CN112109466A - Inkless display kit and preparation method and application thereof - Google Patents
Inkless display kit and preparation method and application thereof Download PDFInfo
- Publication number
- CN112109466A CN112109466A CN202010827537.0A CN202010827537A CN112109466A CN 112109466 A CN112109466 A CN 112109466A CN 202010827537 A CN202010827537 A CN 202010827537A CN 112109466 A CN112109466 A CN 112109466A
- Authority
- CN
- China
- Prior art keywords
- color
- inkless
- card
- display kit
- salicylic acid
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/333—Colour developing components therefor, e.g. acidic compounds
- B41M5/3333—Non-macromolecular compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention is suitable for the technical field of color development, and provides an inkless display kit and a preparation method and application thereof, wherein the inkless display kit comprises a color development card and color development liquid; wherein, the color development card comprises a substrate; the surface of the substrate is coated with a mixture of industrial alcohol and salicylic acid; the color developing solution comprises benzyl alcohol, diethylene glycol ethyl ether and a thermal-sensitive pigment. The color developing solution provided by the invention can generate chemical reaction when being contacted with the mixture on the color developing card, so that the color can be displayed on the color developing card, and the displayed color is determined by the thermal-sensitive pigment added in the color developing solution. The color developing liquid is not easy to remain on body parts such as fingers or tools, and the color developing liquid stained on the fingers, the tools and the like can be washed clean by clear water; in addition, fingerprints, characters or other patterns and the like displayed on the color development card by using the color development liquid have the characteristics of clear color development, high wear resistance and difficult fading.
Description
Technical Field
The invention belongs to the technical field of color development, and particularly relates to an inkless display kit and a preparation method and application thereof.
Background
Ink or inkpad is usually used when people record characters and pictures in daily life, although the ink or the inkpad can well print out fingerprints, palm prints, foot prints and pictures of people, the ink or the inkpad can be remained on body parts or tools, the cleaning is not easy, the chemical taste of the ink volatilizes, the ink is harmful to human bodies, especially infants, and the environment is polluted.
Therefore, in order to solve the above problems, a method for developing a color with less ink residue is needed.
Disclosure of Invention
An object of an embodiment of the present invention is to provide an inkless display kit, which aims to solve the problems set forth in the background art.
The embodiment of the invention is realized in such a way that an inkless display kit comprises:
a color development card comprising a substrate; the surface of the substrate is coated with a mixture of industrial alcohol and salicylic acid; and
the color development liquid comprises benzyl alcohol, diethylene glycol ethyl ether and a thermal dye; the mass ratio of the benzyl alcohol to the diethylene glycol ethyl ether to the thermal-sensitive pigment is (10-15): (10-15): 1.
According to a preferable mode of the embodiment of the invention, the mass ratio of the benzyl alcohol, the diethylene glycol ethyl ether and the thermal dye is (12-14): 1.
In another preferable embodiment of the invention, the mass ratio of the industrial alcohol to the salicylic acid is (20-30): 1.
In another preferable mode of the embodiment of the invention, the mass ratio of the industrial alcohol to the salicylic acid is (24-26): 1.
As another preferable scheme of the embodiment of the invention, the volume concentration of ethanol in the industrial alcohol is 95-99%.
As another preferable aspect of the embodiment of the present invention, the substrate is paper.
As another preferable aspect of the embodiment of the present invention, the substrate is coated paper.
Another object of an embodiment of the present invention is to provide a method for preparing the above inkless display kit, which includes the following steps:
weighing industrial alcohol and salicylic acid, and uniformly mixing the industrial alcohol and the salicylic acid to obtain a mixture of the industrial alcohol and the salicylic acid;
taking a substrate, dipping the mixture of the industrial alcohol and the salicylic acid by using absorbent paper, coating the mixture on the surface of the substrate, and airing to obtain the color developing card;
weighing the benzyl alcohol, the diethylene glycol ethyl ether and the thermal-sensitive pigment according to the mass ratio of the benzyl alcohol, the diethylene glycol ethyl ether and the thermal-sensitive pigment;
and uniformly mixing benzyl alcohol, diethylene glycol ethyl ether and the thermal-sensitive pigment to obtain the color developing solution.
