subject: The quality of digital printing and offset the gap is narrowing - digital printing press, offset press - printing industry [print this page] The quality of digital printing and offset the gap is narrowing - digital printing press, offset press - printing industry
Editor's Note: At the recent IPA Technical Conference, we have seen many Digital Printing Heidelberg XL105 machine can reach with print quality comparable to offset.
Often as color digital printing Management , Print quality and durability issues and get our approval. Some people think that digital printing in the production process shift occurs frequently, can not be color managed, can not match the color hue and the special-thick ink film breakdown region in the folding process and other issues. International Prepress Association (IPA) report the latest technology: the people of the digital printing of these criticisms are actually misunderstanding?? In many cases, digital printing and offset printing can be comparable, even in color, print quality and durability performance more than offset.
To solve around the digital printing side of the mystery, IPA Digital Print Forum (IPA Digital Print Forum) conducted a series of studies, and of eight digital press and Heidelberg XL105 output quality sheet-fed presses were compared. Participate in the comparative experiments of digital printing are: Kodak The company's Nexpress S3000, Konica Minolta's bizhub PRO C6500, PunchGraphix company Xeikon 6000 and 8000 and Xerox iGen3.
HP does not directly involved in this experiment, but HP digital presses in the two users?? NorthAmerican Color and Cobher Press Inc. Indigo presses for the IPA provides printing proofs.
This comprehensive survey covering all aspects of digital print production, including color, print runs and print between the variability of physical characteristics, such as: wear resistance, crack resistance and resistance to fading resistance. In addition, IPA also test the process of printing digital printing speeds and reach GRACoL (U.S. offset Commercial Printing Norms Organization) standards of competence assessed.
IPA Digital Print Forum in North America for the first time on different printer can produce the proofs of deinking and recyclability was evaluated. They Western Michigan University in the United States set up a digital inking and recycling of laboratory and digital printing materials can be found in deinking treatment, they can also be recycled paper, made from post-consumer waste products.
The study also obtained a very interesting result: high prices of digital printing equipment, printing may not be able to get higher quality?? Although expensive printing unit may have more data processing power, faster The speed and advanced finishing capabilities.
Toner image of consistency and the breakdown
Conformance test on the image of testing process, it printing and measuring a total of 1,000 sheets. The results showed that the ink density in the digital printing process, there is only less than 0.1 deviation. In another test, most people on the dark blocks of color image analysis found that Konica Minolta Printing Equipment Enough value in L * 6 print out the most dark effect. In addition, IPA staff printed out by the printing Pantone spot colors into the computer and found that digital printers and offset press can match the 40% to 50% of Pantone spot colors.
Ink on a print runs in the higher regions of collapse coverage, when the performance of digital print runs almost no difference between offset printing proofs. For often finishing, transport and manual handling of the ink film occurs during wear or loss and other issues, digital printing has a stronger resistance.
Digital offset printing surface than the surface of the product has better wear resistance. During the test, only one device out of the proofs printed ink film off phenomenon occurred. In another test, it proofs through prolonged exposure to light against them under the anti-fade resistance were evaluated.
Digital press users always try to use their output to match a specific color image data. Digital press manufacturers should develop a device able to create any kind of ideal color system?? This Printing services Suppliers to understand the process and maintain toner mixed with neutral gray of paramount importance. These suppliers and must give every living conditions are to GRACoL or SWOP standards; but they must want to improve their production system color management.
