Mechanically writing possibility and you read mechanically and the possible sheet product, and the manner which retains its digital recording data and the manner null which

摘要

Provision of [challenges] multilayer sheet product. Activatable sheet material is provided magnetically with outer sheets stacked SOLUTION: A one-to-one sheet is provided with a pigment / binder undercoating on the inner surface at least, the binder matrix between the outer sheet There is a magnetic layer containing particles activatable magnetically therein, the outer sheet having sufficient opacity to mask the appearance of the magnetic layer.