| Original document(6 pages) Authorized document(6 pages) 中文版 |
The present invention discloses an notebook capable of preventing myopia. It is characterized by that said invention uses yellowish paper containing yellow dyes of cold yellow G and alkali canary yellow O to make the yellowish paper produce yellowish brightness with 51%-59% and can reflect the colour light whose wavelength is 500-550 nm. The brightness of said paper and chromaticity of picture or image printed on the paper can be formed into enough contrast, so that it can produce optimum visual environment so as to can obtain the effect of preventing myopia. |
Application Number
申请号 |
02100388 |
Application Date
申请日 |
2002.01.21 |
| Title 名称 |
Notebook capable of preventing myopia |
Publication Number
公开号 |
1433893 |
Publication Date
公开日 |
2003.08.06 |
| Approval Pub. Date |
|
Granted Pub. Date |
2004.08.11 |
| International Classification 分类号 |
B42D1/00,B42D12/00,D21H21/14 |
Applicant(s) Name
申请人 |
Liu Dongzhan |
| Address 地址 |
110002 |
| Inventor(s) Name 发明人 |
Liu Dongzhan |
| Attorney & Agent 代理人 |
|
| More information 更 多 信 息 |
|
| Related patents information |
|
|
|
|
|
|