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发明公开
CN105542555A 色变指示装置及透明油墨 有权

色变指示装置及透明油墨
摘要：
本发明涉及一种色变指示装置及透明油墨。一种色变指示装置包括基底层、形成于所述基底层表面的指示层，所述指示层包括指示部，所述指示部由氧气敏感的指示油墨印刷形成，所述色变指示装置还包括覆盖于所述指示部表面的保护层，所述保护层由透明油墨印刷形成，其特征在于，所述透明油墨包括还原剂、粘结剂及溶剂，所述还原剂选自连二亚硫酸盐、硫代硫酸盐、亚硫酸氢盐、亚硫酸盐、硼氢化盐及抗坏血酸中的至少一种，所述粘结剂选自明胶、羟乙基纤维素、聚乙烯醇缩丁醛、乙基纤维素、醋酸纤维素、聚乙烯吡咯烷酮、聚环氧乙烷和聚甲基丙烯酸甲酯中的至少一种，所述透明油墨的pH值与所述指示油墨的pH值相同。上述色变指示装置能有效避免指示部的pH值发生偏差。
摘要（英）：

The invention relates to a color change indicating device and transparent ink. The color change indicating device comprises a substrate layer and an indicating layer formed on the surface of the substrate layer. The indicating layer comprises an indicating portion which is formed by printing of indicating ink sensitive to oxygen. The color change indicating device further comprises a protective layer covering the surface of the indicating portion. The protective layer is formed by printing of the transparent ink. The color change indicating device is characterized by further comprising a reducing agent, a binding agent and a solvent. The reducing agent is selected from at least one of hyposulphite, thiosulfate, hydrosulphite, sulfite, borohydride salt and ascorbic acid. The binding agent is selected from at least one of gelatin, hydroxyethyl cellulose, polyvinyl butyral, ethyl cellulose, cellulose acetate, polyvinylpyrrolidone, polyethylene oxide and polymethyl methacrylate. The pH value of the transparent ink is the same as that of the indicating ink. The color change indicating device can effectively prevent deviation of the pH value of the indicating portion.

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