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印刷行業掌握水量控制的必要性!
作者:admin 來源:http://fashionalized.com 發布時間:2019-4-25 14:01:34 瀏覽次數:182
在濟南彩色乐天堂fun88体育中,諸多印刷故障都與水有關,所以水墨平衡顯得尤為重要。而只有了解和掌握印版水膜形成過程,才能更好地控制水墨平衡,減少印刷故障的發生。
In Jinan color design printing, many printing faults are related to water, so ink balance is particularly important. Only by understanding and mastering the formation process of water film can we better control the balance of ink and water and reduce the occurrence of printing faults.
在彩色印刷時,一開始調整墨色和水膜控制非常重要。水膜控制好,墨膜自然就定形;水膜控制不好,調整墨色時雖然墨膜定形,但這是一種假水墨平衡,在印刷開始時容易出現墨色變色現象,加上墨輥表面出現結晶物,更容易造成墨色變色嚴重,直接影響成品質量。所以,印刷開始時要重點控制好印版水膜厚度。
In color printing, it is very important to adjust ink color and water film control at the beginning. When the ink film is well controlled, the ink film will be fixed naturally; if the water film is not well controlled, although the ink film is fixed when adjusting the ink color, it is a false ink balance, which is prone to discoloration at the beginning of printing, and the crystals on the surface of the ink roll, it is easier to cause serious discoloration of the ink color and directly affect the quality of the finished product. Therefore, at the beginning of printing, we should focus on controlling the thickness of water film.
正常情況下計量輥與水斗輥間壓力大,會造成水膜薄,屬于擠壓狀態。計量輥與水斗輥間壓力小,造成水膜厚,屬于滾壓狀態,運轉方式為轉速慢而供水水膜薄而不均勻。
Normally, the pressure between measuring roll and bucket roll is large, which will cause thin water film and belong to extrusion state. The pressure between measuring roll and bucket roll is small, which results in thick water film and belongs to rolling state. The running mode is slow speed and thin and uneven water film.

這兩種情況的水膜在新機器開始時效果不明顯,隨著機器使用一段時間后,兩種水膜印出的同一種印品顏色不一致。這是因為新機器的水、墨輥都處于較理想狀態,水、墨輥平衡速度快。

濟南彩色乐天堂fun88体育

In both cases, the effect of the water film is not obvious at the beginning of the new machine. With the use of the machine for a period of time, the color of the same print printed by the two kinds of water film is inconsistent. This is because the water and ink rollers of the new machine are in an ideal state, and the balance speed of the water and ink rollers is fast.
隨著機器使用一段時間后,膠輥表面的絨面被糊死形成一層結晶物,膠輥表面不容易回到原始狀態,在開始印刷時由于用水量大,油墨在墨輥上嚴重乳化,造成其黏性迅速下降,并發生色變,尤其是品紅、青疊印時非常明顯,疊印不上,從而造成花版現象,調整品紅、青色序也沒有效果。在這種情況下需要調整水斗輥與計量輥間的壓力,使兩邊先上臟,兩輥之間擠壓,使水膜變得薄而均勻,并與預潤版轉速相對接近,以便更好地調整墨色控制水膜。
With the machine being used for a period of time, the suede on the surface of COTS is pasted to form a layer of crystals, and the surface of COTS is not easy to return to its original state. In the beginning of printing, because of the large amount of water, ink is seriously emulsified on the ink rolls, resulting in a rapid decline in its viscosity and color change, especially when magenta and blue are overlapped, it is very obvious that the overlapping can not be printed, thus causing printing plate phenomenon and adjustments. The order of red and blue has no effect. In this case, it is necessary to adjust the pressure between the bucket roll and the measuring roll so that the two sides are dirty first and squeezed between the two rolls to make the water film thinner and more uniform, which is relatively close to the speed of the pre-wetting plate, so as to better adjust the ink color to control the water film.
好了,以上由濟南彩色乐天堂fun88体育整理提供的精彩內容就到這里了,更多相關的業務問題可以咨詢我們官網的客服人員:http://fashionalized.com!謝謝支持!
Okay, that's all for the wonderful content provided by Jinan color design and printing. More business related questions can be consulted with our customer service staff on our official website: http://fashionalized.com! Thank you for your support.