Photochromic inks
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United States of America Patent
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Nov 17, 2015
Grant Date -
May 2, 2013
app pub date -
Oct 29, 2012
filing date -
Oct 27, 2011
priority date (Note) -
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Abstract
Metal deco ink formulations are improved by the use of fluorescent dyes, UV-absorbing dyes and/or IR-absorbing dyes. These may be premixed with a phenol-formaldehyde resin without microencapsulation to protect the dye from other ink ingredients that have chemistries which are incompatible with that of the dye, in order to obtain photochromic ink formulation with a good shelf life.
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