Inventors:
Robert E. Miller - Dayton OH
Robert W. Brown - Dayton OH
Paul S. Phillips - Dayton OH
Assignee:
NCR Corporation - Dayton OH
International Classification:
B32B 516, B32B 2700
Abstract:
A colorless liquid ink is provided which yields a distinctive marking color on exposure to normal environmental conditions of temperature and pressure as when used for writing on a sheet of plain paper. This ink may be encapsulated to give pressure-rupturable microcapsules. Autogenous, pressure-sensitive record materials are provided by incorporation of such microcapsules in or on sheets of paper for use singly or in manifold duplicating systems which respond to printing-pressures applied by un-inked printing members.