BNF HARDWARE CO., LTD , https://www.bnfhandles.com
As the earliest professional ink manufacturer that imported advanced foreign technologies and funds, Hanghua Ink Chemical Co., Ltd. has gone through a steady growth in the past years. Since the establishment of the company, it has actively established technical research and development departments and has continuously strengthened its own technological development capabilities. With technical personnel with rich practical experience in Japan who have studied and studied at a professional level, the company will cultivate high-quality workforces and can absorb and absorb foreign advanced technologies and continuously develop new technology development teams. At the same time, it will adopt world-class technologies and The most advanced production equipment. Regardless of whether it is at the level of production technology or product quality, we have narrowed the gap with the international advanced level in a relatively short period of time. Among them, an offset four-color printing ink has passed the international ink of Apple Computer and the United States Printing Foundation (GATF). The test reached Pantone's ink standard, and the actual printing performance also reached the level of similar products in Japan, and obtained the pass for further exploring the international market. Over the past few years, the company has relied on continuous innovation and transformation of technology, followed by the rapid development of the printing industry, in order to meet the needs of users, in the continuous improvement of various types of sheetfed lithographic offset ink, offset rotary ink, plastic film gravure ink, paper In addition to the quality of conventional products such as gravure inks and alcohol-soluble inks, it is also very much focused on combining its own technological advantages. It has timely digested and absorbed formulation technology imported from Japan, and developed and produced a variety of products that can meet the direction of 21st century printing development. High-quality, pollution-free, non-polluting new ink products, such as flexographic printing water-based inks, water-based gloss oils and various UV-curing inks, serve the evolving printing industry.
After years of hard work and competition, the company has firmly established a market-oriented, all-round market, and serves the user's sense of competition. Through the introduction of college graduates to enrich the marketing team, optimize the marketing management structure, and strive to provide high-quality, stable ink products and excellent after-sales service together, allowing users to rest assured that use, to obtain a satisfactory product value.
At the beginning of 2000, the company obtained ISO9002 quality system certification and clearly established a comprehensive management system to ensure a stable product quality. In this more orderly quality management environment, we will do everything possible to provide users with timely, high-quality and stable products, and cherish the “Hanghua†brand that has been recognized by the printing industry, and continue to maintain an increasingly established society. Image, actively tracking the development trend of the international ink market and the emerging new demands in the printing industry (currently, it is adaptable to extremely high-speed rotary printing inks, water-based inks for high-precision, high-quality printing, and the use of milk cartons for printing. The development of ink products, as well as the absorption and absorption of UV-curable ink technologies that TOKA is particularly adept at, to increase the localization rate as quickly as possible, have invested a lot of research power), giving full play to the company's ability to produce various types of printing inks Sexual technology advantage, and strive to promptly provide the printing industry users with high-quality products and various types of technical advice and technical services to meet the actual use requirements.
The application of water-based ink (a) The characteristics of commonly used alkali-soluble water-based ink:
(1) It can be well applied to the printing of various kinds of paper, but it is still necessary to further improve the properties such as drying property, wettability and adhesion when applied to film printing;
(2) Alkaline, PH value is generally in the range of 8-10, affecting viscosity, viscosity, etc.;
(3) Ammonia (amine) and other reflective components affect the dispersibility and color development of certain pigments;
(4) The law of viscosity change is complex. Besides temperature and water dilution factors, it is also easily affected by PH value, a small amount of volatile components and additives;
(5) Defoaming: pay attention to the production process and printing process;
(6) Dual-drying mechanism: osmotic absorption fixation (incipient dryness) and ammonia volatilization drying (complete drying), multi-color overprinting of corrugated paper requires more control of drying and superimposed effects;
(7) Printing film tolerance is poor, need to adjust a variety of additives, high-grade goods printing is best to cover (usually water-based varnishes or UV Varnish).
(B) The use of water-based ink points (1) before use and sampling should be fully shaken ink, under the same conditions or fixed conditions to confirm the hue, color concentration and flow viscosity;
(2) determine the viscosity of the machine: according to the printing speed, the condition of the printing plate and the required color density;
(3) When diluting with water or special thinner, pay attention to excessive dilution (the viscosity of water-based ink is easy to drop). When the viscosity is too low, it is better to adjust with the original ink to avoid using thickener as much as possible;
(4) In the printing process, changes in viscosity are often detected, records are made, adjustments are made in time, and sometimes the pH value is controlled (for example, ink with long or open time);
(5) When there are more bubbles, a small amount of defoamer may be added, but the amount and method of addition should be noted;
(6) The relevant machinery and equipment should be cleaned as soon as the end of printing, and the anilox roller should be kept clean and easy to clean;
(7) Unused ink should be kept in an airtight manner, and it is better to use the 80-mesh filter after reuse.
Water-based ink development prospects and hopes First, several stages of corrugated paper printing development characteristics Until now, there are still some corrugated paper is still using the first offset offset printing paper and then the method of making cardboard boxes, but this kind of cartons in addition to the picture printing is more fine (However, the use of low-copper coated paper, more likely to reveal tile marks), in terms of production efficiency, production costs, carton strength, and specifications suitable for printing, has lagged far behind the production of water-based ink flexo-printing cartons. With the continuous improvement of flexographic technology and the constant change of market demand, the different quality requirements for packaging materials can also be compared and analyzed from the aspect of printing level, which can be roughly divided into the following four printing forms:
1) Solid-color printing, mostly text and solid graphics, requires only a single color ink, a wide range of viscosity, can adapt to a long time continuous printing, resulting in the hue, color concentration fluctuations are not easy to detect, requirements Not high;
2) The combination of monochrome solid and grid dot pattern printing must take into account whether the designed grid points will be pasted or blocked under certain printing pressure. The range of upper machine viscosity of water-based ink becomes narrower, and at the same time, it is necessary to take into account both the requirements of on-site concentration adaptation and the clearness of grid points;
3) Single-tone version of dot pattern printing requires water-based ink to have a proper concentration gradient and sufficient contrast, the upper machine viscosity is very low, the range of change is very narrow, generally are spot-color ink;
4) Color level overlay printing, the color inks of three primary colors with relatively fixed performance parameters such as hue and concentration are directly used for color registration.
