Environmentally Friendly Premiere at IPEX:

Two New Inkjet Printers
are "Good Deinkable"


 

INGEDE Press Release 1/2010

While some digital printer manufacturers still fiddle about the methodology of recyclability tests and the paper industry’s deinking process*, others have already done their homework: At the IPEX 2010 fair in Birmingham, for the first time two different inkjet printing systems are shown which independently of each other deliver good deinkable printed products. Xerox’s production inkjet technology is currently the only one that without applying costly precoating materials to the paper receives “good” deinkability according to the ERPC Deinkability Scores**. The highest possible rating “good deinkable” with even better detailed results is also achieved by prints from Fujifilm’s Jet Press 720, a B2 sheet-fed digital inkjet press.

These systems use totally different approaches to end up with good deinkability: One does completely without water soluble pigments or dyes but sputters melted, hydrophobic ink to the paper which does not dissolve during paper recycling. The other process uses some kind of binding agent which is applied to the paper immediately before the ink. It fixes the originally water based pigments so well, that they can be removed as larger particles later. A similar system had been shown by HP at drupa 2008 but samples of the currently available final product do not fulfil the deinkability criteria yet.

Result of a Consistent Dialogue

Before drupa 2008 INGEDE had pointed at problems in recycling the prevalent inkjet prints (see press release). While dry toner prints are generally good deinkable, with inkjet prints this works only on a few special papers. “Like a red sock in a washing machine with white laundry, prints with water soluble dyes or pigments can make a whole load of recovered paper useless for recycling”, explains Axel Fischer, chemist and INGEDE’s expert for recycling digital prints. “The recent developments are a nice acknowledgment for the consistent dialogue of the paper industry with the digital printer manufacturers which we lead for a couple of years now. They also show that it is actually possible to design inkjet prints in a way that they work well in the existing system of paper recycling. For the future, we can expect more positive development in this sector.” At a symposium in Munich in April, the Japanese chemical company KAO had presented a third approach – a pigment which by special encapsulation also leads to good deinkable print results.

With all three systems, good deinkability goes hand in hand with better image quality – these inks tend to less bleeding and less strike through.

INGEDE is an association of leading European paper manufacturers founded in 1989. INGEDE aims at promoting utilisation of recovered graphic paper (newsprint, magazines and office paper) and improving the conditions for an extended use of recovered paper for the production of graphic and hygiene papers.

* Deinking is the removal of printing ink from the recovered paper during the paper recycling process.

** ERPC is the European Recovered Paper Council. The “Deinkability Score” system is available from the ERPC web­site www.paperrecovery.org.

19 May 2010

Links:

(button)This press release for download

(button)German version of this press release for download

Addition: Also before IPEX 2010, IMPIKA claimed that the iPress 2400 inkjet printer's "inks are compatible with the most recent deinking techniques". INGEDE is not aware of any deinking tests with IMPIKA. Also, IMPIKA has not answered INGEDE's repeated questions regarding this point. There is no reason to believe that especially dye based inks might be deinkable without any pre-treatment of the paper.

(button) More information is available on the Deinking Digital Prints section of INGEDE's website.

 

 


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