obvious red, yellow, blue, white or other colored substances, and whether the hydrophilic coating is locally omitted or unevenly coated is easily detected.
Optionally, the mass ratio of the colored substance to the hydrophilic masking liquid is 1: 10000-1: 10. The mixed masking liquid is prepared in such a way that the color of the mixed masking liquid can be recognized by naked eyes; during specific manufacturing, the mass ratio of the colored substance to the hydrophilic masking liquid can be adjusted according to the needs of customers.
Optionally, the base film may be made of PET, PP, or other materials that can be made into a film. The PET or PP and other materials have certain flexibility, and are convenient to cut into different sizes.
Based on the same technical concept as that of the above hydrophilic membrane, the present invention also provides a method for manufacturing a hydrophilic membrane, as shown in fig. 2 and 3, the method comprising the steps of:
s1, uniformly mixing the hydrophilic masking liquid and the colored substance according to a preset proportion to form a mixed masking liquid, wherein the hydrophilic masking liquid is dissolved with the colored substance;
s2, uniformly coating the mixed coating liquid on the base film 1;
and S3, drying the mixed coating solution on the base film 1 to obtain a hydrophilic coating, wherein the hydrophilic coating and the base film form the hydrophilic film.
According to the method for manufacturing the hydrophilic film, the hydrophilic coating 2 comprises the colored substances, so that whether the hydrophilic film is qualified or not can be checked by visual tools such as naked eyes or image processing in the process of manufacturing and using the hydrophilic film, and when the hydrophilic coating is locally leaked or unevenly coated, the hydrophilic coating area 3 and the unevenly coated area 4 can be conveniently and quickly identified.
Optionally, the steps S2 and S3 further include: checking whether the thickness of the mixed masking liquid at each position on the base film reaches a preset threshold value; if so, executing the step S3; if not, recoating the positions on the base film where the thickness of the mixed coating liquid does not reach the preset threshold value, so that the thickness of the mixed coating liquid at each position on the base film reaches the preset threshold value. Since the mixed coating liquid has a color, the hydrophilic coating liquid coated region 3 and the uneven coating region 4 are easily recognized during the manufacturing and using processes, thereby improving the yield.
Optionally, the step of S3 specifically includes: and drying the mixed coating liquid on the base film in a baking or ultraviolet irradiation mode. In other embodiments, the mixed coating solution on the base film may be dried in other drying manners to obtain the hydrophilic film.
In summary, according to the hydrophilic film and the method for manufacturing the same provided by the present invention, since the hydrophilic coating 2 includes the colored substance, the hydrophilic film can be inspected to be qualified or not by using a visual tool such as naked eyes or image processing during the process of manufacturing and using the hydrophilic film, and when the hydrophilic coating is locally leaked or unevenly coated, the hydrophilic coating area 3 and the uneven coating area 4 can be conveniently and quickly identified.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the claims of the present invention.
Claims (8)
1. A hydrophilic membrane, comprising a base membrane and a hydrophilic coating, wherein the hydrophilic coating is coated on the base membrane;
the hydrophilic coating is prepared by mixing hydrophilic masking liquid and colored substances, and the hydrophilic masking liquid is dissolved with the colored substances.
2. A hydrophilic membrane according to claim 1, wherein the coloured substance comprises an aqueous pigment, an oily pigment or a fluorescer.
3. A hydrophilic membrane according to claim 1, wherein the coloured substance is red, yellow, blue or white in colour.
4. The hydrophilic membrane as claimed in claim 1, wherein the mass ratio of the colored substance to the hydrophilic masking liquid is 1: 10000-1: 10.
5. A hydrophilic membrane according to claim 1, wherein the base membrane is made of PET or PP.
6. A method of making a hydrophilic membrane, comprising the steps of:
s1, uniformly mixing the hydrophilic masking liquid and the colored substance according to a preset proportion to form a mixed masking liquid, wherein the hydrophilic masking liquid is dissolved with the colored substance;
s2, uniformly coating the mixed coating liquid on a base film;
and S3, drying the mixed coating liquid on the base film to obtain a hydrophilic coating, wherein the hydrophilic coating and the base film form the hydrophilic film.