The above four printing forms will appear in the same printed product in combination with each other in practical applications. In order to improve the operability of the printing job, it is required to scientifically and reasonably distribute the color separation of each pattern and require plate making, and it is also required that the performance of the water-based ink be easily adjusted and controlled within a certain allowable range.
The establishment and application of three-primary water-based inks for color lithography printing includes the technical requirements necessary for these four types of printing modalities and represents the technical level of high-quality flexographic printing of corrugated boxes.
Some well-known laser color separation printing companies in China have taken the lead in establishing the color separation method for the three primary colors of corrugated paper flexo printing in practice, and cooperated with printing plants and ink factories to expand the network, overlay printing, and color control. Can make effective exploration and adjustment, printing out very characteristic products.
Summarize the practical experience we have obtained and consider that:
1, the three primary colors of water-based ink is not only three colors equal to the standard indicators can meet the requirements can be used to print, three primary colors (black if necessary) must be applied as a whole.
2. The dryness and stickiness requirements of each color have appropriate differences. The transparency and hiding power must be balanced, as well as the leveling and printing color sequence all need to be considered as a whole, and the amount of ink on the printing process and the viscosity of the upper machine must be emphasized. Must maintain good stability.
A set of three-color water-based inks suitable for corrugated printing should also have at least the following characteristics:
1. The printing ink hue and color density of the ink should be as consistent as possible with the requirement for the color separation of the plate making. The “three primary colors†that are not available under different color conditions will be very different. Once they are established, the requirements for water-based ink indicators, separation and platemaking conditions, and paper quality will remain relatively unchanged.
2, the imprint is smooth, smooth, that is good leveling, can highlight the level of the tone change, so that physical objects, landscapes and people and other color patterns are better shown in the relatively loose and rough corrugated paper.
3, color hue, color concentration and viscosity have a higher stability. In the effective control of the machine occupancy range, select the appropriate number of lines of the anilox roller, control the amount of ink, under the conditions of stable pressure, overprint accuracy, to obtain a stable print density and dot definition. That is, each batch of ink is required to have good stability, and it is also required to maintain the storage stability of each color ink and the stability over time at the time of on-press under such low viscosity, relatively high color density printing conditions.
Second, the establishment and application of the three primary colors of water-based ink Under the condition that the standard is difficult to establish, the printing factory can only cooperate with the color separation plate making company and the ink manufacturer from its own actual conditions to establish the trichromatic color hue and the reproducibility and printing of the plate making outlets. The relationship between pressure and precision.
The conditional carton printing factory will directly carry out color separation and plate making according to the originals according to their own actual conditions and experience, and let the ink manufacturer produce special “three-primary†water-based inks matching the color separation conditions. As long as they can meet the needs of users, the tri-color prints under this special condition will have a considerable competitive advantage.
The printing and production of a high quality carton requires at least:
1, high-quality color separation plate making technology;
2, high-quality water-based ink;
3, skilled printing operation technology;
4, multi-color unit with good accuracy.
It is suggested that carton printers should be able to step by step, emphasize the continuous improvement of printing skills in practice, pay attention to the accumulation of technology and personnel training. Starting from the printing of well-designed dot patterns, we will make more concrete examples for controlling the printing conditions with clear dots, balanced color density, smooth ink transfer, and less printing defects. For example:
1. Reasonably design the density and enlargement rate of the level version of outlets;
2. Learn to compare water-based inks with excellent overall performance and easy to adapt to a wide range of printing conditions;
3, training skilled operators, so that they have more opportunities to directly understand the printing process in the printing plate, ink, machinery, printing materials and supporting supplies each other between the constraints;
4, establish a reasonable and economic concept of cost, the cost of the material can be a reasonable combination of the correct choice.
Third, "Hanghua" ink related products Introduction Hanghua Ink Chemical Co., Ltd. as early as in 1993, in time to digest the formula technology introduced from Japan, direct use of internationally renowned resin company's high-quality acrylic copolymer resin, a wide range of screening at home and abroad A large number of pigments, according to the actual conditions of domestic flexographic printing, printing, and printing and machinery, continue to optimize the formula, specifically established WBI BF series water-based ink system suitable for corrugated carton, cardboard, kraft paper flexographic printing and WFT series applied to narrow Water-based inks for high-grade printing on flexo presses and various types of water-based overlays. The specifically designed low viscosity, high color density aqueous inks are particularly suitable for high quality carton printing and exhibit the following features:
1. Bright color, smooth print, high gloss, suitable for a wide range of paper quality. Among them, the three primary colors of ink are very suitable for printing with color gradation printing, and can restore the original effect quite realistically;
2. Carefully selected pigments and dispersion systems with good stability, maintaining good hue stability, and maintaining good stability and good leveling even when printed at a relatively low viscosity;
3, excellent viscosity stability, showing excellent flow
Hanghua Ink Chemical Co., Ltd. was jointly invested by Hangzhou Ink Factory, Japan's T&K TOKA Co., Ltd. and Bank of China. The total investment was 13.7 million U.S. dollars and was officially put into production at the end of 1991. In 1999, it produced nearly 10,000 tons of various types of printing inks, achieved a sales revenue of RMB 213 million, and ranked second in the nation's ink industry. It was an advanced technology-based and foreign exchange earning company in Hangzhou and won the 2000 Hangzhou collective labor model. title.