All Purpose Invisible Blue UV Blacklight Reactive Ink (2 Ounce Bottle)

Color: Blue, Features:, Invisible in regular light, glows bright blue in blacklight. The colors really pop in ultraviolet light but are undetectable

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Opticz All Purpose Invisible Blue UV Blacklight Reactive Ink (2 Ounce Bottle) : : Office Products

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Opticz All Purpose Invisible Blue UV Blacklight Reactive Ink

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Opticz All Purpose Invisible Blue UV Blacklight Reactive Ink (2 Ounce Bottle) : : Office Products