CN1126229A

CN1126229A - Quick character-eliminating ink and writing board

Info

Publication number: CN1126229A
Application number: CN 94111189
Authority: CN
Inventors: 姚昌发
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-29
Filing date: 1994-09-29
Publication date: 1996-07-10

Abstract

The writing board is made up by coating fibrous board with one or more substances, and the ink is prepared from one or more other substances. They feature that when said ink is used to write on said writing board, the characters are displayed in different colours for a certain time and then automatically disappear without erasing them, so it is suitable for education and writing exercise.

Description

Quick character-eliminating ink and book plate

The present invention relates to a kind of teaching of culture apparatus, specifically a kind ofly be used for teaching board or the quick character-eliminating ink and the book plate of usefulness are write in exercise.

For a long time, the teacher uses chalk writing in teaching, and chalk can produce a large amount of chalk dusts when writing and wipe, to teachers and students, particularly teacher healthy brought great infringement, for addressing this problem, people want to have use up thousand and one way, but effect is undesirable.As dust-free chalk, still can produce a spot of dust, and want wiping board after the writing on the blackboard; In addition, when the student learns experienced Brush calligraphy, need repeat, can consume a large amount of paper like this, and prepared Chinese ink can cause certain pollution.

Purpose of the present invention is exactly will provide a kind of can effectively improve teacher's teaching condition, makes teachers and students not eat chalk dust, and without the automatic erasion of wiping meeting, simultaneously, the quick character-eliminating ink and the book plate of a large amount of conserves paper of energy when writing practising.

The object of the present invention is achieved like this: one or more materials are coated in make the book plate on the fiberboard, making aqua with another or several material is that ink sucks in the pen.In writing on the blackboard or when writing, the thing that is coated with on the book plate touches material in the interior aqua, causes change in color because of physicochemical change takes place, and demonstrates the writing of different color and can disappear automatically in the regular hour.It is relevant with the interior aqua composition of pen that the time that the color of this writing and writing disappear and book plate are coated with thing, relevant with the concentration of temperature, humidity, material and the potential of hydrogen of solution etc.By the composition in thing and the aqua of being coated with on the change book plate, can produce and to show monochromatic, double-colored, pleochroic book plate and write the water-color paintbrush that presents different colours on the plate not ibideming, or with the homochromy different time disappearance of plate, with the book plate and the water-color paintbrush of the not homochromy different time disappearance of plate.For example, the acid base indicator that one or more are different is coated on the fiberboard (plank, cardboard or cloth) and makes the book plate, aqua with one or more different PH sucks in the different pens, when with a writing on the blackboard or when writing, can write out the word of one or more different colors, and (in several minutes to a hour) cancellation automatically in the limited time.

Using quick character-eliminating ink and book plate, is the once change of writing cultural goods, loses chalk, makes teachers and students take leave of chalk dust, useful teachers and students' physical and mental health; Writing on the blackboard need not be wiped, and it is more convenient to save trouble, and can strive for more instructional blocks of time, and the word time that disappears lacks, thereby has improved the utilization ratio of book plate on the classroom.The student is used to the little book plate that writes, work out a draft, calculate, can use repeatedly, has both saved paper, has protected classroom environment not polluted by waste paper again, does not use traditional prepared Chinese ink, also helps student's Personal hygiene.Advantages such as the present invention has also that manufacture method is simple, raw material is easily purchased, with low cost, easy to use, the huge market demand.

Embodiment:

Example one: the book plate is made: get in the ethanol that 1 gram Bromothymol blue is dissolved in 1 liter 95%, then it is coated on the fiberboard, be the stroke book plate after the seasoning.

The aqua preparation: with the ammonia soln of ammoniacal liquor preparation PH=8, a little adds wherein with the Bromothymol blue ethanolic soln again, is blue quick character-eliminating ink.

Word disappears the time: about 6 minutes kinds under the room temperature.

Example two. the book plate is made: get in the ammonia soln that 1 gram o-cresolsulfonphthalein is dissolved in 1 liter 0.6%, then it is coated on the fiberboard, be the stroke book plate after the seasoning.

The aqua preparation: with the ammonia soln of ammoniacal liquor preparation PH=9, a little adds wherein with the o-cresolsulfonphthalein ammonia soln again, is red quick character-eliminating ink.

Word disappears the time: under the room temperature about 4 minutes.

Example three. the book plate is made: be coated on the fiberboard after the book plate in example one, the example two is coated with the mixing in 1: 1 by volume of thing solution, be the stroke book plate after the seasoning.

Aqua preparation: preparing pH value respectively with ammoniacal liquor is two kinds of ammonia solns of 8 and 10, adds a little book plate respectively and be coated with the thing mixing solutions in the ammonia soln of these two kinds of different PH, is green and purple quick character-eliminating ink.

Word disappears the time: under the room temperature about 3 minutes.

Claims

1. quick character-eliminating ink and book plate, it is characterized in that one or more materials are coated in and make the book plate on the fiberboard, making aqua with another or several material is that ink sucks in the pen, in writing on the blackboard or when writing, the thing that is coated with on the book plate touches material in the interior aqua, cause change in color because of physicochemical change takes place, the writing that demonstrates different color also can disappear within a certain period of time automatically.

2. quick character-eliminating ink according to claim 1 and book plate, it is characterized in that one or more acid base indicators are coated in and make the book plate on the fiberboard, aqua with one or more different PH sucks in the different pens, when with a writing on the blackboard or when writing, can write out the word of one or more different colors, and can in finite time, disappear automatically.

3. quick character-eliminating ink according to claim 1 and 2 and book plate is characterized in that described fiberboard can be plank, cardboard, cloth etc.