Erasable ink composition containing a polymer-encapsulated colorant obtained by polymerizing monomer in the presence of solid colorant particles
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United States of America Patent
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Dec 22, 1998
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app pub date -
May 20, 1996
filing date -
Dec 21, 1994
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Abstract
An erasable ink composition contains a dispersion of solid particles of water-insoluble polymer-encapsulated colorant obtained from the emulsion polymerization of at least one emulsion-polymerizable monomer in the presence of solid colorant particles. The ink is intended for use in any of a variety of marking instruments, in particular, a ball-point pen.
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