Tamper-indicating sheet

C - Chemistry – Metallurgy – 09 – D

Patent

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283/25, 117/6

C09D 5/00 (2006.01) A63F 3/06 (2006.01) B41M 3/14 (2006.01) B42D 15/00 (2006.01) B65D 33/34 (2006.01)

Patent

CA 1158104

ABSTRACT A normally opaque blush coating comprised of a mass of dispersed light-scattering polymeric particles in intimate con- tact with a minor amount of a binder composition, wherein the binder composition is adapted to collapse the coating and coalesce the polymeric particles into a normally translucent coating upon the application of either heat, or solvents selected from a wide spectrum of aromatic and aliphatic solvents. This form of blush coating susceptible to heat or to a wide spectrum of organic solvents finds use in the manufacture of lottery tickets. Such susceptibility reveals that solvent or thermal techniques have been used in tampering with the ticket or a pouch package in which the ticket is held. Such tampering is often the result of an illicit attempt to obtain information about the indicia printed on the ticket.

344492

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