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278results about How to "Write fluently" patented technology

Pigment carbon black neutral pen ink and its preparation method

InactiveCN1865364ASolve problems such as compatibilityWrite fluentlyInksSolventPigment
The invention relates to a carbon black ink and method for making same, wherein the constituents include (by weight portion) carbon black color paste 30-40%, solvent 10-30%, thickening agent 1-5%, volatilization suppressing agent 0.5-5%, pH conditioning agent 1-3%, lubricating agent 1-2%, antirust agent 0.5-2%, preservative agent 0.5-2%, and deionized water 30-50%.
Owner:EAST CHINA UNIV OF SCI & TECH +1

Erasable gel ink and preparation method thereof

The invention provides an erasable gel ink which consists of the components as follows: (a) 5-40 parts by weight of temperature sensitive dye; (b) 0.5-5 parts by weight of wetting and dispersing agent; (c) 0.1-8 parts by weight of thickening agent; (d) 0.1-5 parts by weight of adhesion promoter; and (e) 5-30 parts by weight of moisture lubricant; (f) 0.05-0.5 parts by weights of antiseptic anti-mildew agent; (g) 15-85 parts by weight of water. Total weight of the components (a)-(g) accounts for 98-100% of the entire compound weight. The invention also provides a preparation method of the gel ink and a product employing the gel ink of the invention.
Owner:上海乐美文具有限公司

Conductive laminate and method of producing the same

Provided is a conductive laminate comprising a base resin layer and a conductive layer on at least one surface of a substrate, by stacking in the sequential order of the base resin layer and the conductive layer from the substrate side, and in which the base resin layer comprises a resin including a urethane acrylate resin having a glycol skeleton, and a grafted resin having a hydrophilic group among side chains thereof. A touch panel using the conductive laminate of the present invention exhibits good writing sense, high input sensitivity and favorable durability. In addition, the conductive laminate of the present invention is preferably used for electrode members, which are employed in display products such as a liquid crystal display, an organic electro-luminescence, and an electronic paper as well as solar cell modules, and so forth.
Owner:TORAY IND INC

Display device

A digital image signal fed from the drain signal line is written into a retaining circuit through a pixel element selection TFT and a liquid crystal displays an image based on the digital image signal. In the retaining circuit, a threshold voltage of the first inverter circuit is set smaller than a threshold voltage of the second inverter circuit. Therefore, false writing of the image signal data into the retaining circuit can be prevented, leading to an accurate display the image signal retained in the retaining circuit.
Owner:SANYO ELECTRIC CO LTD

Water-borne white board pen ink capable of being wiped dryly or with wiping agent and wiping agent thereof

The invention discloses a water-borne white board pen ink capable of being wiped dryly or with wiping agent and the wiping agent thereof. The ink mainly comprises distilled water, film-forming resin, flatting agent, sulfate, castor oil, interfacial agent, color-developing agent, drier and isothiazolinone. The ink is equipped with a special wiping agent. The white board ink uses water as solvent and colorant which reacts with reducer at normal temperature and voltage and is decolorized as the color-developing agent. The handwriting can be wiped dryly in a physical wiping manner and with the wiping agent in a chemical reaction wiping manner. The invention has the advantages of saving energy, environmental protection, no poison and pungent smell, easy writing and wiping, simple manufacture technology, low use cost and stable performance after long-term placement. The ink does not leak into the board face and cause pollution even after long-term use.
Owner:方为

Solid colorful writing pen

The invention relates to a solid color writing pen, which consists of an acid-base indicator, an alkaline compound, a humectant, a surfactant, a lubricant, an adhesive, a substrate, ethanol and water. The preparation method comprises the following steps: a mixture is subjected to mixing, heating, dissolving, evenly stirring, film injection and molding to form the solid color writing pen. The solid color writing pen can replace chalks and whiteboard pens and is mainly used for teaching board writing, office noting and the like. The color writing pen has the characteristics that the pen has good stability, smooth writing, does not contaminate cloths and articles, has no pollution of dust and is environment-friendly; the writing can be wiped and fade by a wet cloth instantly; the pen also has long service life; the ruling length of a 1gram of pen body can reach 446.5 meters; compared with the chalk with the same quality, the writing amount of one color writing pen corresponds to the writing amount of seven common chalks; in addition, the pen also has the characteristics that the pen protects the environment and has bright and clear writing color, and even if under the environment with 70 percent relative humidity, the writing can be also remained and does not fade for a long time.
Owner:SHIJIAZHUANG KEDA STATIONERY

