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印刷油墨配色時應註意的問題-步殼印刷

From:Buke printing factory of China步殼印刷 | Author:China Bukeprinting factorybook0755 | Published time: 2020-06-24 | 616 Views | Share:
仔細觀察色樣,特別註意觀察被印基材,從基材粗糙與光滑、反射程度來選擇油墨。例如,油墨印刷在光滑、反光極強的鋁板或易拉罐上,選擇透明性高的油墨,將有助於大大增強油墨的金屬光澤。

  仔細觀察色樣,特別註意觀察被印基材,從基材粗糙與光滑、反射程度來選擇油墨。例如,油墨印刷在光滑、反光極強的鋁板或易拉罐上,選擇透明性高的油墨,將有助於大大增強油墨的金屬光澤。

  選擇配色所需的油墨時,盡可能避免混合過多油墨,盡量使用接近於標準色及由單一顏料製成的油墨。配色使用色墨越多、離標準色越遠,則亮度越差,混合出來的顏色啞光程度越高,不可能借配色來調制原色。

  要特別註意油墨著色力。如果所選用油墨濃度不夠高,不論怎樣拼配,也無法達到標準顏色濃度。

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  需要加入白、黑墨時,應特別註意所加入的分量及稱量的準確性。在所有油墨中,白墨的遮蓋力特強,加入過多,不但會沖淡顏色,同時也會阻止底材反光程度。不過,對於印刷凹凸不平基材如尼龍布、紙板時,為了保證印品外觀,最好印刷一層作為底色的白色。由於黑墨的著色力特強,稍不慎加入過多,就需要加入相當多其它色墨來調整顏色,造成浪費,因此需特別註意。

  製作淡色油墨時,應從墨膜透光程度判斷其應加入多少白墨或者調墨油(沖淡劑)進行調色。絕對不允許把溶劑(稀釋水)用於沖淡顏色。溶劑加入過多,不但會影響印刷性能,而且會破壞油墨結構,造成顏料與樹脂油分離,出現沉澱或者大大地降低油墨光澤。
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