发明名称 |
RECORDING MATERIAL CONTAINING ASBESTOS |
摘要 |
<p>A recording sheet consisting mainly of fibrous material is capable of displaying a colored image when contacted under pressure with substantially colorless crystal violet lactone and similar dye precursors if at least 3% of the fibrous material is constituted by uniformly distributed asbestos fibers. Sheets having adequate strength for carbonless copying should not contain more than 30% asbestos fibers. Stronger colors are obtained if the sheet further contains a mixture of ?-alumina and ?-alumina precursors in an amount of 2% to 20% of the weight of the fibrous material, the mixture containing 1% to 30% water volatile at 1000.degree.C, and being converted substantially entirely to ?-alumina when heated from 300.degree. to 1000.degree.C.</p> |
申请公布号 |
CA1082459(A) |
申请公布日期 |
1980.07.29 |
申请号 |
CA19770270013 |
申请日期 |
1977.01.19 |
申请人 |
FELDMUEHLE AKTIENGESELLSCHAFT |
发明人 |
DESSAUER, GUIDO;RIECKE, KURT;WIRNITZER, FRANZ;RAMLOW, KURT |
分类号 |
B41M5/145;B41M5/155;(IPC1-7):32B5/16;41M5/16 |
主分类号 |
B41M5/145 |
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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