【摘 要】
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The rapid and widespread diffusion of digital printers is turning inkjet printing into the leading technology in ceramic tile decoration.The purpose of this overview is to outline the evolution of ink
【机 构】
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CNR-ISTEC,Istituto di Scienza e Tecnologia dei Materiali Ceramici,Faenza,Italy
【出 处】
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2015中国(景德镇)高技术陶瓷国际论坛暨第九届亚洲陶瓷材料研讨会
论文部分内容阅读
The rapid and widespread diffusion of digital printers is turning inkjet printing into the leading technology in ceramic tile decoration.The purpose of this overview is to outline the evolution of ink technology in the last decade and to highlight its role in the development of successful digital printing of ceramic tiles.As a matter of fact, quality and reliability of inkjet printing on ceramic surfaces depend to a large extent on ink performances.For this reason,technological requirements of inks extend well beyond the prescriptions of DOD printhead manufacturers, encompassing the storage, interaction with substrate and firing stages.The ink behaviour is theoretically governed by its density,rheological and surface properties in a wide and dynamic range of stress regimes.However, the peculiar conditions occurring in ceramic tile application have gradually drivento specific fields forink propertiesand performances, where particle size distribution, sedimentation rate, agglomeration phenomena and colour strength are particularly stressed.Furthermore, special attention must be paid to chemical compatibility of carriers and additives with the ink hydraulic circuit and printhead components.This situation hasgeneratedoriginal pathwaysin the criteria of ink formulation and pigment processing, entailingdifferent technological solutions concerning colorants, solvent/carriers and additives, that will be shortly reviewed.Relevant parameters (e.g., viscosity, surface tension, solid load, fluid mechanics dimensionless numbers: Reynolds, Weber, Ohnesorge) acting on stability over time, jettability, footprint formation and colouring performance will beoutlined and discussed to focus on peculiarities of ceramic ink technology and challenges for the next future.
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