Pressure compensation method and system of electromagnetic pen and terminal

The invention discloses a pressure compensation method and system of an electromagnetic pen and a terminal. The pressure compensation method comprises steps of sampling different pressure of the standard electromagnetic pen, and generating and storing a pressure-frequency-line width table of the standard electromagnetic pen; performing pressure correction on the electromagnetic pen to be detected, calculating compensation frequency difference, and generating and storing a pressure frequency difference table of standard pressure-corrected frequency range-compensation frequency difference-line width; detecting actual frequency of the electromagnetic pen used by users to perform writing actually, and performing frequency compensation according to the pressure frequency difference table; matrixing the compensated frequency to obtain a corresponding line width value to display right line width. By means of the method and system, writing problems caused by errors of different electromagnetic pen elastic systems are solved, users can write smoothly with the electromagnetic pen in different hardness, and consistency of handwriting and user experience are improved.
Owner:深圳市经纬科技有限公司

Method and system for processing writing area of touch screen

The invention provides a method and system for processing a writing area of a touch screen. The method comprises the steps that a touch point position at the current time of the touch screen is obtained, and the writing area at the current time is determined according to the touch point position; whether a toolbar in a current page coincides with the writing area is detected, and if yes, the toolbar with an area overlapped with the writing area is removed out of the writing area. By means of the method, self-adaptive processing of the writing area can be achieved, and the processing effect is good.
Owner:GUANGZHOU SHIRUI ELECTRONICS

Aqueous marking ink composition

InactiveUS20120316276A1Suitable and good wetting propertyLow viscosityMaterial nanotechnologyInksMarking InkAlcohol
An aqueous marking ink composition that contains at least 1 to 20% by mass of a resin which is water-soluble and has a hydrophobic part in a molecule thereof, a colorant containing at least 5 to 30% by mass of titanium oxide, 0.05 to 2% by mass of at least one selected from acetylene glycols, acetylene alcohols or derivatives thereof, 1 to 20% by mass of a water-soluble solvent having a vapor pressure of 5 mmHg or less at 25° C. and water. The composition can provide good wetting property to a non-absorbing surface of metals, resins and the like stained with oils, can write smoothly thereon at a low viscosity without being repelled to make it possible to obtain drawn lines having a high masking property and a high fixing property, and is readily redispersed by a simple stirring operation.
Owner:MITSUBISHI PENCIL CO LTD

Processing method and system for touch screen writing area

The invention provides a processing method and system for a touch screen writing area. The processing method for the touch screen writing area comprises the following steps: detecting a touch point input on a touch screen; expanding the writing area when the condition that the touch point is positioned on a boundary area preset in the writing area is judged according to the position of the touch point on the touch screen. By adopting the processing method and system, automatic processing of the writing area can be realized, and a good processing effect is achieved.
Owner:GUANGZHOU SHIRUI ELECTRONICS

Black ink for gel pen and preparation method thereof

The invention discloses a black ink for a gel-ink pen and a preparation method thereof. The black ink comprises the following raw materials by weight percent: 30%-40% of carbon black slurry, 5%-30% of organosilicon modified acrylic resin emulsion, 10%-30% of solvent, 0.3%-0.8% of thickening agent, 1%-3% of pH regulator, 0.2%-2.0% of lubricant, 0.3%-2.0% of antirust additive, 0.2%-2.0% of preservative, 0.02%-0.5% of defoamer and the balance of deionized water. The ink has the advantages of uniform dispersion, appropriate viscosity, high system stability, good high-low temperature resistance and the like; and the prepared gel-ink pen is smoothly used for writing without leakage, has long uncapping time and can be used for normally writing under the environment of minus 20 DEG C-60 DEG C. The invention also discloses the preparation method of the ink. The preparation method has the characteristics that the process is easy to control and convenient for regulation.
Owner:杭州华大海天科技股份有限公司

Environmental-friendly writing ink for white board pen

The invention discloses an environmental-friendly writing ink for a white board pen. The writing ink is made from the following materials in part by weight: 4-8 parts of plant pigments, 6-10 parts of emulsifying agents, 2-5 parts of castor oil, 3-7 parts of palygouskite, 15-25 parts of ethanol and 30-80 parts of deionized water. The ink has the advantages of environment protection, safety, stable long-placed performance, bright and soft color and smoothness in writing, can be quickly erased by water and is particularly applicable to the teaching white board pen.
Owner:SHANDONG LANBEISITE EDUCATIONAL EQUIP GRP

