INGEDE News Summer 2020
indigo not deinkable
- Calendar of Events
- INGEDE’s Autumn Symposium on October 1st at LEIPA in Schwedt
- INGEDE publishes Position Paper UV Inks ans Varnish
- Another serious damage in a paper mill caused by HP Indigo inks
- Study in the INGEDE Lab: Indigo performs even worse in a 2-loop method
- Klebstoff-Studie in Zusammenarbeit mit dem Umweltbundesamt (UBA) veröffentlicht
- Neues von unseren INGEDE-Partnern – Markus Hoffmann (KURZ) im Interview
- Axel Fischer explains deinking in a promotional YouTube Video by KURZ
- SUBSCRIBE to our (not always) monthly newsletter!
INGEDE's Autumn Symposium
on Oct 1, 2020,
at LEIPA in Schwedt
PACKAGING DESIGN IN THE FIBER CYCLE
Packaging protects. From touch, from dust, from moisture, from air, from damages. Modern packaging is multi‐talented. Especially if made of paper & board, especially in competition with plastic. Packaging is a valuable resource that has to be recycled to a high‐quality material. The conflict of objectives is pre‐programmed – functionality and appealing design on the one hand and the best possible recyclability on the other. Helping to ensure that white packaging remains in the white fibre cycle is a goal that INGEDE has set itself.
INGEDE will discuss issues in designing packaging for an optimum recyclability of white fibres with experts from authorities, research, paper mills, and users.
In addition, LEIPA offers a visit to the paper mill in the afternoon of September 30, 2020, with the new paper machine PM 5, launched in 2018.
It will also be possible to attend virtually by registering for the live stream provided with simultaneous translation!
Register now for the INGEDE Autumn Symposium!
More information here: INGEDE Autumn Symposium
INGEDE Position Paper UV Inks and Varnish
Within the last years, more and more printed products have been produced with UV inks and UV varnishes. Further development has also been within the curing of such UV products, e. g. by the development of low-energy UV (LE-UV) and of light emitting diodes (LED-UV).
As a critical aspect, especially the recycling of UV printer waste with poor deinkability has been identified. Here, a high concentration of crosslinked inks can lead to high amounts of dirt specks, surpassing the toleable levels.
For certainty, INGEDE recommends using the Scorecard “Assessment of Printed Product Recyclability – Deinkability Score”, published by the European Paper Recycling Council (EPRC), to evaluate the deinkability of a printed product.
In order to communicate issues related to UV-cured print products, INGEDE has now published a position paper.
Disposing of INDIGO printer waste with graphic paper for recycling is prohibited
It has been known for more than ten years* that printing with HP Indigo liquid toner causes massive problems in paper recycling, even in the smallest quantities. According to the EN 643 paper for recycling standard, Indigo print shop waste must not be disposed of with the graphic paper for recycling. Nevertheless, corresponding print products can still be found in deliveries that come from print shops where, for example, photo books are produced. In most cases, these deliveries are detected in good time by the quality control departments in the paper mills before they can cause damage in production. Now, however, another paper mill is reporting damage in the region of 100,000 euros because probably only one delivery containing Indigo waste was able to pass the paper mill’s incoming inspection undetected.
During the deinking process the printing ink is to be removed at the paper mill. But this fails with liquid toner, which, unlike conventional printing, is a plastic layer laminated onto the paper. If a quality defect is discovered in the finished pulp or only in the paper, it takes a certain amount of time to eliminate the defect because pulp is already in production for several hours. Therefore, several hundred tons of production were rendered useless by coloured dots (illustration). At present, the source is being searched for on the basis of the recovered prints and the extent to which both the printing company and the disposer can be held liable for the damage.
In France the press manufacturer HP published a joint declaration in 2018 together with associations of the French paper and graphics industry and the waste disposal sector. The statement explains that HP Indigo prints cause problems when deinking paper for recycling. The printers were called upon to set up a separate collection system for Indigo prints. INGEDE reported.**
INGEDE would like to take this opportunity to reiterate that it is essential that INDIGO printed products from printers or any collection of returns are collected and disposed of separately. Mixing in or with graphic paper for recycling types at the printing plant or in the subsequent trading at the disposal companies can cause damage in production and is therefore prohibited. We urge all parties involved to comply with this and to inform the staff in the plants accordingly.
