平版印刷過程中，所謂的'水干'是指印版的空白局部沒有可以構(gòu)成足夠的平均水膜，即印版上的非圖像局部水量缺乏。膠印印版一旦呈現(xiàn)水干現(xiàn)象，則會(huì)招致印版的空白局部掛臟，從而影響到印刷產(chǎn)質(zhì)量量，也就是說深圳包裝印刷過程中呈現(xiàn)了水墨均衡失控。
In lithographic printing process, the so-called'dry'means that the blank part of the plate does not have enough average water film, that is, the lack of local water on the plate. Once the offset printing plate is dry, it will cause the blank part of the plate to hang dirty, thus affecting the quality of printing output, that is to say, the ink balance is out of control in Shenzhen packaging and printing process.
膠印過程中，水墨均衡的控制與許多要素有關(guān)，包括墨量與水量的調(diào)理比例、潤版液自身的質(zhì)量、潤版液的濃度、酒精的用量和溫度、油墨自身的性質(zhì)、水墨輥的壓力、環(huán)境溫濕度等等。
In offset printing process, the control of ink balance is related to many factors, including the proportion of ink volume to water volume, the quality of the embossing solution itself, the concentration of embossing solution, the amount and temperature of alcohol, the nature of the ink itself, the pressure of the ink roller, environmental temperature and humidity, etc.
假如印刷過程中，潤版液的用量和酒精的用量是正確的話，那么呈現(xiàn)印版水干的緣由可能是印刷過程中供墨系統(tǒng)的著墨輥和供水系統(tǒng)的水輥壓力設(shè)置不當(dāng)招致的，也有可能與印刷過程中運(yùn)用的潤版液的質(zhì)量有關(guān)。
If the amount of embossing solution and alcohol is correct in the printing process, the reason for the water drying of the printing plate may be the improper setting of the pressure of the ink-feeding roll and the water-supplying roll in the printing process, and may also be related to the quality of the embossing solution used in the printing process.
膠印工藝過程中，需求用水潤濕印版版面，水是極性分子，油是非極性分子，由于用水潤濕印版，就會(huì)呈現(xiàn)油墨乳化現(xiàn)象，將油墨乳化控制在10-30%范圍內(nèi)，水份的聚析和蒸發(fā)速度對(duì)印跡的枯燥是有親密關(guān)系的。由于水分子是極性很強(qiáng)的物質(zhì)，水分的存在可以障礙油分子的氧化聚合成膜，就會(huì)影響印跡的枯燥速度，環(huán)境濕度的上下對(duì)水份蒸發(fā)速度將會(huì)起到一定作用的。環(huán)境濕度增高，空氣中的氧的活動(dòng)性也會(huì)削弱，降低了油墨對(duì)氧的吸人，同時(shí)油墨墨膜內(nèi)層乳化的水分也使墨膜軟化，從而使油墨的枯燥速度減慢。所以說在膠印過程中要控制好水墨均衡，在不臟版的前提下，運(yùn)用盡量少的水分，從而減少油墨的乳化，油墨中含水量幾，對(duì)印跡枯燥關(guān)系是十分親密的。
In offset printing process, water is the polar molecule and oil is the non-polar molecule. Because water is used to wet the plate, the phenomenon of ink emulsification will appear. The emulsification of ink will be controlled within 10-30%. The speed of water accumulation and evaporation is closely related to the dullness of printing. Because water molecule is very polar material, the existence of water can hinder the oxidation and polymerization of oil molecule to form film, which will affect the drying rate of imprinting. The environmental humidity will play a certain role in the evaporation rate of water. With the increase of ambient humidity, the activity of oxygen in the air will be weakened, which reduces the oxygen absorption of ink. At the same time, the emulsified water in the inner layer of ink film also softens the ink film, thus slowing down the drying speed of the ink. So in offset printing process to control ink balance, in the premise of dirty version, the use of as little water as possible, thus reducing the emulsification of ink, ink water content a few, the dull relationship of imprinting is very close.
This article is provided by Jinan Packaging Printing. Our website is: http://www.seven2000.com. We will serve you with wholehearted enthusiasm. Welcome to visit!
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