Water-metachromatic laminate, and process for its production

Details Water-metachromatic laminate, and process for its production Water-metachromatic laminate, and process for its production

2005-11-15

2005-11-15

Dye, Rena (Department: 1774)

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

C428S036100, C428S036200, C428S195100, C428S201000, C428S320200, C428S321300, C428S322200, C428S323000, C428S324000, C434S393000, C434S396000, C106S031360, C106S031190, C503S201000

Reexamination Certificate

active

06964807

ABSTRACT:
On a support, a porous resin layer which is opaque in a water-unabsorbed state and capable of turning transparent in a water-absorbed state is formed, and also a water-repellent resin layer is so provided as to exist in the porous resin layer at its some area or areas in a co-existent state, to make up a water-metachromatic laminate. A novel toy element can be provided in which latent images standing invisible in a normal condition are rendered visible by means of water as a medium so as to be visually distinguished.

REFERENCES:
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patent: 4810562 (1989-03-01), Okawa et al.
patent: 5163846 (1992-11-01), Lee
patent: 5879443 (1999-03-01), Senga et al.
patent: 6416853 (2002-07-01), Nakashima et al.
patent: 6468088 (2002-10-01), Fujita et al.
patent: 1091039 (2001-04-01), None
patent: 58-199185 (1983-11-01), None
patent: 58199185 (1983-11-01), None
patent: 2-074688 (1990-03-01), None
The Concise Oxford Dictionary of Current English, Oxford University Press, pp. 1116 and 1171.

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