Screen Printing and Technology

In recent years, the term digital printing has become more and more familiar with the screen printing industry. Digital applications are becoming more and more widespread. Digital printing is active in the digital printing industry. With the continuous improvement of digital application technology, digitalization and screen printing are closely linked. And has gone deep into the screen printing of the bottom plate production and template production and printing in all aspects.
Digital imaging and screen printing The use of film bottom plate production as a digital screen printing plate making method includes outputting a silver salt film plate making method and outputting a plate making method without a silver salt film film.
1 silver salt film bottom plate making method Photographic bottom plate making is to separate the manuscript photograph color, then use the manual way to make the picture and text imposition, after the dark room development, fixing, washing, drying and then with the screen plate printing. The process is time-consuming and labor-intensive, and the proportion of manual operations is high. In particular, the imposition is to put a variety of scattered specifications of the color separation film, text, lace, background color, etc., in accordance with the color of the other, technology layout format specifications in an overall layout. This kind of craft requires the staff to be meticulous, thorough, slightly negligent and prone to error. The method of imposition differs depending on the type of print, but it needs to be accurate.
With a desktop typesetting system, digital input and output, the image can be seen on the computer's display screen. It can be arbitrarily selected according to customer requirements, zoom in and out, tilt fonts; color shade changes, such as pattern addition, variant processing, network setting It will be very easy to output the bottom version with the addition of nets, screen angles, group drafts, final drafts, etc. Nowadays, the use of a desktop system for the screen printing will make people feel refreshed. This system can be designed, arranged, and creatively produced images and texts as desired. The software in the computer has many functions. In the design and creativity column, fonts, graphics, and drawing tools are used to modify the image. The color can be adjusted arbitrarily, there is a printing design of color samples and color card proofing design, customers can witness the entire process. It is not finalized until the customer is satisfied.
But the key issue now is that the small and medium-sized factories in the screen printing industry know little about color desktop systems. With the development of market economy, product quality competition is fierce. In order to improve product quality, it is inevitable for the screen printing industry to introduce a desktop typesetting system.
The above-mentioned photoengraving and desktop typesetting output are all silver-containing films. The development of chemicals, the process is complicated, and the environment is polluted.
2 Digitized silver-free salt film bottom plate making method directly digitized bottom plate production, representative products are TRD2000 plate making proofing system of Beijing Tongruidao Electronics Co., Ltd. The process flow: graphic production → RIPL RIP → TRD2000 output → film film (screen printing with color separation bottom plate).
The output devices (EPSON, Roland) use micro-piezo inkjet printing technology, so that the output screen printing four-color film with high density, accurate registration. The small ink droplets ejected by the inkjet head can be directly sprayed onto the surface of a PVC transparent film containing no silver salt and having a hydrophilic layer for physical imaging. Ordinary silk screen printing equipment can be used to dry screen version.
TRD plate making software can complete layout design, typesetting, prepress proofing, and output color separation. With the advantages of no imposition and revision, it reduces the number of image transfer and transfer loss. All room operations, no dark room. Compared with the silver salt plate making process, it has less pollution, eliminating the need for exposure and development processes and avoiding the problems of exposure and development.
The TRD2000 system uses its own software advantages to optimize the system, making the output film screen clear, smooth and neat dots, and more accurate color reproduction. Output film resolution 7200dpi-1440dpi, ink droplet size 6-5 microns (equivalent to 1/4-1/5 of the diameter of the hair), image resolution up to 133 lines / inch, density 3-2, AM or FM hooking is available. The width specifications of different models are: width 610mm, 1118mm, 1361mm, 1615mm, length up to 5 meters. Can replace the traditional laser imagesetter and rear projector output large format screen printing color separation film. The output of large-format screen printing four color separation film can set the network frequency, screen angle. Output width up to 1.6 meters.
Low cost: direct print color separation, small footprint, easy operation, and multi-function. The output of four-color film costs about 35 yuan per square meter. The cost of filming is far lower than the cost of the traditional laser imagesetter and projection amplifying equipment.
Fast speed: Under the premise of guaranteeing the output quality, the output speed is better than the same type plate making system and can reach 15 minutes/square meter (calculated according to the coverage rate of 90%). The total one-time investment of this system is much lower than that of laser imagesetters. The output film costs 35 yuan per square meter (including film, ink costs). Calculated on a square meter of four color chips, the cost is 35 x 4 = 140 yuan. According to the traditional laser photocopying or projection amplifier, a set of one-square-meter four-color film is charged at more than 1,000 yuan. Scope of application: Suitable for large, medium and small-scale screen printing factories to carry out large and small screen printing business, or professional film center.
In summary, the system has the advantages of less one-time investment, good performance, and multi-use of one machine. It is practical, convenient and low-cost. It is an ideal digital baseplate platemaking industry with low investment, high efficiency, and high efficiency. equipment.