1. There is an error (jump) in the accuracy of the press cylinder, which can cause a difference in each package in the same direction. Is there any way to compensate for hue errors due to poor machine accuracy?
A: The problem of the press roller can not be remedied by other methods, so keep the machine in good condition; just as you can't use the 1900 factory car, just like the reason for the new car race.
2. How does a high-speed printer control the range of density variation of ±0.08 for each hue?
A; The machine must be installed with automatic monitoring and automatic adjustment.
3. Every Huangmei season or high humidity in the workshop, the ink is often easy to deink when the temperature changes. Drum condensation on the drum, resulting in large changes in color or water stains, there is no way to improve its ink resistance in water?
A: The ink itself is resistant to water. The condensate on the roller is because the factory has no temperature adjustment. The best way is to install air conditioning and humidity control systems in the factory.
4. The paper base paper (poor surface quality), resulting in missed printing, improved after adding ink varnish to the ink, but it often produces bite and body. Is there a better way to solve it?
A: The quality of the paper is not good. Better papers should be replaced; adopting alternatives will affect the fluency and efficiency of actual production. Even if there is a solution, it is not proposed.
5. The charge caused by high-speed friction between the aluminum surface of the base paper and the metal roller causes breakdown, and it cannot be eradicated after the discharge wheel is installed. Is there a better way to eliminate static electricity?
A: In addition to the static elimination device, in addition to the static elimination lever on the machine, the temperature and humidity of the factory can be adjusted, for example, the degree of air conditioning is added or subtracted, and the automatic humidity adjuster is installed in the factory; if it is not installed, wettable paper such as “hanging†paper". All in all, if the temperature and humidity are adjusted to the same level as the paper and factory buildings, the troubles can be solved.
6. Some dark-spotted blacks (such as dark blue, brown, purple, etc.) are very easy to form on the outside of the rubber mouth. Currently, they can only be improved by increasing the viscosity. However, there are also paper-fed offset printing problems. Is there a way to have the best of both worlds? Solve it?
A: The reason for the rise is due to the imbalance of acid teeth in the sink and the poor ink foundation. Please adjust the ink and sink solution.
7. What are the factors causing the color change during printing?
A: Many factors cannot be recorded. Please check the paper, ink, water bath, workshop humidity, rubber blanket, ink roller, machine performance and status.
8. After cleaning the rubber roller for a long time (using car wash water for spot color, 5 and 6 groups), it was found that the roller was deformed and the middle of the roller was thickened. Is it possible to recommend a good Roll Wash?
A: The car wash water is a mixed formula product of the oil company. It should be ordered by a company with all quality assurances. The manufacturer should also test which kind of car wash water is suitable for the application; the imported car wash water is too expensive to be recommended.
9. How to avoid pulling color? For example: There is a design, blue accounted for a large layout, and red, yellow accounted for a small proportion, often see the red and yellow ink because of pulling out the blue ink and body?
Answer: Pulling is the problem of overprinting multi-color. To adjust the viscosity of the first group of inks to the last group of inks; the first group has the strongest viscosity, and the last group has the weakest viscosity, then the first group (mostly black). The ink is the strongest adhesion, not easy to pull up, the second group of red or blue adhesion is moderate, the third and the fourth group of weak adhesion will not pull the previously printed ink; quality assurance ink supplier, The ink viscosity (TACK) will surely be stated on the package. The captain can also use ink conditioners to adjust the adhesion of each color ink.
10. What is the difference between EB inks and other inks (general offset inks and UV inks)? What are the special requirements for EB ink printing blankets?
A: Ordinary offset inks are oxidatively dry inks, which use the penetration and air oxidation to dry the ink; UV inks are light-sensitive inks that are cured by ultraviolet light and do not wait for drying. The blankets are flexible and inelastic. Many elastic blankets should be printed. Which kind of blanket is more suitable for which type of printing, must be printed on its own to find the best fit.
11. Why spot color ink easy body, poor printability?
A: Because spot color inks use a large amount of developing agent (clear ink), the viscosity (TACK) is low. Mixing corn powder or varnish can reduce the problem.
12. How to solve overprint problems caused by equipment and other issues?
Answer: (a) Use better paper, (b) Use better ink, (b) Use better printing plate, (d) Use better rubber cloth, (e) Use better ink additives, (6) Use quality-assured chemical raw materials (flume solution, etc.), (VII) Adjust the state of the factory's temperature and humidity in accordance with the paper, (8) Maintain the machine's performance, clean and maintain the equipment, and (9) Strengthen the education staff. Really understand the problem; encourage them to study and propose improvements.
Suggestion: Some printing problems are fundamental issues. For example, machines, materials, and factory environment. Without careful solution, there is no progress. It is difficult for a clever woman to have no rice bran. What a good staff can't be magical. Another non-fundamental issue is the perception, communication, and attitude of managers and work. Managers and staff should continue to receive education and establish an effective communication mechanism. Modern management is called comprehensive management. Encourage grassroots organizations to identify the causes of problems and communicate problems and solutions step by step. Managers use scientific methods to analyze causes. And review the effectiveness of the solutions and strengthen discussions with a view to achieving the best results. In the end, of course, it needs the support of the top management, for example, proposing some capital proposals to increase the thermostat temperature in the factory, and it must have a capital investment. If it is not accepted, all problems will still exist and the problem cannot be solved.