Patent ID: 6292460
Filing Date: 2001-09-18
Classification: B41M,G02F,G09F

Abstract:
A re-usable information recording medium, comprising a sensitive layer, said sensitive layer including (a) an upper face and a lower face, (b) a plurality of particles having a magnetically responsive position, (c) a retaining material having a temperature dependent viscosity and in which said particles are embedded, wherein said viscosity decreases when temperature increases, and (d) a stiffening material partitioning the retaining material into a plurality of domains;a substratum, said sensitive layer being bound to an upper face of said substratum;a transparent protective layer bound to an upper face of said sensitive layer;wherein said particles and said retaining material exhibit at least respective first and second light absorption spectra which are different from each other, the particles comprising a ferromagnetic material and being selectively positionable in at least a first position adjacent the upper face of the sensitive layer and a second position adjacent the lower face of the sensitive layer; andsaid domains being placed side by side in a bidimensional matrix.