Whether it is carton color box, offset gravure, do not open ink, plate and other consumables, of which ink is also the core consumables in addition to base paper, cardboard, roll film. Printing costs in the paper accounted for 60-65% of the total price, ink accounted for about 8-12%. If it is gravure printing, the proportion of ink should be relatively higher, which can account for 30-40%. In some enterprises, the annual consumption can reach more than 100,000 yuan in the process of ink washing and inking alone. Therefore, through scientific management of ink, cost control is very important and necessary.
 
A short outline:
 
1. Dosage calculation and optimization
 
2. Supplier review
 
Third, production scheduling optimization
 
Four, ink reception and use
 
Five, the treatment of residual ink
 
Six, ink inventory management
 
 
 
1. Dosage calculation and optimization
 
After calculating the ink consumption of a printed matter, the ink consumption of the entire printing order can be calculated, and then the ink consumption at the time of production can be calculated by adding the ink consumption rate and the minimum ink consumption of the printer.
 
Printing ink amount (g)= printing area x ink thickness x ink specific gravity
 
Production ink consumption = one printing ink consumption x loss rate x number of prints + minimum ink consumption
 
In the ERP management system, it can also be divided according to the actual amount of ink, combined with the printing area, so as to obtain the actual ink consumption data, according to this data, the ink consumption can be further optimized.
 
Second, ink procurement, acceptance and supplier review
 
There are many shortcomings in the printing ink in the Chinese market, and the most prominent problem is the ink hue deviation problem: on the one hand, the color of the same ink produced by different ink manufacturers is different; On the other hand, even if the same ink is produced by the same manufacturer, the batch is different, and the hue will be deviated, sometimes even greatly. For this reason, the printing plant often has to shut down and debug, which is very unfavorable to the stability of the printing quality, brings great inconvenience to the production, and seriously hinders the improvement of the quality of printed matter.
 
There is still a certain gap between domestic ink and imported ink, especially in high-end products, domestic ink manufacturers should improve the technical level and production capacity as soon as possible, and drive the improvement of the entire ink manufacturing level.
 
Before purchasing ink, enterprises should conduct the necessary review of the production capacity and quality commitment of suppliers, and strictly control the procurement procedure. The selection, review and procurement control of suppliers shall include the following contents.
 
1. Procedures for finding qualified and reliable ink suppliers.
 
For printing companies, information is a very important resource, if you do not understand the market, will cause economic losses to enterprises. Therefore, packaging and printing enterprises must fully understand the ink market conditions, detailed understanding of suppliers and their products related information, through printing and related industry newspapers, networks, product fairs, investigations and other ways to understand, so as to find a certain production capacity of ink suppliers as procurement objects. To select qualified suppliers, the purchasing department shall first issue the Supplier Review Form to the candidate suppliers for investigation, and invite the candidate suppliers to provide relevant product information or samples, supply performance, production capacity, service level, credibility, annual quality status and relevant information to prove quality assurance as reference materials for review.
 
2. On-site inspection of the production status of ink manufacturers.
 
Large and medium-sized printing enterprises use large amounts of ink, so we must carefully grasp the procurement control method, choose suppliers that can take into account quality and price. Before the targeted procurement, the printing plant can organize relevant personnel to carry out field visits to the ink production plant, to have a comprehensive understanding and mastery of its production site, product performance, research and development strength, quality assurance ability and customer satisfaction, and to submit a written inspection report to the relevant leaders of the enterprise for review, for the purchase of reliable quality ink, Provide reliable information for factory purchasing decisions.
 
3. Try and judge the purchased ink.
 
When purchasing ink products, according to the local climate conditions, product characteristics and other factors, select the appropriate ink brand for production trial, and then according to the production application effect, quality status, by the technical, inspection, production management personnel and procurement department relevant personnel, to evaluate its adaptability. After the procurement department evaluates the actual ability of production quality and quantity of the supplier, the procurement department will apply for qualified suppliers according to the product trial results, and the inspection, production and financial departments will respectively put forward review opinions on their quality status, production suitability and price rationality. Then the confirmed list of qualified suppliers is submitted to the top decision maker of the enterprise for approval and confirmed as qualified suppliers. In addition, for the long-term fixed-point suppliers to provide improved and upgraded ink products, it is also necessary to carry out small batch trial, trial qualified before mass procurement, in order to ensure the stability of product quality.
 
It is worth mentioning that the qualified suppliers, not necessarily each have to carry out fixed procurement, if the quality is found to be unstable in use, it can be suspended procurement, compressed procurement or elimination to ensure the stability of product quality.
 
