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    濟南印刷出現刀線的油墨是什么作用?

    來源:http://www.mbtshoesclearanceinc.com/   發布時間:2020-10-28
    1.油墨黏度的影響
    1. The influence of ink viscosity
    濟南印刷廠油墨黏度應與印刷速度相匹配,高速印刷時,油墨的黏度控制在12~15秒(3#察恩杯)之間;中速印刷時,油墨的黏度應控制在16~18秒(3#察恩杯)之間。油墨黏度過高,對印版滾筒的黏附性過強,不利于刮墨刀將版面多余的油墨刮干凈,印刷品出現刀線的幾率就高。印刷過程中要定時測量和控制好油墨黏度,一般隔20—30分鐘測量一次。
    The viscosity of ink in Jinan printing plant should match the printing speed. When printing at high speed, the viscosity of the ink should be controlled between 12 and 15 seconds (3 × chaen cup); in medium speed printing, the viscosity of ink should be controlled between 16 and 18 seconds (3 × chaen cup). The viscosity of the ink is too high, and the adhesion to the printing plate cylinder is too strong, which is not conducive to the scraping knife to clean the redundant ink in the layout, and the probability of knife line in printed matter is high. During the printing process, the ink viscosity should be measured and controlled regularly, usually every 20-30 minutes.
    2.油墨干燥性的影響
    2. The influence of ink dryness
    油墨干燥過快,容易出現結皮現象,如果結皮在油墨循環過程中未被溶解,一旦接觸到刮墨刀就會黏附在刀口或刀底,產生印刷品刀線。如果油墨循環系統采用的是敞口墨槽,更容易發生油墨結皮、結塊現象。為了減少此類刀線故障的發生幾率,要經常攪拌墨槽中的油墨;根據需要加入適量慢干劑;如有條件,還可加裝密封蓋,能夠有效地控制和減少印刷品刀線故障。
    If the ink dries too fast, it is easy to skin. If the crust is not dissolved in the process of ink circulation, once it contacts the doctor blade, it will adhere to the edge or the bottom of the knife, resulting in printed product knife line. If the ink circulation system is open ink tank, it is more likely to occur ink crust, caking phenomenon. In order to reduce the occurrence of such knife line failure, the ink in the ink tank should be stirred frequently; appropriate amount of slow drying agent should be added as required; if possible, a sealing cover can be added to effectively control and reduce the knife line fault of printed matter.
    3.油墨細度的影響
    3. The influence of ink fineness
    凹印油墨主要由顏料,連結料、助劑等成分組成。如果顏料研磨不充分,顆粒較粗,且不溶于連結料和溶劑中,印刷時停留在刮墨刀口,就會導致印刷品出現細小,不規則的刀線。顏料顆粒的細度對刀線的出現頻率有直接影響,例如藍墨中所使用的顏料顆粒硬度高,即使經過充分研磨也很難達到很細的顆粒度,在印刷過程中就容易損傷刮墨刀或影響刮墨效果,印刷藍墨時經常出現刀線故障。

    濟南印刷
    Gravure ink is mainly composed of pigments, binders and additives. If the pigment is not fully grinded, the particles are coarse and insoluble in the binder and solvent, and stay at the edge of the squeegee during printing, it will lead to small and irregular knife lines. The fineness of pigment particles has a direct impact on the frequency of knife line. For example, the pigment particles used in blue ink have high hardness, and it is difficult to achieve a very fine particle size even after full grinding. In the printing process, it is easy to damage the doctor blade or affect the scraping effect. When printing blue ink, knife line failure often occurs.
    4.油墨活性的影響
    4. The influence of ink activity
    在油墨生產過程中,一般都加入一定量的活性劑。印版滾筒鍍鉻后也有一定的活性,如果油墨和印版滾筒的活性太高,在印刷時,活性物質就會牢固地黏附在滾筒上,刮墨刀也很難將其刮干凈,從而形成刀線。此時先對印版滾筒進行清洗,清除其表面的活性物質,同時在油墨中加入活性減緩劑消除刀線。
    In the ink production process, generally add a certain amount of active agent. The plate cylinder also has a certain activity after chromium plating. If the activity of the ink and plate cylinder is too high, the active substance will adhere firmly to the cylinder during printing, and it is difficult for the scraper to clean it, thus forming a knife line. At this time, the plate cylinder is cleaned to remove the active substances on its surface, and the active retarder is added to the ink to eliminate the knife line.
    5.油墨質量的影響
    5. The influence of ink quality
    油墨儲存時間過長,溶劑平衡發生變化,引起油墨溶解力降低;或者油墨調配、使用不當,引起化學反應,都會使油墨產生沉淀。在印刷過程中,油墨中的沉淀物容易積聚在刮墨刀口引起刀線,需要更換油墨。
    Ink storage time is too long, solvent balance changes, resulting in ink solubility reduction; or ink deployment, improper use, causing chemical reactions, will make ink precipitation. In the printing process, the deposit in the ink is easy to accumulate on the blade edge, causing knife line, so the ink needs to be replaced.
    濟南印刷廠講解的內容  更多的內容  請咨詢公司官網http://www.mbtshoesclearanceinc.com/

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