Record sheet for use in electro-coagulation method
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United States of America Patent
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May 15, 2001
Grant Date -
N/A
app pub date -
Dec 30, 1998
filing date -
Jan 7, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A record sheet for use in an electro-coagulation printing method, which comprises a base sheet and a layer provided thereon composed of at least one filler selected from the group consisting of alumina sol, boemite, pseudo boemite, synthetic amorphous silica, silica sol and colloidal silica and a binder, wherein said record sheet satisfies the following properties; (i) a wet time of the record sheet obtained from a liquid absorption curve of pure water measured by a dynamic scanning absorptometer being not more than 15 milliseconds, (ii) an absorption coefficient of the record sheet obtained from a liquid absorption curve of pure water measured by a dynamic scanning absorptometer being at least 10 ml/m.sup.2 s.sup.-1/2, and (iii) a contact ratio of the record sheet with the coagulated colloids measured by a specular reflection smoothness tester under a pressure of 40 kg/cm.sup.2 with a ray having a wavelength of 0.5 .mu.m being at least 40% and further, (iv) a Beck smoothness of the coating layer surface measured in accordance with JIS P 8119 being 250 seconds or more.
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