7. A method for making a hydrophilic membrane according to claim 6, further comprising, between steps S2 and S3: checking whether the thickness of the mixed masking liquid at each position on the base film reaches a preset threshold value; if so, executing the step S3; if not, recoating the positions on the base film where the thickness of the mixed coating liquid does not reach the preset threshold value, so that the thickness of the mixed coating liquid at each position on the base film reaches the preset threshold value.
8. A method for making a hydrophilic membrane according to claim 6, wherein the step of drying the mixed coating solution on the base membrane specifically comprises:
and drying the mixed coating liquid on the base film in a baking or ultraviolet irradiation mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011015971.5A CN112162095A (en) | 2020-09-24 | 2020-09-24 | Hydrophilic film and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011015971.5A CN112162095A (en) | 2020-09-24 | 2020-09-24 | Hydrophilic film and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112162095A true CN112162095A (en) | 2021-01-01 |
Family
ID=73863821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011015971.5A Pending CN112162095A (en) | 2020-09-24 | 2020-09-24 | Hydrophilic film and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112162095A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61171571A (en) * | 1985-01-25 | 1986-08-02 | Matsushita Electric Works Ltd | Coating method |
| WO2002071045A2 (en) * | 2001-01-22 | 2002-09-12 | General Electric Company | Method for determination of structural defects of coatings |
| JP2004123996A (en) * | 2002-10-07 | 2004-04-22 | Hitachi Ltd | Hydrophilic film and hydrophobic film formed on organic resin |
| JP2006206914A (en) * | 2006-03-03 | 2006-08-10 | Hitachi Ltd | Coating for forming hydrophilic film on the resin board |
| JP2007301562A (en) * | 2007-07-06 | 2007-11-22 | Kobe Steel Ltd | Method for manufacturing base material having hydrophilic surface |
| US20080260579A1 (en) * | 2007-04-17 | 2008-10-23 | Tesa Aktiengesellschaft | Sheet-like material with hydrophilic and hydrophobic egions and their production |
| JP2013152153A (en) * | 2012-01-25 | 2013-08-08 | Toray Eng Co Ltd | Film thickness irregularity detection device and method, and coating device with film thickness irregularity detection device and film thickness irregularity detection method of coating film formed on substrate |
| JP5335981B1 (en) * | 2012-08-31 | 2013-11-06 | 株式会社日本デキシー | Coating layer inspection method |
| CN105738432A (en) * | 2016-01-27 | 2016-07-06 | 杭州瑞健科技有限公司 | Hydrophilic film having stable and reliable performances and used for blood glucose test paper |
| US20160312058A1 (en) * | 2015-04-24 | 2016-10-27 | Eternal Materials Co., Ltd. | Hydrophilic film for ex vivo membrane |
| JP2016200439A (en) * | 2015-04-08 | 2016-12-01 | 凸版印刷株式会社 | Coating film unevenness measurement method and coating film unevenness measurement device |
| KR20170060679A (en) * | 2015-11-25 | 2017-06-02 | 주식회사 세화무역 | Manufacturing method of hydrophile film for blood sugar strip using for measuring blood sugar level |
| CN111004566A (en) * | 2019-12-18 | 2020-04-14 | 湖南智涂环保科技有限公司 | Hydrophilic coating for detection test paper and preparation method and application thereof |
-
2020
- 2020-09-24 CN CN202011015971.5A patent/CN112162095A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61171571A (en) * | 1985-01-25 | 1986-08-02 | Matsushita Electric Works Ltd | Coating method |
| WO2002071045A2 (en) * | 2001-01-22 | 2002-09-12 | General Electric Company | Method for determination of structural defects of coatings |
| JP2004123996A (en) * | 2002-10-07 | 2004-04-22 | Hitachi Ltd | Hydrophilic film and hydrophobic film formed on organic resin |