Manufacturing method of baking paint of silver gray low-light writing board and color paste used thereby

The invention discloses a manufacturing method of baking paint of a silver gray low-light writing board and color paste used thereby, which are invented to thoroughly solve the problem that the existing teaching blackboards of China's schools are serious in pollution of writing dust. The baking paint consists of resin, pigment, assistant, solvent and the like. The paint is coated on the existing steel blackboard, so that a blackboard is tough in coatings, strong in adhesion and non-glare. With a liquid environment-friendly writing pen matched for use, the blackboard has the advantages of writing well, easy rubbing, smooth writing, no dust pollution and the like, and the service life of the blackboard is long. Due to the soft color of the blackboard, the visual and metal states of students can be kept good, and the vision of the students is not damaged due to long use.
Owner:谢立华

Business logic modeling system based on 6W

InactiveCN104346669AThe modeling process is clear and simpleRich in designResourcesLogical analysisComputer science
The invention relates to the technical field of computer information, and particularly discloses a business logic modeling system based on 6W.The business logic modeling system comprises a business logic modeling system based on 6W and a business logic model definition template, wherein a classification system uses activities as a center to organize the relations among various classifications, the classification system covers all related concepts in a business process, and the division of the classifications is not intersected; relation types among the concepts in the classification system are unified; a user finishes business logic analysis and model definition work under the constraint and guidance of predefined modeling rules in the template. The classification system covers all of the related concepts in the business process, and the division of the classifications is definite and is not intersected. The relation types among the concepts in the classification system are standard and are unified. The invention provides the business logic model definition template, and the user finishes the business logic analysis and the model definition work under the modeling rules provided by the template.
Owner:KARAMAY HONGYOU SOFTWARE

Manufacturing method of top-grade ivory white offset printing paper

The invention discloses a manufacturing method of top-grade ivory white offset printing paper. Bleached sulfate needlebush chemical pulp NBKP, bleached sulfate broad-leaf wood chemical pulp LBKP and alkaline hydrogen peroxide bleached cotton wood mechanical pulp APMP are used as fiber raw materials to carry out the papermaking, and a product is manufactured by virtue of thick pulp screening, mixing, slushing, sand and gas removal, sizing, fine screening, net-part dewatering forming, squeezing, pre-drying, surface gluing, post-drying, press polishing, coiling and packing. Each sizing agent comprises the following components by weight percent: 10 to 30 percent of the bleached sulfate needlebush chemical pulp NBKP, 50 to 70 percent of bleached sulfate broad-leaf wood chemical pulp LBKP, and 5 to 20 percent of alkaline hydrogen peroxide bleached cotton wood mechanical pulp APMP. The prepared top-grade ivory white offset printing paper is pure white and bulking in paper tissue, exquisite in surface, high in color restoration degree of a printed product and smooth in writing; and meanwhile, the surface strength of the paper can meet the 8-color commercial roller transfer printing requirement.
Owner:YUEYANG FOREST & PAPER CO LTD

Resin crayon capable of being used as screw rod and preparation method thereof

The invention discloses a resin crayon capable of being used as screw rod and a preparation method thereof. The resin crayon is prepared from, by weight, raw paraffin 30%- 50%, stearic acid 2% - 15%, polyethylene wax 5% -15%, low density polyethylene 15%-35%, talcum powder 5% -15%, white oil 0.5% - 5%, and pigment 3% -10%. By adding the polyethylene wax and the low density polyethylene in the formulation of the raw materials, and optimally controlling the addition amount of the polyethylene wax and the low density polyethylene, namely, controlling the total addition amount of the polyethylene wax and the low density polyethylene to 35-45%, the strength of resin crayon can be effectively improved, and the resin crayon is not prone to break and crack, has excellent breaking-resistant strength, and can be well used as the screw rod of a rotatable resin crayon product, at the same time, the writing performance of the resin crayon product can be greatly enhanced. The resin crayon product can write smoothly and has uniform coloring performance. In addition, based on the extremely high melting point of the polyethylene wax and the low density polyethylene, the high temperature resisting properties of the resin crayon product can be greatly improved.
Owner:LOTUS STATIONERY