* INGEDE press release from 2010
Investigation in the INGEDE laboratory:
No advantage by complex 2-loop evaluation
INGEDE Method 11 evaluates the deinkability in the laboratory according to a simplified procedure simulating the essential steps of the deinking process. It is measured how well the ink separates from the paper and how well the ink can be removed from the “system”, i.e. from the fibre pulp.
The processes in industrial deinking plants are more complex, they include in particular additional dispersion and usually a second flotation step. To take account of this simplification, the target values of the deinkability assessment, e.g. in the EPRC scorecard, are also adjusted accordingly. In the paper chain this simplified procedure enjoys a high level of acceptance as an indicator of the expected suitability of printed products for recycling and the production of new paper. This acceptance applies worldwide, which is why ISO 21993, developed from INGEDE Method 11, was published at the beginning of the year. The EPRC Deinking Scorecard, which uses INGEDE Method 11, is the basis for several environmental labels for printed products, such as the EU Ecolabel and the Blue Angel in Germany.
Nevertheless, in order to take into account the sporadic discussions in different bodies that a two-stage laboratory deinking process could lead to completely different results for certain printing processes and better reflect industrial conditions, INGEDE had both methods compared. Within the scope of a project, the deinkability of selected print products was investigated by means of INGEDE Method 11 and the 2-loop method recently developed by the PMV department of the Technical University of Darmstadt.
All results correspond to experience and expectations. The results according to INGEDE Method 11 and the 2-loop method show the same trend, although with different absolute values. A recent study by PMV confirms that this simplification is admissible.
INGEDE will further deepen the considerations. Details will be presented at the next INGEDE Symposium in March 2021.
(updated Sept 17, 2020)
UBA-Studie: Eignung von Klebstoffen für Druckerzeugnisse mit dem Umweltzeichen Blauer Engel (DE-UZ 195)
Studie mit Unterstützung der INGEDE veröffentlicht
Der Bericht ist Teil des Forschungsvorhabens „Weiterentwicklung des Produktportfolios des Umweltzeichens Blauer Engel“. Druckerzeugnisse, die mit dem Blauen Engel DE-UZ 195 ausgezeichnet werden sind so herzustellen, dass die gebrauchten Faserstoffe den Papierrecylingkreislauf nicht behindern. Ein wichtiges Merkmal ist, neben der Deinkbarkeit von Farbstoffen, die Entfernbarkeit von Klebstoffen. Anhand von realen Druckproben mit Klebstoffapplikationen sind Laboruntersuchungen nach der INGEDE-Methode 12 „Bewertung der Rezyklierbarkeit von Druckprodukten“ in Verbindung mit der EPRC-Scorecard durchgeführt worden. Geeignete Klebstoffe sind identifiziert und können für recyclingfreundliche Druckerzeugnisse empfohlen werden.
Interview mit Markus Hoffmann (Kurz)
zum Thema Nachhaltigkeit auf print.de
„Bei jeder Metallicveredelung sind Folien im Spiel“
Markus Hoffmann (Mitglied der Geschäftsleitung bei Kurz) im Interview: Es wird in der Druckbranche derzeit sehr viel über die Wiederverwertbarkeit gesprochen. Das halte ich für sehr richtig. Aber ich stelle auch fest, dass sehr viel Unklarheit in der Branche herrscht, zu der wir, das sei selbstkritisch angemerkt, als Branchenteilnehmer auch beigetragen haben. Heute sagen doch viele: Das ist ja schön und attraktiv, was Ihr da macht, aber das hat mit Folie zu tun. Von Markenartiklern und Verarbeitern bekommen wir entsprechende Fragen gestellt. Egal ob nationale oder internationale Firmen, die möchten immer wissen: Wird meine Verpackung in irgendeiner Weise schädlich für den Verbraucher? Enthält sie schädliche Stoffe? Ist sie recycelbar? Ist sie deinkbar? Ist sie kompostierbar? Mit diesen Fragen werden wir ständig konfrontiert. (…)
Das vollständige Interview:23. Juni 2020