专利名称：Coaster for glass发明人：Kawashima, Kiyoharu申请号：EP90110944.7申请日：19900609公开号：EP0428823A2公开日：19910529
专利附图：
摘要：A coaster (1) comprises an upper sheet (2) having transparency and
permeability, a printed sheet (4) provided with a color-changing area facing the uppersheet, and a color former (5) for changing the color-changing area. The color-changingarea is printed by an ink containing a color-changing agent which changes from
substantially invisible colorless state to a visible color state by applying a color former.The color former is set in the coaster such a way that the color former can melt out forapplying to the color-changing agent by means of water permeating through the uppersheet.
申请人：Kawashima, Kiyoharu
地址：5-7, Esakacho 5-chome Suita-shi Osaka-fu JP
国籍：JP
代理机构：Türk, Gille, Hrabal, Leifert
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