Alcohol soluble white board marker ink easy to dry-erase and preparation method thereof

The invention relates to alcohol soluble white board marker ink easy to dry-erase and a preparation method thereof. The alcohol soluble white board marker ink comprises, by weight, 4.0-12% of macromolecule pigment, 30-60% of ethanol, 20-50% of isopropanol, 0.4-3.0% of polyvinyl butyral (PVB), 0.4-3.0% of fatty alcohol-polyoxyethylene ether, 0.4-3.0% of Solsperse series of hyperdispersant, 0.4-3.0% of glycerol, 0.1-3.0% of triethanolamine, 0.1-3.0% of paroline, 4.0-12% of laurate and 4.0-10% of butyl stearate. The preparation method includes: under the normal temperature and pressure, adding ethanol and isopropanol into a preparation vessel, then adding fatty alcohol-polyoxyethylene ether, Solsperse series of hyperdispersant, glycerol, triethanolamine, paroline, laurate and butyl stearate, then adding PVB, stirring evenly, finally adding the macromolecule pigment, and stirring for 4-8 h to obtain the ink. After the ink is dropped on the whiteboard, the ink is good in film-forming property, even in film coating, bright in color and good in stability. The preparation method is simple and easy to practice.
Owner:NINGBO UNIV

Writing paper capable of preventing myopia

The invention discloses a light-yellow writing paper capable of preventing myopia. The preparation method of the writing paper comprises the following steps: mixing hardwood slurry and softwood slurry according to a weight ratio of 1:0.5-1.3, bleaching the mixed slurry, dispersing the slurry, grinding the slurry, proportioning the slurry to obtain paper slurry, and finally moulding the paper slurry to obtain paper through a conventional method. During the slurry proportioning process, the following additives are added in percentage by the total weight of paper slurry: 0.001 to 0.002% of alkaline light yellow, 0.001 to 0.006% of alkaline orange, 0 to 0.001% of benzidine yellow, 0.001 to 0.002% of chrysophenine G, and 0.01% of titanium dioxide. The prepared writing paper has the following advantages: (1) the color of the paper surface is light yellow, the luster and color are soft, and the myopia can be effectively prevented; (2) the writing on the paper is fluent, the phenomenon of ink dispersion and fading is avoided, and the color is stable even after a long time preservation; (3) the growth of harmful bacteria on the paper is inhibited, and thus the health of users is guaranteed.
Owner:川印文化集团股份有限公司

Dust-free colored magnetic powder writing blackboard

The invention relates to a dust-free colored magnetic powder writing blackboard, which comprises a magnetic blackboard, colored magnetic powder, a colored powder writing pen and a magnetic powder wiper, wherein a uniform magnetic field is arranged on the surface of the magnetic blackboard; the colored magnetic powder consists of three basic colors, namely red, green and blue as well as white; a rolling ball is arranged in the colored powder writing pen; a baffle and a spring are arranged behind the rolling ball; and the rolling ball is produced by attaching a micro steel ball to the spherical surface of a large steel ball. The invention has the beneficial effects of no raise dust, distinct handwriting, smoothness for writing, little effort for wiping and no reflection for board surface; the magnetic powder can be reused, permanent benefits by one-time investment are realized; and the dust-free colored magnetic powder writing blackboard has all advantages of a traditional blackboard; and meanwhile, all defects of the traditional blackboard are overcome.
Owner:蒋裕美

Fountain pen ink smooth in writing

InactiveCN104151928AWrite fluentlyInk spread is smallInksP-PhenylenediamineFountain pen ink
The invention relates to fountain pen ink smooth in writing. The fountain pen ink is prepared through mixing the following ingredients in parts by mass: 25-40 parts of cis-1,4-polyisoprene, 1-2 parts of glycol, 1-3 parts of diphenylamine, 2-6 parts of sulfonated lignin, 2-6 parts of p-phenylenediamine, 1-4 parts of triethylene tetramine, 1-2 parts of sorbitol, 1-2 parts of glycerol, 1 part of sodium benzoate, 1-3 parts of carboxylic acid and 40-45 parts of pure water. The ink disclosed by the invention can be smoothly written on paper, is low in ink diffusion, can adapt to the writing of paper of multiple kinds and is good in writing effect.
Owner:HEFEI RUIXUE CHEM TECH

