专利名称：Water-metachromatic laminate, and process
for its production
发明人：Akio Nakashima,Hisayoshi Kato申请号：US10819228申请日：20040407
公开号：US20040185234A1公开日：20040923
摘要：On a support, a porous resin layer which is opaque in a water-unabsorbed stateand 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 orareas in a co-existent state, to make up a water-metachromatic laminate. A novel toyelement can be provided in which latent images standing invisible in a normal conditionare rendered visible by means of water as a medium so as to be visually distinguished.
申请人：THE PILOT INK CO., LTD.
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