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The rapid development of the Internet, digital information age, people want the future of the textile Printing Toward high-speed, high efficiency, high-quality direction, digital jet printing technology is in line with this requirement. Digital jet printing in the 20th century appeared on 90 international latest printing technology, traditional printing technology is a major breakthrough, is a computer, electronic information, mechanical variety of disciplines in an integrated high-tech. Jet printing of digital printing technology has changed the traditional modes of production. To the textile industry brought a new concept, so that printing industry from the traditional labor-intensive industries into the digital age of high technology. Digital jet printing is a computer under the control of the tiny droplets sprayed on the substrate (eg fabric) of a precise location to form a pattern of non-contact printing process technology. 1 The principle of digital printing Digital inkjet printing works is Ink Outside force to make it through the spray nozzle to form the fabric color point, and then form motifs. Digital jet printing by the digital technology control and non-jet spray nozzle, which emit the color of ink spray in the XY direction when the movement to ensure that the fabric surface to form the required image and color. Digital printing technology is an important indicator for the resolution (Dotperinch, referred to as dpi), i.e. the points per inch. In inkjet printing, the different substrates on the resolution demands are also different. Generally from 180 to 360 dpi, the image has been clear. On the very fine image, dpi Zexu increased to 360 ~ 720. Resolution to improve the frequency after the injection nozzle, oriented more demanding accuracy. Digital printing by injection in different ways, can be divided into a continuous flow type and divided into two types on demand drops of liquid. Continuous flow-type printing systems, ink is forced under high pressure through a diameter of 10 to 50 Linmi small nozzle, the ink flow from the nozzle in a different way droplets dispersed into small, such as StorkAmethyst; demand drip-type printing, is to manipulate the droplet generation and injection, spray drops when needed to set the pattern on the fabric. On-demand liquid drop model can be divided into piezoelectric conversion type, such as Japan's Konica's Nassenger, Minaka of Jv, with piezoelectric nozzle; heated bubble-type, such as Japan, Ichinose's Imageproofer, the United States Color Span's Fabric jet, heated bubble sprinkler. 1.1 continuous jet CIJ (ContinuouS Ink Jet) Continuous jet digital printing principle is to impose high-frequency vibration through the ink pressure to eject ink from the nozzle in the continuous formation of droplets of uniform flow. The nozzle has a photoelectric conversion signal synchronized with the graphical changes in the electric field. Exhaled droplets have a choice in the charging zone in the electric field, when the droplet flow to continue through the deflection field, the charged droplets in the electric field under the influence of deflection, is not charged droplets to maintain straight flight, straight flight of liquid drops can not reach to be printed substrate was set liquid recovery device, charged spray droplets to be printed substrate. 1.2-demand jet DOD (Drop on Demand) On-demand jet printing system works is when you need printing, the system of the color ink within the nozzle by high frequency electromagnetic mechanical force and thermal shock, so that the formation of tiny droplets from the nozzle, the computer-controlled injection to set the pattern Office. On-demand jet is the most widely used thermal inkjet technology, which relies on heat pulse generated droplets is controlled by computer to a resistance to the provisions of Continuous Twisted heat temperature, so that ink from the nozzle after vaporization. The other DOD Piezo injection system technology, from computer-controlled piezoelectric material in the imposition of a potential, so that the direction of piezoelectric field generated in the compression direction is vertical expansion of electric field, so that ink ejected. Requires not only high-precision ink-jet printing nozzle technology and high precision control technology, also requires a high purity, high density, high fastness and high stability of the ink matching. 2 the characteristics of digital printing Known textile inkjet printing digital ink jet printing, which is input through various means (scanner, digital camera, etc.) to the required design input computer, issued by the computer color separation scanning system (CAD) edit processed by computer controlled ink jet inkjet agencies directly to the fabric for printing. It is the computer-aided design CAD and printing the result of joint development of new machinery, textile printing to suit individual, small-volume, multi-variety, high-quality trends and develop. Digital ink jet printing and traditional screen printing very different, can be said that a revolution in printing industry. 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