Sheet printed with invisible inks
AssigneesLockley Services Pty. Ltd., Graham Charles Barry, Norman John Field
InventorRoderick P. J. Tomlinson
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Abstract
The invention relates to a developable surface comprising a carrier layer having thereon at least two deposits of one or more invisible inks in adjacent or overlapping relationship, said deposits in the developed state being unresolvable.
Claims15
A developable surface comprising a carrier layer capable of accepting print and having printed thereon in a predetermined pattern a plurality of individual deposits of at least two different invisible inks in adjacent and intermingling relationship, said individual deposits in the developed state not being optically resolvable as different colors, and with said plurality of deposits being optically resolvable as a blended color of the said different inks.
Dependencies are inferred from the claim text.