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【步殼印刷】印刷廠家是怎麽調配油墨?

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-05-07 | 480 Views | Share:
油墨調配也叫配墨或調墨,即調整印刷過程中油墨的印刷適性,或利用色料減色法,用三原色油墨調配出所需色相的油墨
  油墨調配也叫配墨或調墨,即調整印刷過程中油墨的印刷適性,或利用色料減色法,用三原色油墨調配出所需色相的油墨,它是印刷過程中不可缺少的一個重要環節。油墨調配是否得當,直接影響印刷品的質量。本文,深圳印刷廠家將與大家分享油墨調配的基本原則和幾點做法。



  油墨調配的基本原則


  1.濃調淡印


  濃調淡印是指將所需油墨調配得比色樣顏色略濃一些,印刷時有意將墨量減少,使之達到色樣要求。這是因為油墨色相受墨層厚度影響較大,用同一種油墨進行印刷,當墨層厚度變化時,所呈現的色相也會隨之變化,特別是採用膠印工藝印刷時,受膠印工藝限制,墨層宜薄不宜厚。


  2.用盡量少的色料品種


  根據色料減色法,調配油墨時,用的色料品種越多,調配出的油墨顏色就越暗。所以,要盡量使用最少的色料品種,以保持油墨顏色的亮度。另外,還要利用好黑墨和白墨。在任何油墨中,加入黑墨會使油墨顏色變暗,加入白墨則會使油墨顏色的飽和度降低。


  3.把握油墨乾燥前後色相的變化


  同一種油墨乾燥前和乾燥後的色相相差很大,特別是網印油墨。例如,調配一種淺灰色油墨,剛調好時刮出的色樣顏色是符合原色樣要求的,但油墨乾燥後,其顏色明顯變深。其他顏色的油墨也會出現類似的情況。為避免出現這種情況,調配油墨時首先要刮好色樣,待色樣油墨乾燥後再與原色樣進行比較,防止出現油墨乾燥前顏色符合色樣要求而乾燥後顏色又走樣的情況,減少了因顏色不符而造成的損失。
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