Multi-layer, light markable media and method and automatic and manually operated apparatus for using same

Abstract

A multi-layer laminate media is provided on which information may be applied in machine or human readable form on a visible front surface by the output of one or more lasers, or other high intensity light source. In a preferred embodiment, the media has three layers including preferably transparent substrate, a thermochromic layer and a light absorbent layer located intermediate the media substrate and the thermochromic layer. The light absorbent layer is adapted to absorb light from the light source and convert the absorbed light into heat. The heat is immediately conducted into selected portions of the thermochromic layer which is in thermal contact with the light absorbent layer, causing portions of the thermochromic layer to change visual appearance such as color to create the desired mark. The media optimally includes obscuration materials to reduce the visibility of the light absorbent layer to the naked eye. The light absorbent layer absorbs light in the NIR and visible light wavelength ranges of light and is preferably a low cost absorber such as carbon black. The invention also includes a manually operated produce labeling system utilizing the multi-layer laminate media. A rewinder is also provided which utilizes the multi-layer laminate media.