Capsule coating
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United States of America Patent
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Jul 19, 1994
Grant Date -
N/A
app pub date -
Feb 24, 1992
filing date -
Feb 24, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention discloses an improved coating for pressure-sensitive record material of the type comprising an aqueous slurry of binder and anionic microcapsules containing a color former and a solvent. The improvement comprises including in addition in the aqueous slurry an aluminum cation as a cationic metal salt in a concentration range of from about 0.15 parts of cation per 100 parts microcapsules to about 3.9 parts of cation per 100 parts microcapsules on a dry weight basis. Enhanced image intensity based on the active weight of coating used as measured by capsule solids is observed.
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