什么样的塑料凹版油墨是好油墨

2025-03-16 06:39:29
推荐回答(1个)
回答(1):

只有有效固体成分高(着色力高、附着力好)、色相好、颗粒又细的油墨才是好油墨。因为,这种油墨外观看好象稀,实际上很耐稀释。也就是说,这种油墨因为有效成分高,能多加稀料,一公斤可能顶劣质的油墨1.5——2公斤。表面看这种油墨好象贵点,但是核算印刷总成本却要比低价位的劣质油墨还要便宜。更何况,这种油墨因为墨性好,油墨细、有筋骨,有油性,不沉淀,印刷工用起来好用,不容易出现变性、起脑等问题。
优质油墨比劣质油墨能多加稀料,道理是什么呢?这是由油墨的着色力和附着力决定的。油墨有效成分的多少决定油墨的着色力和附着力,决定油墨的稀释度,决定添加稀料的多少。添加稀料的多少决定印刷面积的大小。印刷面积的大小决定印刷成本的高低。因此,等重量的油墨,印刷时添加稀料越多印刷面积越大,其油墨印刷总成本也越低,这已经是定论。
油墨的着色力、附着力和印刷面积是正比例关系。印刷着色力和附着力有一个最低允许值,这个最低允许值决定了添加稀料的多少。稀释过度不行。稀释过度油墨就显现不出颜色和亮度了,必然造成色泽差、附着力也差。如果油墨本身的着色力和附着力已经是最低限度了,印刷时就不能再加稀料。这种情况油墨价也就是印刷成本价。质量好的油墨,稀释不足也不行。稀释不足不仅浪费油墨,而且印刷效果也不好。

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