After years' research and development, in early 2007,JuLi developed the pre-press digital demo proofing system that can use ordinary color box medium such as white cardboard, grey-grounded white cardboard, copper paper, cowskin and thin corrugated board as proofing mediums. After being tested in the market for more than a year, the system can excellently complete product outside packing carton's prepress demo proofing work. The system has the advantages of little investment and being easy to operate, low cost of proofing, short proofing cycle, identical color of demo proofing and printing, and so on. It is the upgraded product of traditional proofing and ordinary printer's proofing method. The system adopts inkjet printing method as hardware equipment,The system works with "JuLi" packing boxes' pre-press proofing dedicated ink researched and developed by JuLi Company in order to overcome the technical difficulties of proofing demo on ordinary medium. System hardware matching dedicated ink, and working in accordance with the American or German professional packaging proofing RIP software system, not only can achieve easy proofing in a variety of packing boxes' medium, becoming a color box prepress digital proofing machine in real sense, also its proofing color achieve color consistency with printing with the help of color box proofing software. Dedicated proofing ink and dedicated software JuLi carton proofing system integrate the advantages of printer proofing, traditional proofing machine proofing and ordinary digital proofing machine proofing: Medium reunification, water sample ink, less investment, little space occupancy, easy to operate, proofing fast, small repetitive error, low cost proofing, less human interference, offering a lot of packing medium proofing features to the packaging printing enterprises (such as ordinary copper paper, dumb powder paper, white cardboard, white board paper, leather paper, thin corrugated paper, etc.) Matching American or German professional carton prepress digital proofing software with JuLi high-quality professional carton proofing ink, and combining with the JuLi company's color management technology, can produce ink proofing color area which can completely cover European and the international color prin