Water-based nano pigment-type gel pen ink and preparation method thereof

The invention relates to a water-based nano pigment-type gel pen ink and a preparation method thereof. The water-based nano pigment-type gel pen ink comprises the following components in percentage by weight: 20-40% of resin-free nano color paste, 10-30% of humectant, 0.1-3% of thickener, 0.2-3% of pH regulator, 0.05-0.5% of defoaming agent, 0.1-3% of lubricant, 0.2-2% of rust inhibitor, 0.2-2% of preservative and the balance of deionized water. The average particle size of the resin-free nano color paste is 100-250nm. The preparation method comprises the following steps: sufficiently stirring and uniformly mixing the components, and defoaming. By using the resin-free nano color paste, the ink has the advantages of favorable stability, proper viscosity, uniform particle fineness, smooth writing and uniform ink release without floating. The ink has the characteristics of bright color, light fastness, high water resistance and high stable quality after long-term storage, and can not have the phenomenon of stratification, precipitating deterioration or the like. The sand mill is used for grinding, so that the particle size of the pigment particles reaches nano scale. The preparation method is simple to operate and reasonable in technique.
Owner:SHANTOU WANHUI IND CO LTD

Waterproof type neutral ink with pigment in Nano level for pen, and preparation method

This invention provides a method for producing nanoscale pigment waterproof neutral pen ink, which comprises: nanoscale stock solution 40 wt. %, thickener 40-50 wt. %, and diluter 10-20 wt. %. The average particle size of the pigment is 100-200 nm. The method comprises: adding nanoscale stock solution into a blending pot, adding diluter under stirring, stirring for another 30-90 min, adding thickener, then stirring for 1-3 h, terminating stirring, and discharging. The ink has such advantages as good color, stable quality, fluent writing, high fatigue resistance, no demixing, separation or precipitation after a long-time storage, high solarization resistance, high waterproof performance, no toxicity, high production and usage safety, and no pollution. The ink can be widely used for metal ballpoint pen, polypropylene pen and plastic pen.
Owner:苏州三威纳米科技有限公司

Writing pen to which ink can be added repeatedly

The invention discloses a writing pen to which ink can be added repeatedly. The writing pen to which ink can be added repeatedly comprises a writing pen head, a pen head body, a pen rod body, a pen cap, an ink storage pipe, a piston in the ink storage pipe, a pen rod sealing cap and a pen head sealing cap, and is characterized in that the ink storage pipe is arranged in the pen rod body, the piston is arranged in the ink storage pipe, rubber sealing rings are arranged in inner thread connecting ports in two ends in the pen rod body respectively, one inner thread connecting port in the pen rod body is in butting connection with an outer thread connecting port of the pen rod sealing cap, the inner thread connecting port at the other end in the pen rod body is in butting connection with an outer thread connecting port of the pen head body, the pen head body is provided with a pen head connecting port used for installing the writing pen head, the pen head connecting port is communicated with an inner cavity of the pen head body, the inner cavity of the pen head body is communicated with the ink storage pipe, and the pen cap is provided with the pen head sealing cap matched with the writing pen head, so that the writing pen to which the ink can be added repeatedly is formed. The writing pen to which the ink can be added repeatedly has the advantages that when the ink in the ink storage pipe is used up, the pen head body is detached down, the ink storage pipe is filled with ink again, the pen head body is installed again, and finally the ink pen can be used normally. The writing pen to which the ink can be added repeatedly is simple in structure, smooth in writing, durable and capable of replacing various writing pens such as a disposable gel pen, a whiteboard pen, a mark pen, an art pen and a pen with defects, and becomes a novel replaceable writing pen which is environmentally friendly, cheap and durable.
Owner:DONGGUAN MOHAI WRITING CO LTD

Integrated intelligent teaching equipment

The invention discloses integrated intelligent teaching equipment. The equipment comprises a touch control panel and a writing board, the touch control panel is arranged on a first frame, the writingboard is arranged on a second frame, the writing board and the touch control panel are connected with each other through the first frame and the second frame which are arranged between the writing board and the touch control panel, and the first frame and the second frame are fixedly arranged through sheet metals; the touch control panel comprises the writing board, a first substrate, touch control film, a second substrate and a display screen, wherein a second adhesive layer is arranged between the second substrate and the touch control film, the writing board comprises a support plate and writing film, the writing film comprises a base material, a matte coating layer and an adhesive layer, the adhesive layer is uniformly arranged on one side surface of the base material, the matte coating layer is arranged on the other side surface, opposite to the adhesive layer, of the base material, and one face, provided with the adhesive layer, of the base material is in contact connection withthe support plate. The integrated intelligent teaching equipment has the advantages that large-scale touch control interaction setting is integrated with a traditional blackboard system, thereby enriching the connotation of the blackboard, and satisfying new requirements of the modern teaching on the blackboard.
Owner:UC NANO TECH CO LTD

