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Jürgen Gemeinhardt

Jürgen Gemeinhardt

Head of department
Printing techniques

E-mail
gemeinhardt
transparent 11x15@fogra.org

Telephone
+49 89. 431 82 - 256


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Current research projects (in the field "conventional printing technologies")

10.057
Standardizing process agnostic data preparation and colour reproduction in the graphic arts industry

Timescale: 01.10.2013 to 30.09.2015
Funding:
Programme of the Federal Ministry of Economic Affairs and Energy for the support of “Industrielle Gemeinschaftsforschung (IGF)" via the German Federation of Industrial Research Associations (AiF)
Partner: Bundesverband Druck und Medien e.V.

The main goal of this project is the development of a system approach trying to consolidate important ISO standards in the graphic arts industry. At the beginning a list of criteria will be developed and proposed to align the pertinent standards with the current industry requirements. The focus of this project lies on three parts. First existing and novel approaches to evaluate common appearance algorithms will be evaluated. Second, requirements for process independent characterization data sets, the prerequisite for unified characterization data, will be developed. Third different means for preparing and rending media neutral vector elements such a text and logos will be studied.

Contact: Dr. Andreas Kraushaar 

 

30.036
Extension of the quality assurance system of packaging printers to cover the production of foodstuff cardboard with a barrier layer

Timescale: 01.04.2014 to 31.03.2016
Funding:
Programme of the Federal Ministry of Economic Affairs and Energy for the support of "Industrielle Gemeinschaftsforschung (IGF)" via the German Federation of Industrial Research Associations (AiF)
Partner: Bundesverband Druck und Medien e.V.

The goal of the research project is to extend the quality assurance system for the production of mineral oil free foodstuff packaging so as to evaluate the effectiveness of barrier layers in foodstuff cartons. The project is a continuation of the "Development of a quality assurance system for the production of mineral oil free foodstuff packaging" research project and focuses on the prevention of mineral oil transfer through the application of additional barriers to the carton. The extension has become necessary as a result of new draft regulations from the consumer protection ministry that require a high level of security against the possible transfer of mineral oils from the packaging material used for foodstuff packaging. It will only be possible to fulfill these demanding requirements by using functional barriers on the inner side of the cartons or by using an inner bag with barrier properties inside the cartons.

Contact: Dr. Wolfgang Rauh

 

32.171
Determination of short-term drying related colour changes as a foundation for the establishment of inline measurement in sheet-fed offset printing

Timescale: 01.04.2013 to 30.06.2015
Funding:
Programme of the Federal Ministry of Economic Affairs and Energy for the support of “Industrielle Gemeinschaftsforschung (IGF)" via the German Federation of Industrial Research Associations (AiF)
Partner: Bundesverband Druck und Medien e.V.

Depending upon the combination of materials used, some of the values that are measured and used to control printing undergo significant changes. Since, however, the aim values in the standardization concept relate to completely dry printed specimens, the printer has to take the anticipated changes into account when controlling the press on the basis of freshly printed sheets. Failure to do so may result in the desired colour of the finished printed product not being achieved.
The concluded Fogra research project on, “The impact of drying effects on the values that are measured and used to control sheet-fed offset printing” (Fogra No. 32.157) revealed that especially marked short-term changes occur that stem from the formation of tear threads during ink splitting. However, the findings were exclusively based on laboratory trials and cannot be directly applied to actual printing practice. Since increasing numbers of sheet-fed offset presses are today fitted with inline measurement systems, new investigations should reveal how the measured results change over time under practical conditions and clarify the influences of material, press and application parameters.

 

42.027
Assuring the future of the ISO 2846-1 standard for checking the colour and transparency of inks as a basis for the standardization concept for offset printing

Timescale: 01.10.2013 to 30.09.2015
Funding:
Programme of the Federal Ministry of Economic Affairs and Energy for the support of “Industrielle Gemeinschaftsforschung (IGF)" via the German Federation of Industrial Research Associations (AiF)

Besides knowledge of the paper colour and the tone value increases for defined printing conditions, the standardization of printing processes requires values for the solid colouring of the process inks. The ability to achieve the solid colourings of black, cyan, magenta and yellow is ensured by using certain inks and the requirements for these four colour sets are defined in the ISO 2846 series of standards. Compliance with the standard is tested by means of sample printing devices
on a standardized substrate. Up until now, this test substrate has only been available from one paper manufacturer and it ceased production of this grade in mid 2009 for economic reasons.
The goal of the research project is to support the international standardization work being undertaken for the necessary revision of ISO 2846-1 and to provide a scientific basis therefore. This consists of establishing the foundations for the replacement of the previously specified reference substrate, improving the test method for determining transparency and adding a further quantity, ink gloss, to the standard.

 

52.042
Determination of key data for the standardization of inks for waterless offset

Timescale: 01.01.2014 to 31.12.2015
Funding:
Programme of the Federal Ministry of Economic Affairs and Energy for the support of “Industrielle Gemeinschaftsforschung (IGF)" via the German Federation of Industrial Research Associations (AiF)
Partner: Bundesverband Druck und Medien e.V.

Waterless offset allows the high quality production of both newspapers and other printed products at an economical cost. The disadvantage is that the entire process requires a high degree of standardization, since there are very few options for the printer to intervene in the event of printing problems. Take, for example, conditions in the press ink unit. In order to maintain consistent print quality, it is necessary to install complex temperature regulation systems to keep the working
temperature to within tolerances of ± 0.1 °C, and these consume considerable amounts of energy. The research project will investigate whether the standardization of various ink properties will allow this working tolerance to be broadened.

Contact: Dr. Wolfgang Rauh



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