Another object of the embodiments of the present invention is to provide an inkless display kit manufactured by the above manufacturing method.
Another object of the embodiments of the present invention is to provide a use of the above inkless display kit for recording characters and/or patterns.
The inkless display kit provided by the embodiment of the invention comprises a color developing solution which can generate chemical reaction when being contacted with a mixture on a color developing card, so that the color can be displayed on the color developing card, and the displayed color is determined by a thermal pigment added in the color developing solution. The color developing liquid is not easy to remain on body parts such as fingers or tools, and the color developing liquid stained on the fingers, the tools and the like can be washed clean by clear water; in addition, fingerprints, characters or other patterns and the like displayed on the color development card by using the color development liquid have the characteristics of clear color development, high wear resistance and difficult fading.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 20g of industrial alcohol with the ethanol volume concentration of 95% in a container, and stirring for 1min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 5 minutes to obtain the color card.
The preparation method of the color developing solution comprises the following steps:
10g of benzyl alcohol, 10g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 1 minute at normal temperature by using a stirring rod, so that the components are fully dissolved, and the color developing solution can be obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Example 2
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 30g of industrial alcohol with the ethanol volume concentration of 99% in a container, and stirring for 2min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 1 minute to obtain the color developing card.
The preparation method of the color developing solution comprises the following steps:
15g of benzyl alcohol, 15g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 2 minutes by a stirring rod at normal temperature to fully dissolve all the components, so that the color developing solution can be obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Example 3
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 21g of industrial alcohol with the ethanol volume concentration of 96% in a container, and stirring for 1.5min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 3 minutes to obtain the color developing card.
The preparation method of the color developing solution comprises the following steps:
10g of benzyl alcohol, 15g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 1.5 minutes by a stirring rod at normal temperature to fully dissolve all the components, so that the color developing solution can be obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Example 4
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 28g of industrial alcohol with ethanol volume concentration of 98% in a container, and stirring for 2min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 4 minutes to obtain the color developing card.
The preparation method of the color developing solution comprises the following steps:
15g of benzyl alcohol, 10g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 1 minute at normal temperature by using a stirring rod, so that the components are fully dissolved, and the color developing solution can be obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Example 5
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 24g of industrial alcohol with the ethanol volume concentration of 99% in a container, and stirring for 2min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 3 minutes to obtain the color developing card.
The preparation method of the color developing solution comprises the following steps:
12g of benzyl alcohol, 12g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 2 minutes by a stirring rod at normal temperature to fully dissolve all the components, so that the color developing solution can be obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Example 6
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 26g of industrial alcohol with the ethanol volume concentration of 99% in a container, and stirring for 2min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 3 minutes to obtain the color developing card.
The preparation method of the color developing solution comprises the following steps:
14g of benzyl alcohol, 14g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 2 minutes by a stirring rod at normal temperature to fully dissolve all the components, so that the color developing solution can be obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Example 7
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 25g of industrial alcohol with the ethanol volume concentration of 99% in a container, and stirring for 2min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 3 minutes to obtain the color developing card.
The preparation method of the color developing solution comprises the following steps:
12g of benzyl alcohol, 14g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 2 minutes by a stirring rod at normal temperature to fully dissolve all the components, so that the color developing solution can be obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Example 8
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 25g of industrial alcohol with the ethanol volume concentration of 99% in a container, and stirring for 2min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 3 minutes to obtain the color developing card.
The preparation method of the color developing solution comprises the following steps:
14g of benzyl alcohol, 12g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 2 minutes by a stirring rod at normal temperature to fully dissolve all the components, so that the color developing solution can be obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Example 9
This embodiment provides an inkless display kit including a color development card and a color development liquid.
Specifically, the preparation method of the color development card comprises the following steps:
s1, taking the coated paper as the substrate, but not limited to, other paper can be used, and the hardness and thickness of the paper can be selected according to the requirement.
S2, putting 1g of salicylic acid and 25g of industrial alcohol with the ethanol volume concentration of 99% in a container, and stirring for 2min by using a stirring rod at normal temperature to obtain a mixture of the industrial alcohol and the salicylic acid.