4.choose excellent suppliers
 
For printing factories, choosing ink suppliers with strong production and testing capabilities is to help and promote the technical progress of printing factories. Because for the printing plant, it is difficult to be equipped with a complete set of ink professional testing equipment, and the understanding of ink technical performance is difficult to be comprehensive and thorough. Therefore, there are certain limitations to the detection and control of ink quality. Printing plants are often found in the use of ink quality problems, found to have a negative impact on production. In order to ensure the stability of print quality and improve printing production efficiency, it is a more effective procurement control measure to select suppliers with strong production capacity, complete testing and control means, reliable and stable product quality, good after-sales service and moderate price as qualified suppliers. The production practice also clearly shows that the production of large-scale ink factory, its production equipment, production is relatively advanced, testing instruments are relatively complete, the quality detection and control of ink products is relatively good, product quality is stable, and the probability of quality problems is also very low. Choosing an ink factory with strong production capacity and quality control ability as a supplier can also correctly apply ink to the printing plant and play a better guiding role.
 
Five, the treatment of residual ink
 
1. Ink management after production
 
In principle, old and new ink are required to be stored separately, and if they are to be mixed, they must be the same number, so as not to accidentally reverse the ink, resulting in poor printing next time.
 
At the same time, the ink is a volatile liquid, and the barrel lid should be covered after use to prevent dust, volatilization and curing. Inks that have not been used for a long time can be transferred to other colors.
 
2. Disposal of residual ink
 
How to deal with the residual ink of spot color ink is also a problem worth thinking about for packaging and printing companies. If it is only put aside for a long time, it will lead to residual ink dust crust, and even oxidation deterioration or direct scrapping, causing unnecessary economic losses. In fact, we may wish to adopt the following two methods to deal with it, so as to minimize the loss.
 
(1) In the deployment of another batch of dark field spot color ink, according to the similarity of its composition and hue, it may be mixed with the original spot color ink, but be careful not to change the color of the ink.
 
(2) For the long-term storage of various colors of leftover ink, according to the color principle of the three primary colors of the ink color material, it can be mixed into black ink, if the black degree is not enough, you can appropriately add primary black ink. In four-color printing, the black plate "Outlines" and "emphasizes" the dark part of the pattern, and does not affect the basic color of the pattern. However, due to the presence of more ink skin and limited blackness in the black ink of residual ink mixing, ink spots are easy to occur when printing the packaging products of solid color blocks, and the lack of certain brightness and brightness. Therefore, we should try to avoid using this black ink to print field patterns, and it can be used for book text printing and ordinary color printing.
 
Six, ink inventory management
 
In order to achieve a better preservation effect, label printing ink should be stored in a closed container at room temperature, cool, dry, away from light, and ventilated environment.
 
In the process of storage and management of label printing ink should also pay attention to the following issues:
 
(1) Safety first. When storing ink, try to stay away from fire and heat sources to prevent accidents.
 
(2) It is best to maintain a constant temperature in the ink warehouse, and the temperature difference between the printing workshop can not be too great. If the temperature difference between the two is large, the ink should be put into the printing workshop in advance, which is not only conducive to the stability of the ink performance, but also to ensure the high efficiency of production.
 
(3) In some areas of the north, the winter is relatively cold, should avoid storing ink outdoors, to prevent ink gelling at low temperatures. If gelling occurs, transfer it to a high temperature warehouse, or place it in hot water to restore the insoluble matter to its original state.
 
(4) The principle of "first in first out" should be followed in ink storage and management. That is, the ink purchased first is used first to prevent the ink from affecting its use effect due to too long storage time.
 
(5) Ink also has a certain shelf life. If stored for too long, the various components in the ink will be separated and precipitated. Therefore, the ink should not be stored for a long time, and the general storage period is 1 year.
 
(6) The remaining ink after printing must be sealed and stored in a dark place. Before re-use, it must be filtered with more than 100 mesh filter, fully stirred and then mixed with new ink. The label printing plant should effectively manage the label printing ink, the specific measures are: the label printing plant should generally set up a special material management department, responsible for the unified management of raw and auxiliary materials, including ink, establish a sound material management system, formulate a reasonable feeding and obtaining procedures, and implement strict warehousing and warehousing procedures. That is, a special person is responsible for the management of ink, and the ink products are stored in partitions to avoid misapplication and misuse. In addition, the type, origin, batch, quantity and use of the ink should be recorded in detail to ensure the traceability of the product.

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