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Invisible in regular light, glows bright blue in blacklight Choose between 5 sizes discounted by quantity. 2oz, 4oz, 8oz, 16oz, and 32oz. Ideal for

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Brightly colored and highly visible in daylight. Glows incredibly bright in UV blacklight. Blacklight only. Does NOT glow in the dark! This is that

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Opticz All Purpose Invisible Blue UV Blacklight Reactive Ink (8 Ounce Bottle) : : Office Products

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