Standardized printing can implement the exhibition . In addition to having a comprehensive technical team and suitable equipment, it is necessary to use standard and high stability materials, otherwise it will disrupt the consistency of production and affect its production capacity and quality. Therefore, the cognition and requirements of materials are particularly important, and the low-priced product printing market is pursued at the purchase price. Without understanding the level of products, the standard and stability are achieved. It will not be worth the candle. Dazu Guanhua
There are so many materials needed for printing, so in this article we can only share with the reader the seemingly simple, very important standard for four-color and spot color inks and the way to distinguish their quality. I hope that this will give readers a basis to make informed choices. software
Four-color ink PS version
Color screen printing standard ISO2846-2 problem
Due to the color management system used in recent printing standards, the required standards are based on the annotations of each sub-item in ISO12647-2. Therefore, it is important to use a four-color ink that conforms to the ISO 2846-2 standard. The author is aware that there are many four-color inks that can be ISO2846-2 approved on the market, but most of them cannot meet the requirements of ISO12647-2 in print. One of the main reasons is that the US agency that evaluates ISO2846-2 four-color inks only requires the maintenance and maintenance of the four-color ink equipment that is sent for approval. On the paper of the specified standard value, the four-color full version made with the general color machine is used. The color bar, as long as its L*a*b* value, transparency and ink layer thickness reach its very loose qualifying range. DeltaE5 can. There is no dot gain standard for 4-color inks. Therefore, the 4-color ink that does not meet the value-added requirements of the dot can also be qualified. Generally, the four-color ink may have a situation in which the dot value is excessively increased. Usually, the printing department makes a method of reducing the dot density when the printing plate is produced. However, if the four-color ink of the above-mentioned high difference value L*a*b*DeltaE5 is used, it is impossible to adjust the printing of the printed matter which requires the color-printing printing , and the value of the dot-added value. Usually, the printing master will replace the overprinted part with a spot color or print the overlap and dot portions twice. It is very time consuming. Therefore choose a relatively low drop yet comply with the standard 4 color ink produced was smooth and increase capacity up to effect the printing material
Four-color ink in pre-dry, dry and ink concentration linkage relationship DTP
In the first hour after printing, the printing is almost pre-dried by means of infiltration, and then the drying is carried out by oxidizing the conjunctiva. However, in general, the formulation of the cheaper ink is lower, and the relatively suitable binder is used; in particular, the mineral oil which is volatilized after drying is more, which forms the dry color value of the printed matter when it is dried. The wet color values ​​vary greatly. The ink uses more mineral oil Esko in the formulation, which not only increases the VOC content, but also causes the ink to infiltrate into the paper excessively. The result is that when the print is dry, it will find a lighter than expected color. A lot. To avoid this excessive wet dry color value, printing technicians will only use band-aid approach would increase the amount of ink, which is the case in addition to a lot of wasted ink and no external environmental Huaguang Seiko, its not easy to do, to be multi-purpose spray The adverse consequences of powder, easy back printing and excessive dot size will appear one after another. Therefore, the general printing master tests the newly printed printing with the feel of the hand, and it is a wrong understanding that the ink that feels faster to dry is better, because the faster the drying time is, the faster the ink penetrates into the paper instead of the real one. Quickly dry ink. As long as the inks used in the printing time, do not have and would not back print digital publishing with more powder and printed materials, can also be completely dry within a reasonable time. Especially for the bottom eight-color printing, it is even more difficult to use pre-drying ink. Detection system and instrument
When the ink emulsion ink balance the importance of detergent packaging
This problem, which is generally not mentioned in depth, is actually the biggest key to determining whether the ink is stable or not in the printing process. Many printers believe that emulsification is a savage beast. The fact is that the ink must be emulsified with the water tank before transfer, otherwise the ink cannot be transferred normally. It is relatively simple to say that emulsification is "water-mixed" as long as the ratio of "water-mixed oil" can maintain its stability during long printing periods, and the transfer performance of these inks should be better. A set of high-quality four-color inks can detect tens of thousands of sheets without the need to stop the cleaning of the blanket without any external factors such as too much paper hair. Every time you use a volatile cleaning solution and expensive downtime when cleaning a blanket, it is equivalent to: no environmental protection and low productivity. Integration
Therefore, in addition to knowing how to choose a relatively good quality four-color ink, it is equally important to use a high-quality water bath and isopropyl alcohol (IPA) to stably maintain its acid-base (ph) and conductivity values. Of course, the temperature of the ink cartridge during printing must be stably maintained within the range of 29-33 degrees, otherwise it will affect its normal dot gain. (Do not just hearsay add some additives have an adverse effect on the stability and affect the printing color prints in particular value, because the ink from the real thing should inks engineers to deal with it right!) Kore
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