In plastic color printing, ink is the main raw material, which is different from film, adhesive and other raw materials: its quality and surplus (opened) and the way of use have a great relationship with on-site management. If the quality of the substrate material is poor, it can be returned at any time. However, the ink is often not of poor quality, but there is too much left, especially for spot color ink. It is a pity that these residual inks are discarded, and the reuse rate is not high, which is easy to cause overstock and waste. How to effectively use and manage ink and control ink surplus is a problem that many color printing factories must face. Here are some points for reference:

1、 Ink suppliers should not be too many, no more than three is appropriate, different brands of ink can not be mixed, so as not to cause ink waste; some color printing manufacturers may hold the mentality of occupying ink suppliers' funds, but enterprises should be based on good faith. The primary color inks produced by different ink suppliers also have certain differences in hue. When choosing an ink factory, make clear with the supplier what the majority of primary colors of our factory are biased. For example, the primary color red has bluish phase and yellowing phase, so as to ensure the consistency of primary color ink as much as possible, so as to ensure the consistency of color in printing quality. When confirming the printing proofing of a new order, try to use the primary color ink as much as possible. Do not dilute 20% of the primary red color, 30% of the yellow color of the primary color, and add some dark blue to the primary color, which makes it almost all spot colors, so that almost every ink of each printed product needs to be changed. If customers want to print the signature sample according to this ink, they will have to adjust the ink in this way in the future, which adds a lot of trouble to the printing factory. Therefore, the first signature sample is very important, and the primary color ink should be used as much as possible. In fact, there is no right or wrong color. Different people have different opinions. The key is to communicate well with customers and persuade them from the printing process requirements and printing cost. Some customers like the proofing color of the plate factory, some of them want the color of the color manuscript printed by the printer, and some of them have their own hobbies. If they are indulged blindly, the printing quality is very difficult to guarantee. At this time, it is necessary to explain to the customers that the quality of the printed matter depends on whether there is knife line, whether the level transition is natural, whether the dot transfer is successful, and so on. Especially for new varieties, there is no need to adjust the primary color. This point done, can greatly reduce the remaining ink, ink inventory, easy to manage.

2、 Spot color ink will definitely be encountered in the process of color printing, especially in the order of surface printing, spot color ink may account for more than 50%. The key to reduce waste and inventory lies in good production process control and effective implementation of production system. Ink color matching process, pay special attention to the following requirements.
First, color matching requires patience and certain technical experience. At the beginning of determining the main and auxiliary colors, do not rush to start mixing, carefully observe, analyze the printing sample, and determine the main and auxiliary colors with ink hue. Only if the main direction is correct, can we achieve the spot color hue we expect, otherwise, it will still be futile to start again.
Second, when color matching, we usually use disposable plastic cup to make small sample spot color by weight reduction method, and determine the proportion of color matching. We generally use the original ink, but the machine ink must be diluted, so when the color matching is in the later stage, we should dilute it with appropriate amount of solvent before color matching. In determining whether the two colors are similar, we should compare the face color and background color of the ink. Only when the two aspects are similar, the color of the ink can be more accurate. When the background color cannot be consistent, we can focus on the face color.
Third, because there is a big gap between scraping and printing, when the proportion of ink mixing is basically determined, the initial proofing is carried out, and the amount of ink added during complementary color is accurately recorded. After the spot color ink is determined, to save the proportion of the time, it is best to save 200 grams of ink sample, which can be compared with the standard sample in the next use. According to the amount of printing film, determine a reasonable amount of spot color, do not arbitrarily too large, otherwise waste too much ink.
3、 The ink from the press must be kept separate from the original ink. In the process of preservation, the diluted ink is prone to lamination, swelling and coarseness. When the remaining ink is poured out of the ink tank, it is necessary to seal and preserve it as soon as possible. Special attention should be paid to the integrity of the rubber sealing ring of the big mouth cover, otherwise the sealing effect will not be achieved. Then seal it with adhesive tape, and write down the date of use and the specific hue. In the next printing, these inks are filtered first and then used preferentially or mixed with the original ink. On the premise of ensuring the quality of the primary color ink, it is necessary to add some old ink from time to time in the colors with large printing volume, large ink quantity and low requirements, so that a lot of old ink can be consumed in a long time. Due to a variety of reasons no longer use (not can not be used) spot color ink, can be adjusted to other spot colors and used, generally light ink to dark ink.
4、 In the use of two-component reaction ink, adhere to the principle of adding less and frequently. That is to say, each time less dispensing, after a period of time, to reduce the amount of ink in the ink tank as much as possible, the remaining ink due to the role of chemistry, scrap volume will be relatively large. We can take the method that the residual ink is diluted with solvent as much as possible and sealed strictly, and used as the diluting solvent for next printing.
In practical work, we feel the importance of the system to control the remaining ink. How to effectively implement the above mentioned technical details in the factory is the key: to control and digest the remaining ink, there must be a set of corresponding reward and punishment system for printing operators. Otherwise, it is difficult to achieve great results. Because in any case, the remaining ink is not easy to use with new ink, and there is no certain system supervision. The operation union adjusts the use of ink at will, resulting in unnecessary waste. Of course, a good corporate culture environment is also very important.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.