G - Physics – 09 – F
Patent
G - Physics
09
F
G09F 3/00 (2006.01) B31D 1/02 (2006.01) G09F 3/02 (2006.01)
Patent
CA 2580596
An identification label changes color in an irreversible manner once put into contact with water/humidity. The label has a water-absorbable paper-based substrate having a surface on which an ink zone formed by printing of water-repellent or hydrophobic ink thereon and an opposite second surface on which a coating layer is formed. The ink zone has a color substantially identical to color of the substrate. The coating layer contains water soluble substance, which dissolves into water to form a solution that, once being absorbed by the substrate, changes the color of the substrate, the color of the solution being different from that of the substrate. A layer of adhesive is formed below the coating layer. Alternatively, the coating layer is formed on a surface of a double-sided adhesive layer and is bonded to a surface of the substrate opposite to the surface on which the ink zone is formed.
E&i Marketing Consultant Co. Ltd.
Macpherson Leslie & Tyerman Llp
LandOfFree
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