Systems and methods for creating optical effects on media
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United States of America Patent
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Feb 7, 2012
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N/A
app pub date -
Jul 1, 2005
filing date -
Jul 2, 2004
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Abstract
Methods and systems for optical effects in pigments, inks, and on media. One aspect of this disclosure involves a pigment particle which includes a core, having a fluorescent material and having a spherical shape, and a shell surrounding the core; the shell includes a photochromic material which has a first optical property in a first light source and a second optical property in a second light source which includes a set of wavelengths not sufficiently present in the first light source. The second optical property attenuates an emitted radiation from the fluorescent material. Other aspects are also described.
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