CAJ | 학술논문

在印刷中，白色油墨通常作为打底油墨，白墨的遮盖力对表层图文再现起着关键性作用。油墨分散性是影响其遮盖力的重要因素之一。为了探讨油墨分散性与遮盖力的关系，通过改变油墨制备工艺，制备分散性不同的白色水性油墨样品。测试油墨的粒径大小及其分散状态，将油墨涂布在遮盖力测试纸上，测试遮盖力以及墨膜表面形貌，分析白色水性油墨分散性对遮盖力的影响。实验结果表明：分散性好的油墨颜料颗粒分散均匀，没有团聚现象，遮盖力好；反之较差。
재인쇄중，백색유묵통상작위타저유묵，백묵적차개력대표층도문재현기착관건성작용。유묵분산성시영향기차개력적중요인소지일。위료탐토유묵분산성여차개력적관계，통과개변유묵제비공예，제비분산성불동적백색수성유묵양품。측시유묵적립경대소급기분산상태，장유묵도포재차개력측시지상，측시차개력이급묵막표면형모，분석백색수성유묵분산성대차개력적영향。실험결과표명：분산성호적유묵안료과립분산균균，몰유단취현상，차개력호；반지교차。
The white ink commonly serves as render ink in printing, and it’s covering property (CP), which is assumed to be influenced by the dispersion, plays a key role in color re-production on the film surface. In order to research on the relations between dispersivity and CP, inks with different dispersion are prepared by changing the preparation process. The ink’s particle size and distribution are tested before it is coated onto the surface of covering property test paper. The morphologies of inks film are studied through SEM to examine the white ink’s dispersion and its influence on CP. The result shows that well dispersed inks have fine particle size and tend to uniformly distribute. There is hardly any agglomeration found on the well dispersed ink’s SEM image which is supposed to account for its high CP. By contrast, inks with poor dispersion scatter unevenly and large agglomerations are observable on its SEM image, their dispersion state and ag-glomerations lead to its poor performance of CP.