▎ 摘　　要

NOVELTY - The device (10) has a ferrite material (18) arranged to block a predetermined radio frequency. A metal layer blocks the predetermined radio frequency. A carbon nanotube and graphene hybrid (16) are arranged to block of the predetermined radio frequency. The ferrite material, the metal layer and the carbon nanotube and graphene hybrid are located between outer layers. The ferrite material and the carbon nanotube and graphene hybrid are located in an adhesive. USE - Card shielding device for impeding passage of signals at a predetermined radio frequency. ADVANTAGE - The device prevents RF signals from a radio-frequency identification reader to a tag, thus preventing a tag being activated, and hence preventing transmission of information carded by the tag. The device inserts a shield into a book, so that the RF signals are blocked. The device is removed from the book at time of reading in an easy manner without interference. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a book comprising page to embed a machine readable chip. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a card shielding device. Card shielding device (10) Carbon nanotube and graphene hybrid (16) Ferrite material (18)