CN1061986A - White ink for teaching - Google Patents
White ink for teaching Download PDFInfo
- Publication number
- CN1061986A CN1061986A CN 91110758 CN91110758A CN1061986A CN 1061986 A CN1061986 A CN 1061986A CN 91110758 CN91110758 CN 91110758 CN 91110758 A CN91110758 A CN 91110758A CN 1061986 A CN1061986 A CN 1061986A
- Authority
- CN
- China
- Prior art keywords
- teaching
- white ink
- writing
- chalk
- blackboard
- 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
Abstract
The objective of the invention is to give provide in the teaching a kind of aqua, dustless, write conveniently, fluent and clear, economic writing on the blackboard material, as the writing on the blackboard material, can effectively avoid the chalk ash pollution classroom with it, avoid the infringement of chalk dust to instructor's health.
Description
The present invention relates to teaching board.
Existing teaching board uses is chalk, writing on the blackboard or when erasing the board, dust from flying pollutes the classroom, and the instructor is healthy in harm.In order to address this problem, people have developed " dust-free chalk ".But produce the too busy to get away terra alba of main raw material that dust-free chalk adopts, during writing on the blackboard, still do not reach the effect of " dustless ".
The objective of the invention is to provide in the teaching a kind of aqua dustless, write conveniently, fluent and clear, economic writing on the blackboard material, it can avoid the chalk ash pollution classroom effectively, avoids the infringement of chalk dust to instructor's health.
The object of the present invention is achieved like this: white ink is poured in the special ink writing on the blackboard pen, writes on board of education.
The proportioning raw materials of white ink for teaching:
Distilled water: 68%
Anatase titanium dioxide (or lithopone, titanium-calcium, titanox) 30%
Dispersion agent: 1%; Emulsifying agent: 1%
Method for making: after with a small amount of distilled water the titanium dioxide furnishing being starched earlier, be ground to dimension on the colloidal mill, again distilled water, dispersion agent and emulsifying agent mixed to transfer forming below 10 microns.
Claims (2)
1, white ink is poured in the writing on the blackboard pen, on board of education, writes.
2, white ink according to claim 1 is characterized in that being mixed to grind and being formed by titanium dioxide (or titanium-calcium, titanox, lithopone) and distilled water, dispersion agent, emulsifying agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91110758 CN1061986A (en) | 1991-11-10 | 1991-11-10 | White ink for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91110758 CN1061986A (en) | 1991-11-10 | 1991-11-10 | White ink for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1061986A true CN1061986A (en) | 1992-06-17 |
Family
ID=4910253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91110758 Pending CN1061986A (en) | 1991-11-10 | 1991-11-10 | White ink for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1061986A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094095C (en) * | 1996-07-25 | 2002-11-13 | 株式会社派拉特 | Magnetic moving display board |
-
1991
- 1991-11-10 CN CN 91110758 patent/CN1061986A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094095C (en) * | 1996-07-25 | 2002-11-13 | 株式会社派拉特 | Magnetic moving display board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |