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Patent Searching and Data


Title:
WRITING BOARD
Document Type and Number:
Japanese Patent JPH11105490
Kind Code:
A
Abstract:

To allow an audience to sufficiently visually recognize writing content even in the case of using in an environment of darkness by sequentially laminating a writing layer having transparency, a light storage layer containing a high luminance long afterglow light storage pigment, and a white layer having high reflectivity in this order.

A writing layer 1 of the writing board has performance of writing by an aqueous or oily felt pen or the like and erasing by wiping, and transparency of the degree for not shielding emitting light radiated from a light storage layer 2. The layer 2 of the board is a layer for allowing an audience to sufficiently visually recognize a writing content on the layer 1 by emitting a light from the layer in a dark place. A white layer 3 of the board allows the audience to sufficiently visually recognize the content on the layer 1 by effectively utilizing the emitting light of the layer 2 by concentrating the light radiated from the layer 2 in the dark place to the layer 1 side.


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Inventors:
ONUMA TERUO
Application Number:
JP28279997A
Publication Date:
April 20, 1999
Filing Date:
September 30, 1997
Export Citation:
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Assignee:
KIMOTO KK
International Classes:
B43L1/04; B32B7/02; B43L1/08; B43L1/12; (IPC1-7): B43L1/04; B32B7/02; B43L1/08; B43L1/12