目的 构建一种兼具可打印性、可触发显色性和多色显示能力的隐色油墨体系,并评估其应用性能。方法 以隐色红、隐色黄和隐色蓝为染料,采用聚氨酯树脂/乙醇体系制备隐色油墨,并结合Zn2+显色剂,开展流变性能、色度特性、多色打印、显色机理及环境稳定性测试。结果 3种隐色染料初始状态下呈无色或浅色,在Zn2+作用下发生开环显色。所制备油墨具有明显剪切变稀特性,适用于喷墨打印。显色后,3种油墨分别呈现红、黄、蓝等不同色调,具有良好的颜色区分度和多色显示能力。稳定性测试表明,该体系在高湿、高温和紫外条件下均保持较小色差变化,表现出较好的环境稳定性。结论 所构建的隐色油墨体系兼具良好的喷墨打印适配性、显色响应能力、多色显示性能和环境稳定性,在功能印刷、防伪标识和信息显示等领域具有应用潜力。
Abstract
The work aims to develop an invisible ink system that combines printability, color development triggering, and multicolor display capabilities, and to evaluate its application performance. Leuco-Red, Leuco-Yellow, and Leuco-Blue were used as dyes, and a polyurethane resin/ethanol system was used to prepare the invisible ink. Combined with Zn2+ color-developing agents, tests were conducted on rheological properties, chromatic characteristics, multicolor printing, color-developing mechanisms, and environmental stability. The three leuco dyes were colorless or lightly colored in their initial state and underwent ring-opening color development under the action of Zn2+. The prepared inks exhibited significant shear-thinning properties, suitable for inkjet printing. After color development, the three inks displayed red, yellow, and blue tones respectively, with good color distinction and multicolor display capability. Stability tests showed that the system maintained minimal color difference changes under high humidity, high temperature, and UV conditions, demonstrating good environmental stability. The constructed invisible ink system possesses good inkjet printing compatibility, color response ability, multicolor display performance, and environmental stability, showing potential for applications in functional printing, anti-counterfeiting labeling, and information display.
关键词
隐色油墨 /
喷墨打印 /
多色显示 /
环境稳定性 /
功能印刷
Key words
invisible ink /
inkjet printing /
multicolor display /
environmental stability /
functional printing
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基金
国家自然科学基金（22278037,62371051,61971049,62211530446）; 博士科研启动基金（Ed2025001）; 北京印刷学院平台建设项目（KYCPT202510）
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