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Abstract
With the widely development of digital printing technology and the enhancement of environmental awareness, more and more people in digital printing industry pay attention to environmentally friendly water-based ink. Water-based ink is a kind of dispersed system that made of pigment particles, water, resin and various additives, and dispersion is one important factor that affects the rheological properties of ink. In order to explore the influence of the dispersion of pigment on the rheological properties of water-based ink, we change the grinding time and the ratio of pigment to resin to prepare ink samples with different dispersion state. The particle size distribution of the samples is tested by laser particle size analyzer and the rheological parameters such as viscosity and thixotropy, of the samples are tested by ARES rheometer, and analyze the effect of dispersion on rheological properties of ink. The experiment results show that the ratio of pigment to resin influences the dispersion state seriously, at the same time dispersion state has a great influence on the rheological properties.
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