The invention relates to a sign blank (1) for a novel retroreflective sign (50) which has a sign panel (10), a retroreflective film (12) and at least one visually perceptible security feature (20). The invention also relates to a method for producing such a blank, and to a novel retroreflective sign (50) comprising a legend and a visually perceptible security feature (20), and to a method for producing such a sign.
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