发明名称 |
Method for tinting hydrophilic plastic articles |
摘要 |
Tinted hydrophilic plastic articles, such as soft contact lenses, are prepared by carrying out the tinting operation while the hydrophilic material is still in its non-hydrated state. Tinting at this point avoids the need for use of swelling agents and also permits integration of the tinting procedure into an overall automated manufacturing operation. |
申请公布号 |
US4898695(A) |
申请公布日期 |
1990.02.06 |
申请号 |
US19880265523 |
申请日期 |
1988.11.01 |
申请人 |
PILKINGTON VISIONCARE HOLDINGS, INC. |
发明人 |
DOSHI, PRAFUL |
分类号 |
G02C7/04;B29D11/00;G02B1/04;G02C7/02;G02C13/00 |
主分类号 |
G02C7/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|