Miracle Plates Drive New Technologies in the Printing Industry

JPI plans to use this unique CTP technology for commercial production by 2012 and will do its best to increase the value of this technology and accelerate its time to market. Although JPI has not yet come up with a clear plan on how to bring this technology to market, it hopes to work with its partners to contribute to the environmental protection process of the printing industry.

Since the ancient times, every leaps of the printing industry have been promoted by breakthrough technologies that may fundamentally change the market. The non-ablation CTP plates that were launched in 1995 are a typical example of these breakthrough technologies. Today, another thermal CTP plate technology that may change the status of the industry has emerged

JPImageJPI, a newly established company, was founded by three experienced and respected printing experts. The most striking thing the company has done since its establishment was the launch of MiraclePlatetechnolog JPI. After many years of research on this technology and cooperation with a number of universities and the British government, although it has not yet been converted into a product, the company has now applied for a patent on its own magical plate technology. The coated aluminum version is exposed to laser light to convert it from a hydrophobic state to a hydrophilic state. The details of this technique have been described in detail in patent documents numbered GB0816697.7 and GB0910791.3.

So, what's the potential of this technology? The magic plate technology has mainly shown me a unique concept - transforming an uncoated blank plate from a hydrophobic state to a hydrophilic state. Plates do not require coatings on the plates, just as those that dispense with the plates do not require the use of a developer or developer solution, and therefore can bring significant economic and environmental benefits to the printing industry. There are three ways to use:

One-time use: The uncoated blank plate is imaged and printed and then recycled in the usual way.

Repeated use: If the ink on the plate can be removed after printing and its hydrophobic properties (natural recovery or heating) can be restored, the plate can be re-imaged and repeated throughout the printing process. One of the technical challenges currently facing is how to re-image the already bent plate.

The last method is to choose a reusable and easy-to-remove printing cylinder or sleeve for the printing press so that it can be easily integrated into the platemaking system.

The above method can be used on a new generation of DI printers, because the printers mainly use on-machine imaging, and can clean the ink on the plate before printing again.

Development status

Magical plate technology is currently in the early stages of development. The JPI development team is mainly led by Dr. Rod Pott, former head of offset printing research and development at DuPont and Agfa, and Dr. Peter Bennett, previous head of offset printing plates at Kodak, and previous printing from DuPont. Edition production manager John Adamson. Currently working with a number of universities in the UK, in particular the University of Liverpool's Lairdsid Laser Engineering Center.

Experts have found through research that uncoated plastic anodic alumina can change from hydrophilic to hydrophobic as long as it is exposed to air for a few days. JPI is now able to temporarily convert uncoated aluminum plates from hydrophobic to hydrophilic using ultra-high-speed pulsed lasers. As a result, the imaging area of ​​the plate will be hydrophilic (foudal fluid) and not the imaged area will be inked. At present, this type of printing plate has a resistance of about a few thousand impressions. After printing, people can also wash the ink off the plate and then restore it to a normal hydrophobic state. The most prominent feature of the magic printing plate technology is that the plate can be stored in a normal atmosphere or heated in an oven.

If this technology is converted into a product, its greatest advantage is to eliminate the user's demand for chemicals, organic solvents, developing equipment and developer in the process of printing plate coating. In addition, it can also play a role in maintaining the environment by reducing the demand for aluminum materials in the printing industry through repeated use.

Magical plate technology mainly uses ultra-short pulse laser to change the properties of aluminum or other metal oxide plates. This process called “electromagnetic coupling” changes the contact angle between aluminum plate and water. The normal contact angle is 70. Degrees, and after electromagnetic coupling, the contact angle between them will become 20 degrees. After the plate is exposed, it will maintain a hydrophilic state for approximately 12 hours, and then gradually return to normal. There are many parameters that affect the recovery time of the printing plate, so the user must adjust it according to the characteristics of the printing plate technology. JPI believes that it will not only be able to develop a plate that can maintain a hydrophilic state for 24 hours after exposure, but it can also reduce the plate's recovery time after printing to within a few minutes.

Of course, people have raised questions about this emerging plate technology. The first question is how to put a plate that has been bent and used on a printing press into the CTP for re-exposure. Secondly, which type of CTP should be used to image the plate? The third problem is that How many times can the plate be reused? The low-power pulsed fiber laser used in the magic plate technology has not been applied in any printing field. However, laser technology has always been developed and changed from time to time and its price is expected to drop before the market for magical printing plate dedicated CTP. Nowadays rare low-power fiber lasers mostly output a single laser beam, and therefore are more suitable for use on inner drum or flat panel CTPs than on thermal CTPs.

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