Watercolor pen ink and preparation method therefor

The invention discloses watercolor pen ink which is prepared from the following components in percentage by weight: 2-10% of a natural colorant, 2-15% of a viscosity modifier, 2-15% of a humectant, 0.01-0.5% of a preservative and the balance of deionized water and other auxiliaries, wherein the natural colorant or main components thereof are extracted from fruits, leaves, flowers and stems of plants. The watercolor pen ink disclosed by the invention is prepared from raw materials which are natural plant dyes and non-toxic substances. The watercolor pen ink is various in color, environmentally-friendly, non-toxic, low in price and simple in formula. The preparation method for the watercolor pen ink disclosed by the invention is simple and convenient in process. The watercolor pen ink prepared by the formula and the method is bright in color, stable in performance and smooth to write with.
Owner:QINGDAO CHANGLONG STATIONERY

Method for making environment-friendly and easily-erased liquid ink for teaching and writing and color paste used therein

InactiveCN102146232AWrite fluentlyWriting and erasingInksPigment pastesWater storageWhiteboard
The invention discloses a method for making environment-friendly and easily-erased liquid ink for teaching and writing. The method is invented in order to completely solve the problem of serious writing dust pollution of the traditional teaching blackboards in general domestic schools. The liquid ink comprises a resin, a pigment, an assistant, a solvent and the like. By adopting a writing pen (a water storage refill type and a direct liquid type) filled with the writing liquid during writing on white boards or colorful boards (applicable to both high gloss and low gloss) like enamels, baking finish, plastic laminated articles and the like, liquid ink disclosed by the invention has the advantages of smoothness of writing, easiness of erasing, no dyeing on board, no dust pollution and the like. The students can be kept with good visual psychological states due to soft tactility and various colors, and thus the liquid ink can be used for a long time without damaging visions of the students.
Owner:谢立华

Colored pencil lead and preparation method thereof

The invention provides a colored pencil lead and a preparation method thereof. The colored pencil lead comprises components in parts by mass as follows: 62-73 parts of sodium thiosulfate, 13-20 parts of a color developing agent, 7-15 parts of CMC (carboxy methylated cellulose) and 0-8 parts of kaolin, wherein the color developing agent consists of sodium carbonate and an acid-base indicator. The preparation method of the colored pencil lead includes steps of weighing the raw materials in proportion, mixing sodium carbonate and the acid-base indicator, adding absolute ethyl alcohol dropwise and mixing to a heavy paste, then pouring molten sodium thiosulfate in and stirring evenly, adding CMC and kaolin, stirring evenly, pouring into a die, drying, and taking out. The provided colored pencil lead can fade both when the lead meets water and when the lead is placed in the air for a long time, is easy to wash when adhering to hands or clothes, is non-residual, non-toxic and harmless, and is suitable for occasions where long-stem storage is not needed, such as temporary marking, calligraphy and painting exercise, and the like.
Owner:浙江奥乐奥新材料科技有限公司

Green ink capable of fading by hydrolyzing and preparation method thereof

The invention provides green ink capable of fading by hydrolyzing and a preparation method thereof. The green ink comprises the following components in percent by weight: 1%-5% of p-nitrophenol, 1%-6% of sodium hydroxide, 80%-92% of water, 1%-5% of urea, 1%-4% of glycerol, 0.1%-1% of formaldehyde, 0.05%-0.5% of hydroxyethyl cellulose, 0.5%-3% of fatty alcohol-polyoxyethylene ether sodium sulfate, 0.5%-5% of thymolphthalein blue complexing agent, and 0.5%-3% of triethanolamine. The ink can be quickly faded to be colorless while meeting water under a neutral condition, can be used as ink for white board teaching and writing, and also can be used as writing and drawing ink for children. The ink disclosed by the invention is easy in obtaining materials, simple in preparation method, bright in color, long in color holding time; and handwriting can be directly erased out by water without marks, so that board surface is not contaminated.
Owner:山西奇色环保科技股份有限公司
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