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Advanced Barcode Technology Secret Barcode Cards feature hidden barcodes along all four edges of each card. Unlike infrared marked decks, these codes are invisible to the naked eye and cannot be detected with infrared glasses or lenses. When paired with …

Invisible Edge Technology Secret Barcode Cards are equipped with hidden barcodes along all four edges of each card. Unlike infrared marked decks, these codes are invisible to the naked eye and cannot be seen with infrared glasses or lenses. When …