Login

Login




Registration.
. Forgotten password?
.

Your contact

Jürgen Gemeinhardt

Jürgen Gemeinhardt

Head of department
Printing techniques

E-mail
gemeinhardt
transparent 11x15@fogra.org

Telephone
+49 89. 431 82 - 256

.

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: Andreas Kraushaar 

 

32.164
Reduction of the colour fluctuations in sheet-fed offset printing with conventional and UV inks

Timescale: 01.02.2012 to 31.07.2014
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)

The goal of this research project is to clarify the causes of the tone value differences that are often observed over the printed format as well the fluctuations from job to job. It also aims to show how large these effects are under practical conditions. These findings will then be used in order to recommend sensible tolerance guidelines that could be incorporated into the ISO 12647-2 standard.
Methods are to be presented that allow a quantitative prediction of the tone value fluctuations to be expected on the basis of the motif. To this end, correlations with the printing dot area percentage and the material properties should be determined. Particular attention is to be paid to the differences between conventional and UV inks, damping solution with and without isopropanol as well as substrates with various absorption capacities.
A detailed analysis of the allowable damping solution latitude should allow detailed statements to be made about the stability of the printing under different prevailing conditions. This will allow practical recommendations to be made and difficulties to be avoided from the outset. When using relatively difficult UV inks in particular, established laboratory tests should assist in making an optimum choice of material.

 

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 31.03.2015
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: Wolfgang Rauh



.
.

xxnoxx_zaehler