Patent ID: 7105350

Claim:
A method for evaluating the integrity of a closure on a hot-filled light transmissive container having an interior and an exterior and wherein the hot-filled light transmissive container is subjected to a pressurized spray of a cooling medium, comprising: providing the cooling medium with an effective amount of a fluorescing dye composition having a fluorescing agent; spraying the hot-filled light transmissive container with the cooling medium having the fluorescing dye composition; rinsing the exterior of the hot-filled light transmissive container to remove substantially all fluorescing agent therefrom; subjecting the hot-filled light transmissive container to ultraviolet light to activate any fluorescing agent that may have migrated past the closure to the interior of the hot-filled light transmissive container; and viewing the hot-filled light transmissive container to determine the presence or absence of activated fluorescing agent.