Pressure-and-heat-sensitive copying paper
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United States of America
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Oct 11, 1983
Grant Date -
N/A
app pub date -
May 27, 1980
filing date -
Aug 1, 1972
priority date (Note) -
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Abstract
A heat or pressure sensitive copying paper is provided containing a fluoran compound as a color former, said color being developed in said heat or pressure sensitive copying paper through the application of heat or pressure, said fluoran compound being of the formula ##STR1## wherein R.sub.1 is halogen; R.sub.2 is hydrogen or methyl; R.sub.3 is hydrogen, methyl or ethyl; each of R.sub.4 is independently halogen or methyl; R.sub.5 is methyl or ethyl; and n is 0 or an integer from 1 to 4.
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