S3, spreading the coated paper on a net rack, dipping the mixture of the industrial alcohol and the salicylic acid on the upper surface and the lower surface of the coated paper by absorbent paper, respectively, and airing at normal temperature for 3 minutes to obtain the color developing card.
The preparation method of the color developing solution comprises the following steps:
13g of benzyl alcohol, 13g of diethylene glycol ethyl ether and 1g of thermal-sensitive pigment are placed in a container, and stirred for 2 minutes by a stirring rod at normal temperature to fully dissolve the components, so that the color developing solution is obtained. The thermosensitive pigment can be thermosensitive dye commonly used in the prior art, and can be specifically selected according to the color required to be displayed.
Application example:
firstly, soaking pure wood pulp paper (or mirror paper, which can be soft) in the color developing solution provided in the embodiment 9 to enable the color developing solution to fully soak the pure wood pulp paper; then, the fingers, the palms, and the soles are pressed on the pure wood pulp paper soaked with the developing solution, so that the positions of the fingers, the palms, and the soles are uniformly stained with the developing solution, and then the fingers, the palms, and the soles stained with the developing solution are pressed on the developing card provided in the above embodiment 9, at this time, the mixed solution in the developing solution and the developing card performs a chemical reaction, so that the patterns such as fingerprints, palm prints, and foot prints are slowly developed on the developing card, and the developed colors can be obtained by adding thermal pigments with corresponding colors to the developing solution according to the self requirements. In addition, the abrasion resistance and the fading resistance of the pattern shown on the color developing card are tested, and the test results are as follows: the patterns on the color development card can be completely retained after the patterns on the color development card are wiped 3000 times by using an eraser or the patterns on the color development card are placed on ground glass for friction; after the color development card is placed in a constant temperature and humidity aging box at 70 ℃ for 30 days, the patterns on the color development card can be clearly seen, and the color of the color development card is not changed.
Secondly, the color developing solution provided by the embodiment 9 is poured into the sponge of the ink pad, so that the sponge fully absorbs the color developing solution, and then the sponge stained with the color developing solution is pressed on the color developing card provided by the embodiment 9, and the stamp pattern can slowly appear on the color developing card.
Thirdly, the brush pen is dipped in the color development liquid provided by the embodiment 9, so that the brush pen can be used for carrying out inkless writing and drawing on the color development card provided by the embodiment 9; or the color developing solution provided by the embodiment 9 is put into the pen core, and the pen can be used for writing and drawing on the color developing card provided by the embodiment 9 without ink.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An inkless display kit, comprising:
a color development card comprising a substrate; the surface of the substrate is coated with a mixture of industrial alcohol and salicylic acid; and
the color development liquid comprises benzyl alcohol, diethylene glycol ethyl ether and a thermal dye; the mass ratio of the benzyl alcohol to the diethylene glycol ethyl ether to the thermal-sensitive pigment is (10-15): (10-15): 1.
2. The inkless display kit of claim 1, wherein the mass ratio of the benzyl alcohol, the diethylene glycol ethyl ether and the thermal dye is (12-14): (12-14): 1.
3. The inkless display kit according to claim 1, wherein the mass ratio of the industrial alcohol to the salicylic acid is (20-30): 1.
4. The inkless display kit according to claim 1, wherein the mass ratio of the industrial alcohol to the salicylic acid is (24-26): 1.
5. The inkless display kit of claim 3 or 4, wherein the volume concentration of ethanol in the industrial alcohol is 95% to 99%.
6. The inkless display kit of claim 1, wherein the substrate is paper.
7. The inkless display kit of claim 6, wherein the substrate is coated paper.
8. A method for preparing the inkless display kit according to any one of claims 1 to 7, comprising the steps of:
weighing industrial alcohol and salicylic acid, and uniformly mixing the industrial alcohol and the salicylic acid to obtain a mixture of the industrial alcohol and the salicylic acid;
taking a substrate, dipping the mixture of the industrial alcohol and the salicylic acid by using absorbent paper, coating the mixture on the surface of the substrate, and airing to obtain the color developing card;
weighing the benzyl alcohol, the diethylene glycol ethyl ether and the thermal-sensitive pigment according to the mass ratio of the benzyl alcohol, the diethylene glycol ethyl ether and the thermal-sensitive pigment;
and uniformly mixing benzyl alcohol, diethylene glycol ethyl ether and the thermal-sensitive pigment to obtain the color developing solution.
