Method of producing color change in a web substrate
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United States of America Patent
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May 14, 2013
Grant Date -
Oct 27, 2011
app pub date -
Apr 23, 2010
filing date -
Apr 23, 2010
priority date (Note) -
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Abstract
The present invention relates to a method of producing a web substrate comprising an activatable colorant and at least one region comprising a topical additive. The web substrate is exposed to a first external stimulus producing a first activated color region. The first activated color region is subsequently exposed to a second external stimulus producing a second activated color region within the first activated color region. The second external stimulus is induced by application of the topical additive such that the second activated color region coincides with the topical additive region.
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