Inkjet printing concept
Inkjet printing is a non-pressure printing method in which letters and images are obtained by computer-controlled ink flow from a nozzle onto a substrate. In recent years, inkjet printing is advancing toward almost all printing fields and its printing quality is getting better and better. As can be seen from DRUPA 2004, inkjet printing is among the technical highlights and will be the subject of DRUPA 2008.
The so-called "ink-jet printing" is a non-contact, pressureless, non-printing printing and copying technology. It has the common features of digital printing without printing and can realize variable information printing.
The principle of ink-jet printing is to first input the graphic information stored by an electronic computer into an ink-jet printer, and then, under a control of the electronic computer, nozzles spray droplets of ink droplets on the surface of the substrate according to the charge. The effect is directly imaged on the surface of the substrate and becomes the final print.
Inkjet printing classification
1, according to inkjet system classification
The basic principle of ink-jet printing is to generate small ink droplets and guide them to the set position. According to the different inkjet systems, it can be divided into continuous and on-demand two.
The so-called continuous inkjet printing (CIJ), whether imprinted or non-printed, is the continuous generation of ink droplets in a flowing manner, and then transferred by the electric field deflection to form an image, and finally the non-imprinted droplets are recycled or dispersion.
In so-called drop-on-demand printing (DOD), ink droplets are generated only in the printed portion. Specially used for printing excellent quality images, suitable for packaging color pictures, textiles and large-format billboards, is an ideal choice for full-color, high-precision printing. Print quality is its most important consideration.
2, according to the printing color classification
Inkjet printing can be divided into black and white ink jet printing and color ink jet printing according to its printing color. Single ink for black and white ink jet printing, machine structure and ink system are relatively simple, and color ink jet printing is relatively complicated.
The advantages and features of inkjet printing
(1) Inkjet printing is all-digital printing, completely out of the cumbersome procedures of the traditional printing process, the requirements for color overprinting and trapping are not high, do not need to consider the accuracy of the registration, the preparation time is short, the reaction to the market is fast, the operation With a short production cycle, digital proofs and short-run jobs can be produced with very high time efficiency and cost efficiency.
(2) Realizing variable data printing and custom printing. The image information can be changed at any time to meet the user's short-run printing jobs and personalized printing needs, such as personal albums, product descriptions, materials, test-marketing products, and packaging samples.
(3) A copy of the printing, reducing waste, printing services more flexible, usually has an advantage in a thousand prints.
(4) Digital features make it easier to introduce digital integration technologies such as digital asset management, automated workflows, and color management.
(5) It can realize remote printing and provide remote printing service through internet transmission, especially suitable for quick printing of chain operations across regions.
(6) Most inkjet printing technologies are non-contact printing and can be replicated on a variety of substrate materials, such as variable inkjet printing on a variety of commercial production lines.
(7) Digital web inkjet printing equipment can be limited by the length of the paper, allowing large-format, panoramic reproductions.