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src="/uploads/image/20151230/20151230102228_8967.jpg" width="375" height="375" title="贵阳d印刷如何分别其a墨质量的好坏" alt="贵阳d印刷如何分别其a墨质量的好坏" /><br /> </span> </p> <p> <span style="font-size:16px;">    油墨是用?b>贵阳<a href="/supply/56.html" target="_blank">d印刷</a></b>的重要材料,它通过印刷图案、文字表现在承印物上油墨中包括主要成分和辅助成分Q它们均匀地؜合ƈl反复蝾制而成一U粘性胶状流体。由颜料、连l料和助剂和溶剂{组成。用于书刊、包装装潢、徏{装饰等各种印刷。随着C会需求增大,油墨品种和量也相应扩展和增ѝ?如何判断油墨质量的好坏呢Q深圛_刷厂雅丽彩给您支支招?/span> </p> <p> <span style="font-size:16px;">    q燥性:油墨的干燥速度通常会媄响印刯量,同时q会引发很多印刷故障Q如D印刷品背面粘脏,甚至会造成LU印h法正常进行。用h遍反映,国内油墨的干燥性对印刷品质量媄响很大,׃油墨的干燥不d出现印刷ơ品、废品,q燥性受季节和气候的影响较大{问题确实不容忽视?/span> </p> <p> <span style="font-size:16px;">    适印性:C印刷中,承印物的品种多了Q辅助耗材的种cd了,性能差异也较大,因此Q对油墨的要求也更ؓ复杂了。一般公司对油墨的适印性十分重视,Z保证油墨的机上印刷适性,保证油墨与各U耗材和承印物的适应性,l常与固定的几家油墨供应商保持联p,自qҎ要求告诉油墨供应商。如使用普通胶印a墨印刷铜版纸Ӟ铜版U印L图文颜色鲜艳Q光泽度?而用同样的a墨印刯涂纸Q则透印现象比较严重Q且光泽度下降,但市Zgq没有专门适用于轻涂纸的印ha墨,因而希望a墨厂能根据不同的承印材料Q特别是现在常用的新型材料,如轻涂纸Q研发相应的油墨?/span> </p> <p> <span style="font-size:16px;">  另外Q报C֍刷厂的设备不同,选择的a墨也有区别。印报机是上出墨方式Q对油墨的性能要求比较高,目前国内印报油墨的性能Q如变性、黏度等都不能完全符合要求。下出墨方式的印刯备,也存在糊版、带脏问题,而报U对囄和标题的要求又比较高Q因此需要a墨厂Ҏ实际情况Ҏa墨的相关性能q行调整。可见胶印a墨的适印性还有待于进一步调_如果每个用户都提出特D要求,油墨厂恐怕就无法应付了?/span> </p> <p> <span style="font-size:16px;">  E_性:对于印刷厂来Ԍ油墨的稳定性也关系到印品质量。有公司使用q一些在国内生的国外品牌a墨,管油墨配方与进口品相同,但由于国内a墨厂的生产条件和理水^与原油墨生厂存在一定差距,造成同一品牌和型L油墨性能有些差别。如用同LU墨Q按同样比例调墨Q却有明昄色差。国产a墨和q口油墨在a墨的着色性、环保性和q燥速度斚wq存在很大的差距Q且国油墨的流动性不好,黏度也较大,有时q得加撤黏剂。印刷厂希望油墨黏度能得到改善,q渐取代q口高、高ha墨。报U印刷从印刷效果来讲需要高黏度低黏性,传递性能好的油墨Q尤其是高速印hҎa墨的q燥性要求更高?/span> </p> <p> <span style="font-size:16px;">    色浓度:色浓度即色彩的饱和度Q现在,报纸已经不再是白UR字的老样子,更多的已l换成了图文q茂的彩报,因此用户ҎU印L胶印油墨的色度要求也就更高了。彩报上的广告、图片、题目比较夺目,因此需要a墨的色浓度要相对提高。但是现在很多报用a墨的色浓度都不够理想Q印刷厂Z保证印刷密度Q不得不加大墨量Q或提高|点的百分比Q但q样做的l果势必造成堆墨Q用墨量增大。加大墨量还会造成|点q连。正常的轮{胶印|点增大应控制在25%以下Q如果墨大了Q就会造成层次丢失和网点过度增大,特别是图片,|点增大造成的后果更明显。另外,前几q出现比较严重的问题是黑墨色饱和度不I现在仍然存在Q但已经不是大问题了。造成黑墨色浓度低的原因是印刷厂在普通的文字印刷Ӟ为降低成本,选用了hg、质量稍差的黑墨。正是由于有q样的需求,自然有一些a墨厂生q种劣质油墨Q媄响了油墨的整体质量?/span> </p> <p> <span style="font-size:16px;">    国油墨在色度斚w不理想的原因有以下几点:一是目前a墨厂大多不是自己生颜料Q而是采购国颜料研磨Q国产颜料与q口颜料在质量上q有差距;二是油墨厂ؓ了节U成本,使用较少的颜料,D油墨的色饱和度不?q有关键的一ҎQ即佉K料的质量和用量都q关Q国家标准规定a墨的颗粒l度不可大于 15μmQ研得细Qa墨的颜色鲜艟뀂如果颜料的加工工艺不够好,如研的颗粒大小不合适,油墨的色度也会受到影响。当Ӟ印刷品的层次及色彩不只与油墨相关Q还与印版制作、印刯备、水墨^衡等工艺条g相关Qa墨的质量也是印刷质量提高的前提和保证?/span> </p> <p> <span style="font-size:16px;">    叠印性:报纸印刷对胶印a墨套色性的要求主要有两点,一是色序,二是油墨黏度的递变性。目前国际上报纸印刷标准色序是青-品红-?黑,光度应是逐渐减小Q否则就会出现a墨反拉现象。现在一些大型a墨厂已经注意CҎ印刷色序拉开油墨黏度|他们也经怸油墨供应商沟通,及时调整油墨的墨性?/span> </p></p> <p><div>上一?<a href="69.html">贵阳印刷厂讲qC印刷原理对印刷当时的cd有哪些方?/a></div> <div>下一?<a href="66.html">贵阳资料印刷之合版印L关知识介l?/a></div> </p> <div class="tag">相关标签Q?a href='/key.aspx?k=%b9%f3%d1%f4%bb%ad%b2%e1%d3%a1%cb%a2'>贵阳d印刷</a>,</div> </div> </div> <h3> <div class="function"></div> </h3> <h1 class="title margin_5"><span> <p>相关信息</p> <a href="/news/"><img src="/template/gyyzyyw001/images/more.gif" alt="贵阳d印刷" width="38" height="14" align="absbottom" class="more" /></a></span></h1> <div class="box"> <div class="news_list"> <table 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