| 发明名称 |
Sheet printed with invisible inks, developers and erasure compounds for invisible inks |
| 摘要 |
The invention relates to a developable surface comprising a carrier layer having thereon at least two deposits of one or more invisible inks in adjacent or overlapping relationship, said deposits in the developed state being unresolvable.
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| 申请公布号 |
US4477593(A) |
申请公布日期 |
1984.10.16 |
| 申请号 |
US19820353818 |
申请日期 |
1982.03.02 |
| 申请人 |
LOCKLEY SERVICES PTY. LTD.;BARRY, GRAHAM CHARLES;FIELD, NORMAN JOHN |
发明人 |
TOMLINSON, RODERICK P. J. |
| 分类号 |
B41M3/14;C09D10/00;C09D11/00;(IPC1-7):B41M3/14;B41M5/14 |
主分类号 |
B41M3/14 |
| 代理机构 |
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代理人 |
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| 主权项 |
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