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Establishing Standards for Color and Print Quality in Large Format Inkjet Printing

机译：建立大幅面喷墨打印的颜色和打印​​质量标准

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摘要

Large format inkjet printing systems have evolved over the last decade and now offer high levels of speed and print and color quality. There are, however, no established standards or test protocols with which to evaluate this technology, and users must rely on manufacturers' marketing claims and counter claims. Wide and grand format devices may use solvent inks, UV-curable inks (cured via exposure to ultra-violet light), or latex ink. The media typically used by this category of device range from card stock to cast or calendared vinyl to rigid media. Inks used may be CMYK (cyan, magenta, yellow, black), light inks, metallic, or white. Viewing distances for these products range from point of purchase to greater distances for street signs, banners, and billboards. This research first identifies test areas that are relevant to this type of printing system; next, test procedures are developed; and finally, practical testing using commercially available large format roll to roll and flatbed inkjet printing systems is conducted. The aim of this research is to provide real practical data from the field as input to the ISO committee that is developing ISO 15311 that relates to Large Format Signage Printing. As part of the IDEAlliance Inkjet RoundUP, 24 sets of different print samples were obtained from the following supplier companies: Agfa, Durst, EFI, Epson, Fujifilm, HP, Mimaki, Mutoh, Oce, Roland, and Seiko. Tests were conducted for different test areas including color gamut, color management accuracy, print uniformity, repeatability from day to day, CMYK cross-hair registration, ink consumption, print speed, rub resistance as it relates to floor graphics, and weathering as applicable for outdoor signage. Individual test results are presented, and while we do not seek to create "winners" and "losers", we seek to identify achievable and appropriate "pass/fail" metrics for international standards and local certification/validation programs. In general, for color management, for example, we see that the systems produced extremely accurate color accuracy and are able to match GRACoL to within 1-2 CIEDE2000. This research also seeks to identify a color characterization data set that can accurately represent the color characteristics of wide format inkjet printing. There exist well-established data sets for offset and gravure printing (for example SWOP, FOGRA, Japan Color), but there are no accepted data sets for large format inkjet printing. One standard being developed, ISO 15339, proposes Characterization Reference Print Condition 7 (CRPC 7) for "Extra large gamut printing processes". In this research, we evaluate the applicability of using CRPC 7 to represent the color response of commercial large format inkjet printing systems.
机译：在过去的十年中，大幅面喷墨打印系统得到了发展，现在可提供高水平的速度，打印和色彩质量。但是，尚没有评估该技术的既定标准或测试协议，用户必须依靠制造商的市场声明和反声明。宽幅和大幅面设备可以使用溶剂墨水，可紫外线固化的墨水（通过暴露在紫外线下固化）或乳胶墨水。这类设备通常使用的介质范围从卡片纸到铸模或压延乙烯基到刚性介质。使用的油墨可以是CMYK（青色，品红色，黄色，黑色），浅色油墨，金属或白色。这些产品的观看距离范围从购买点到路牌，横幅和广告牌的更大距离。这项研究首先确定与此类打印系统相关的测试区域；接下来，制定测试程序；最后，使用市售的大幅面卷对卷和平板喷墨打印系统进行了实际测试。这项研究的目的是提供该领域的实际数据，作为正在开发与大幅面标牌印刷相关的ISO 15311的ISO委员会的输入。作为IDEAlliance Inkjet RoundUP的一部分，从以下供应商公司获得了24套不同的印刷样品：爱克发（Agfa），达斯特（Durst），EFI，爱普生（Epson），富士胶卷（HP），Mimaki，Mutoh，Oce，Roland和精工（Seiko）。针对不同的测试区域进行了测试，包括色域，颜色管理准确性，打印均匀性，日常可重复性，CMYK十字准线定位，墨水消耗，打印速度，与地板图形相关的耐擦性以及适用的耐候性户外标牌。给出了单独的测试结果，尽管我们不寻求创造“优胜者”和“失败者”，但我们寻求为国际标准和本地认证/验证计划确定可实现且适当的“通过/失败”指标。通常，例如对于色彩管理，我们看到这些系统产生了极其精确的色彩精度，并且能够将GRACoL匹配到1-2 CIEDE2000之内。这项研究还试图确定可以准确代表宽幅喷墨打印的颜色特征的颜色特征数据集。存在用于胶版印刷和凹版印刷的成熟数据集（例如SWOP，FOGRA，Japan Color），但是对于大幅面喷墨打印没有公认的数据集。正在开发的一个标准ISO 15339提出了“超大色域打印过程”的特征参考打印条件7（CRPC 7）。在这项研究中，我们评估了使用CRPC 7代表商业大幅面喷墨打印系统的色彩响应的适用性。

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  • 来源
    《Journal of Imaging Science and Technology》 |2014年第3期|030504.1-030504.13|共13页
  • 作者

    Abhay Sharma; Xiaoying Rong;

  • 作者单位

    School of Graphic Communications Management, Ryerson University, Toronto, Canada;

    Graphic Communication Department, California Polytechnic State University;

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  • 正文语种 eng
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