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丝网印刷油墨色彩的调配技巧







手机网上赚钱日赚300    在丝网印刷过程中,印刷前遇到的首要问题就是油墨颜色的调配,因而经常要进行油墨颜色的选择与调配。油墨颜色的调配是印刷中最为重要的一环,色彩真实

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不能符合油墨的三个属性。
  油墨成份:溶剂性油墨组成成份是连结料、颜料、助剂、溶剂。连结料:是天然树脂或合成树脂,天然树脂中有松香、虫胶、橡胶、阿拉伯树胶等。
  合成树脂,有松香改性系列、酚醛改性系列、合成橡胶、聚酰胺等,石油系、环氧系等固体树脂;醇酸、环氧、丙烯酸系液体树脂。连结料主要起连结作用,决定

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散颜料。一般油墨所用原料配方:聚酰胺树脂31.46%,异佛尔酮二氰酸酯11.66%,聚丙二醇12.5%,异丙醇43.64%,乙二醇0.62%,二辛基二月桂酸酯1.7%....。
  墨量因素:在丝网印刷中有几个因素决定墨迹颜色的深浅,如丝网:同目数的情况下,丝网厚度厚则下墨少。同目数、同丝径斜纹编织的网比平纹编织的网下墨量

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颜色的,底色反射对调配色相有一定影响。
  环境影响:在湿度高、温度低的情况下印刷时,由于溶剂挥发速度快,吸收墨膜周围热量而造成该处空气中水蒸汽急剧冷凝,使印刷墨膜表面形成雾气,致使墨层

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反射力强,基材的反射增加光泽:防止基材表面吸附,合理改进基材印刷面的光滑程度;
手机网上赚钱日赚300  配色方法:首先要考虑色相是否一致,观察色样时最好在白天室内间接光源下进行比较,不宜被阳光直射。晚上观样时,推荐使用荧光灯管,也可使用自制混合光

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单色指由一种原色油墨调配而成。间色指由二种原色油墨调配而成的。而复色指由3种原色油墨相混合调配而成的。
  调配时选色应准确,配色技巧如下:
  粉红:以白为主,略加桃红,荧光桔红
  玉色:以白为主,略加中黄,荧光桔红
  米色:以白为主,略加枯色、中黄、微黑
  淡蓝:以白为主,略加中蓝
  湖蓝:以白为主,略加孔蓝
  灰色:以白为主,略加孔蓝、淡黄
  银灰:以白为主,略加银浆、黑墨
  雪青:以白为主,略加淡红、品蓝
  肉色:以冲淡剂为主,略加透明桔红、中黄
  象牙色:以冲淡剂为主,略加中黄、孔雀蓝、桔红。
  注意事项:
  1)油墨调色应尽可能采用油墨厂生产的色相相同的定型油墨,定型油墨的色彩度要比用二个颜色的油墨调色的彩度高;
  2)若要用多种油墨配色,应尽量利用颜色接近的定型油墨为主进行调配;
  3)配色时,应尽量减少油墨的品种,因为配色的油墨品种越多,消色比例愈高,会降低墨色的明度和彩度,故能用两个颜色能调配得来的就不用三个;
  4)塑料薄膜是非吸收性材料,不能用稀释剂来冲淡色墨,应加入白墨来冲淡;
  5)不同厂家,不同品种的油墨不混用。这会影响白墨的光泽、纯度和干燥速度的。特别是稀释剂,因没有一种油墨是万能的,承印物的材料品种很多,所以选用油

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废等。
手机网上赚钱日赚300  综上所述,调配油墨颜色时,必须认真把握好每一关口,才能调配出好的色彩来。丝印油墨色彩的调配须要在长期实践中积累经验。调的次数多了就熟练了。丝印机




 
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