发明名称 |
RECORD MATERIAL CARRYING A COLOUR DEVELOPER COMPOSITION |
摘要 |
A colour developer for use in a pressure- or heat-sensitive record material comprises a particulate amorphous hydrated silica/hydrated alumina composite in which the hydrated silica and hydrated aiumina are chemically bound and in which the mean alumina content on a dried weight basis is up to 7.5%, based on the total weight of silica and alumina. The composite may be metal-modified, e.g. with copper. |
申请公布号 |
HK74684(A) |
申请公布日期 |
1984.10.12 |
申请号 |
HK19840000746 |
申请日期 |
1984.10.04 |
申请人 |
THE WIGGINS TEAPE GROUP LIMITED |
发明人 |
SHANTON, KENNETH JOHN |
分类号 |
B41M5/155;B41M5/333;(IPC1-7):41M5/12 |
主分类号 |
B41M5/155 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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