| JP2006206914A (en) * | 2006-03-03 | 2006-08-10 | Hitachi Ltd | Coating for forming hydrophilic film on the resin board |
| US20080260579A1 (en) * | 2007-04-17 | 2008-10-23 | Tesa Aktiengesellschaft | Sheet-like material with hydrophilic and hydrophobic egions and their production |
| JP2007301562A (en) * | 2007-07-06 | 2007-11-22 | Kobe Steel Ltd | Method for manufacturing base material having hydrophilic surface |
| JP2013152153A (en) * | 2012-01-25 | 2013-08-08 | Toray Eng Co Ltd | Film thickness irregularity detection device and method, and coating device with film thickness irregularity detection device and film thickness irregularity detection method of coating film formed on substrate |
| JP5335981B1 (en) * | 2012-08-31 | 2013-11-06 | 株式会社日本デキシー | Coating layer inspection method |
| JP2016200439A (en) * | 2015-04-08 | 2016-12-01 | 凸版印刷株式会社 | Coating film unevenness measurement method and coating film unevenness measurement device |
| US20160312058A1 (en) * | 2015-04-24 | 2016-10-27 | Eternal Materials Co., Ltd. | Hydrophilic film for ex vivo membrane |
| CN106066394A (en) * | 2015-04-24 | 2016-11-02 | 长兴材料工业股份有限公司 | Hydrophilic membrane for extracorporeal membrane |
| KR20170060679A (en) * | 2015-11-25 | 2017-06-02 | 주식회사 세화무역 | Manufacturing method of hydrophile film for blood sugar strip using for measuring blood sugar level |
| CN105738432A (en) * | 2016-01-27 | 2016-07-06 | 杭州瑞健科技有限公司 | Hydrophilic film having stable and reliable performances and used for blood glucose test paper |
| CN111004566A (en) * | 2019-12-18 | 2020-04-14 | 湖南智涂环保科技有限公司 | Hydrophilic coating for detection test paper and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jaikang et al. | Simple colorimetric ammonium assay employing well microplate with gas pervaporation and diffusion for natural indicator immobilized paper sensor via smartphone detection | |
| CN104226388B (en) | A kind of based on laser-assisted disposable Test paper preparation method | |
| US20080296734A1 (en) | Microchip and method of manufacturing microchip | |
| CZ293568B6 (en) | Diagnostic test carrier for determining analyte from whole blood and method for determining such analyte by making use thereof | |
| DE69504193T2 (en) | IMPROVED METHOD FOR DETECTING THE OXYGEN PERMEABILITY OF AN OBJECT | |
| WO2006032025A1 (en) | Food quality indicator | |
| GB1582153A (en) | Multilayer analytical element | |
| EP1566637A1 (en) | Single layer teststrip | |
| DE3506365C2 (en) | ||
| DE3215983C2 (en) | ||
| EP0757921B1 (en) | Liquid holding device | |
| CN106000487A (en) | Preparation method of micro-fluidic paper chip based on hydrophobic and oleophobic properties of fluorine material | |
| CN112162095A (en) | Hydrophilic film and manufacturing method thereof | |
| Luo et al. | Detection of primary aromatic amines content in food packaging ink and migration from printed plastic bags | |
| JP6065073B2 (en) | Microbe culture sheet | |
| EP1912731A1 (en) | Manufacture of array chips | |
| EP3400440B1 (en) | Water color pigment solutions for use with reflectance-based diagnostic analyzers | |
| CN110196249A (en) | A kind of paper chip of integration standard colour band | |
| JP5796294B2 (en) | Microbe culture sheet | |
| CN104693892B (en) | A kind of historical relic hidden code identification liquid | |
| CN110222376B (en) | Computer color matching method for semitransparent material | |
| WO2008001834A1 (en) | Laminate type oxidizing-gas indicator and method of detecting oxidizing gas | |
| JPH0236120Y2 (en) | ||
| JP3474930B2 (en) | How to check the invisible surface treatment on the paper | |
| Zarate et al. | A fluorogenic method for lifting, enhancing, and preserving bloody impression evidence |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210101 |
|
| RJ01 | Rejection of invention patent application after publication |