Under the premise of ensuring that the density of the multi-primary solids reaches the standard, the ink on the printing plate is counterbalanced with a minimum amount of water. The standard for identifying ink and water balance with printed products is that the print dot is well restored, the dots are not pasted, the dots are not spent, and the color reproduction is good.
The size of the moisture of the plate is mainly judged from the following aspects: there are water drops on the ink fountain and the ink roller, it is not easy to stir even when the ink is added, the ink layer on the ink roller is thick and the viscosity is small, the paper is soft after printing, and the post-press curls. The paper is not well received, the water is shadowed by the blanket, the color difference is large before and after the interruption of printing, etc., which means that the moisture of the layout is too large.
In addition to controlling the water balance to the minimum, the following points should be noted:
Choose a good plate. The printing plate is the basis for the printing of Jinan albums, and it is also a prerequisite for ink and water balance. It is necessary to select a PS plate with fine and uniform sand and a certain mechanical strength, which is relatively stable in oleophilic and hydrophilic, and improves the printing durability of the printing plate.
1. The dampening solution has a profitable version of the ink balance. For common type of fountain solution, chemical components such as phosphoric acid, ammonium nitrate, ammonium dihydrogen phosphate, ammonium dichromate, citric acid and gum arabic are usually added, and alcohol or isopropyl alcohol is added to the alcohol fountain solution. Due to the addition of acidic substances, the dampening solution is weakly acidic, and its acidity has a great influence on the total wetting property of the dampening solution. Therefore, the pH value of the dampening solution must be strictly controlled, and the general control range is 4.5~. Between 5.5. Due to the difference in the pH of the paper, the amount of ink on the layout, the performance of the ink, etc., the specific values ​​should be determined as appropriate. Alcohol dampening solution contains ethanol, which can reduce the surface tension of dampening solution and improve surface activity, which is beneficial to ink balance.
2. Ink quality maintains good transfer performance. Ink quality. The key influence of the ink on the ink balance is the viscosity, fluidity, water resistance, particle size and the like of the ink. The ink with high viscosity and low fluidity is also strong in water resistance. Maintaining proper viscosity and fluidity can maintain a relatively stable ink-to-ink balance. If the ink is too thin and fluid, its viscosity and cohesion are inevitable. Decreased, water and water repellent properties are reduced, and it is easy to emulsify excessively; if it is to accelerate the drying of the ink, adding excessive dry oil will also increase the viscosity of the ink and enhance the adhesion. It is required to dilute the ink fountain during printing, in order to improve the fluidity of the ink and maintain good transfer performance, thereby facilitating the balance of ink and water.
It is worth noting that when the Jinan album press is running at high speed, the water supply is not as low as possible. In actual production, because the speed of the printing press is very high, a lot of heat will be generated, and water is needed to dissipate heat. Therefore, the effect of the fountain solution is not only the balance of ink and ink, but also the temperature of the printing plate and the blanket. Important role.
3. The influence of ink and wash balance on the printing quality of the whole color newspaper is very comprehensive. In the production practice, the ink and wash balance has a great influence on the printing quality of the whole color newspaper. Correctly controlling the ink and water balance is the key to improving the printing quality of the color newspaper. . There are many factors that affect the balance of ink and water, so it is difficult to accurately quantify the standard. In the printing process, it should be adjusted according to the changes of various conditions. While mastering the basic principles of ink and water balance, the operator should also make timely and correct judgments on various situations encountered in the operation, pay attention to it and carefully observe the ink and wash. The regularity of balance, in order to control the balance of ink and ink, and finally print high-quality color newspapers.
4. Jinan album printing http: the law of ink and water balance
The graphic imprint on the printing plate is embodied by the ink, and the amount of ink supply in the printing has a great influence on the quality of the printed matter. If the amount of ink is too small, the printed matter will reflect the dot is not full, the ink color is gray and dull; if the amount of ink is too large, the paste will be excessively enlarged, the ink will be splashed, and the printed blank will be dirty and the back will be stained. Dirty, etc., seriously affect the quality of the product. In actual production and application, there are often phenomena such as large ink and water, small ink and thick water, large ink and large water, and small ink. In terms of ink volume control, it should be determined according to the content of the layout, proof of the sample and the performance of the paper.
Layout text. In the actual map printing, the amount of ink can be printed thicker; while the printing grid points or text lines, it can be printed on a clear basis, but the density of the field should be within the control range.
The tinting strength of the ink. Some inks have poor tinting strength, and the printed products are dull and lifeless. In the text, the prints are not real-time, and the amount of ink can be adjusted appropriately.
Single and double-sided printing. For single-sided printing, the printing ink layer can be appropriately thicker than the double-sided printing.
Paper performance. Coated paper, glass cardboard, such paper has a smooth surface and slow absorption, so the amount of ink should be smaller. However, when printing real maps, the amount of ink should not be too small. For thinner paper, the ink layer in the printing should not be printed thick, while the paper with coarse and absorbent properties can be made larger.
The thickness of the ink layer on the print and the thickness of the ink on the ink roller can be observed by the ink knife scraping stripe to observe the amount of ink on the ink roller, thereby estimating the amount of ink on the surface of the layout and the sheet.
In summary, the amount of ink supply in printing should be adjusted according to the specific conditions of the production site at that time. By analyzing the specific reasons affecting the relative balance of ink and wash, the necessary measures are taken to increase or decrease the ink in a reasonable manner to avoid product quality accidents caused by ink imbalance.
Drop-in kitchen sinks, also called self-rimming sinks, overmount sinks, or top-mount sinks, are sink basins that install and sit on top of your kitchen counter. There is a visible rim or lip on the perimeter of the basin that rests just over the cut-out for the sink. Drop-in sinks are supported by this lip and a series of hidden clips that attach to the underside of the countertop.
The Advantages of Drop-In Sinks
Drop-in sinks have some clear advantages over other styles, especially in the kitchen.
Cost
They`re generally cheaper to buy and easier to install than undermount sinks. In fact, even weekend warriors and DIY newbies should have no problem installing a basic overmount sink. If cost is a consideration in your kitchen, an overmount sink with a do-it-yourself install is a great way to stay within budget.
Cleaning
While cleaning may not be your foremost concern when choosing a kitchen sink, it should be considered. After all, you`ll have to care for and maintain your sink regularly. The basin of an overmount sink is easier to clean than the basin of an Undermount Sink.
Protection
If you`ve got soft countertops, drop-in sinks can help protect the edges of the sink cutout.
- Marble and some specialty counter finishes benefit from the added protection provided by the lip of a drop-in kitchen sink basin. It prevents the build up of water on the surface edges of the stone through repeated exposure of use.
- If you have laminate countertops, drop-in sinks are the only option: the particle board below the laminate surface isn`t strong enough to support undermount sinks but plays well with self-rimming basin types.
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