A REVERSIBLE INFORMATION CARRYING SYSTEM THAT TURNS FROM INVISIBLE TO READABLE

摘要

Cholesteric liquid crystals in microencapsulated form are applied as a background or as printed information as a part of a reversible information carrying system. The reversible information system is normally invisible under ambient conditions, while providing a highly contrasting background to a dataform symbology upon stimulation with appropriate forms of at least one of heat and light. The reversible information system is adapted for the demands of automated sorting systems.