9. An inkless display kit prepared by the preparation method of claim 8.
10. Use of the inkless display kit of any one of claims 1 to 7 and claim 9 for recording characters and/or patterns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010827537.0A CN112109466A (en) | 2020-08-17 | 2020-08-17 | Inkless display kit and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010827537.0A CN112109466A (en) | 2020-08-17 | 2020-08-17 | Inkless display kit and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112109466A true CN112109466A (en) | 2020-12-22 |
Family
ID=73804916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010827537.0A Pending CN112109466A (en) | 2020-08-17 | 2020-08-17 | Inkless display kit and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112109466A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62169681A (en) * | 1986-01-22 | 1987-07-25 | Fuji Photo Film Co Ltd | Recording material |
| CN1106750A (en) * | 1993-02-12 | 1995-08-16 | 川清治 | Printed matter |
| CN1532070A (en) * | 2003-03-19 | 2004-09-29 | 富士胶片株式会社 | Ink jet recording method |
| CN103365133A (en) * | 2012-03-27 | 2013-10-23 | 柯尼卡美能达商用科技株式会社 | Production process for colorant, colorant composition, toner, ink for ink jet recording and color filter |
-
2020
- 2020-08-17 CN CN202010827537.0A patent/CN112109466A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62169681A (en) * | 1986-01-22 | 1987-07-25 | Fuji Photo Film Co Ltd | Recording material |
| CN1106750A (en) * | 1993-02-12 | 1995-08-16 | 川清治 | Printed matter |
| CN1532070A (en) * | 2003-03-19 | 2004-09-29 | 富士胶片株式会社 | Ink jet recording method |
| CN103365133A (en) * | 2012-03-27 | 2013-10-23 | 柯尼卡美能达商用科技株式会社 | Production process for colorant, colorant composition, toner, ink for ink jet recording and color filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7276181B2 (en) | Method for preparing decorative glass using glass etching composition | |
| US5215956A (en) | Color changing print | |
| CN100586613C (en) | Metal colloid particles, metal colloid and use of the colloid | |
| US3079309A (en) | Coloring of anodized aluminum | |
| CN103849497B (en) | Common self-adhesive glue scavenger and production process thereof | |
| CN112109466A (en) | Inkless display kit and preparation method and application thereof | |
| CN110724411A (en) | Special environment-friendly ink formula for marking pen and preparation method thereof | |
| CN102604483A (en) | White board wax pencil capable of wiping up writing marks by water | |
| CN108859389A (en) | A kind of plate-making of screen process method, screen printing plate and silk-screen printing technique | |
| CN107699048A (en) | A kind of preparation method for easily wiping teaching ink | |
| US2849331A (en) | Masking method and composition for producing color paintings | |
| JP4118093B2 (en) | Oil-based marking pen ink composition for plastic model painting | |
| CN205853711U (en) | The water of lasting fragrance transfers patch of tatooing | |
| Wilkinson | Photo-engraving, Photo-etching and Photo-lithography in Line and Half-tone: Also Collotype and Heliotype | |
| CN103321061B (en) | The preparation method of a kind of creative design printing dye liquor, dye liquor and application | |
| Duchochois | Photographic Reproduction Processes | |
| JPH0959547A (en) | Colored ink and writing system using the same | |
| Tokuno | Japanese wood-cutting and wood-cut printing | |
| DE3873372T2 (en) | INK COMPOSITION AND PRINT-SENSITIVE COPY MATERIAL. | |
| JPS59182776A (en) | Stamping set | |
| CN102079901B (en) | Method for manufacturing environmental-protection water-based pigment pen | |
| Waters | Inks | |
| EP0275870B1 (en) | A pressure sensitive reproducing material | |
| JP2979338B2 (en) | Ink for marking pen | |
| SU1216250A1 (en) | Formulation for marking metal parts |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201222 |