Abstract In this study we have evaluated the suitability of laboratory testing methods to predict inkjet printing results. We have developed and used testing liquids that are spanning the operational window of industrial High Speed Inkjet (HSI) printers while still covering the maximum possible range of viscosity and surface tension. First we correlated liquid penetration measured with ultrasound (ULP) and direct absorption (ASA) to print through from HSI prints. The best correlation ( R 2 ≈ 0.7{R^{2}}\approx 0.7) was found for the sized paper. For papers with increasing liquid penetration speed we found a decreasing ability of both testing methods to predict print through, for the strong absorbing paper the correlation drops to R 2 ≈ 0.2{R^{2}}\approx 0.2. Second we correlated contact angle and drop diameter to the dot area from HSI prints. Contact angle turned out to be a better predictor for printed dot area than drop diameter. Evaluating the change in contact angle over time we found the highest correlation to the dot area in the print when measuring the contact angle as soon as possible, in our case 1 ms after deposition of the drop on the paper. We also compared contact angle with microliter drops to picoliter drops, which are in the size scale of the actual inkjet droplet. To our great surprise correlations for microliter drops were equal or better than for picoliter drops, particularly for highly absorbing papers. Thus in order to predict dot spreading on paper our results suggest to measure the contact angle with microliter drops. Overall we found that, using laboratory testing methods, print through and dot spreading for HSI printing can be quite well predicted for slow absorbing papers but not very well for fast absorbing papers.

中文翻译：

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通过液体渗透和皮升接触角测量预测喷墨点扩散和印刷

摘要 在这项研究中，我们评估了实验室测试方法预测喷墨打印结果的适用性。我们开发和使用的测试液体跨越了工业高速喷墨 (HSI) 打印机的操作窗口，同时仍然涵盖了最大可能的粘度和表面张力范围。首先，我们将用超声波 (ULP) 和直接吸收 (ASA) 测量的液体渗透与 HSI 打印件关联起来。最佳相关性 (R 2 ≈ 0.7{R^{2}}\approx 0.7) 被发现用于指定尺寸的纸张。对于液体渗透速度增加的纸，我们发现两种测试方法预测打印透过的能力都在下降，对于强吸收纸，相关性下降到 R 2 ≈ 0.2{R^{2}}\约 0.2。其次，我们将接触角和液滴直径与 HSI 打印的点区域相关联。结果证明，接触角比液滴直径更能预测印刷点面积。评估接触角随时间的变化，我们发现在尽快测量接触角时与打印中的点区域的相关性最高，在我们的例子中是在液滴沉积在纸上后 1 毫秒。我们还比较了微升液滴和皮升液滴的接触角，它们是实际喷墨液滴的尺寸尺度。令我们惊讶的是，微升液滴的相关性等于或优于皮升液滴，特别是对于高吸收性纸。因此，为了预测纸上的点扩散，我们的结果建议测量微升液滴的接触角。总的来说，我们发现，使用实验室测试方法，