Spiro-naphtho-oxazine compound and photosensitive materials using the same
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United States of America Patent
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Jun 24, 1997
Grant Date -
N/A
app pub date -
Dec 27, 1994
filing date -
Dec 28, 1993
priority date (Note) -
Expired
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Abstract
A spiro-naphtho-oxaine compound having a specific substituent providing red color development which has been unknown in the past, and photosensitive materials containing the compound. Since the compound is superior in fatigue resistance and has a sufficient red color developing density, it is used in plastic articles, optical filters, recording materials, textiles, decoration materials, and toys, which change in color by light irradiation to develop a magenta color.
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