Partie 1: Impression lithographique offset sur feuilles et à bobines. STANDARD. ISO. Third edition. Reference number. ISO (E). ISO is an international standard used to determine color and transparency conformance of four- color lithographic printing inks. determining if “High Tack Bengal Process Series” inks conformed to ISO ISO – was performed using an IGT Printability Tester. The four inks were.
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For multi-colour printing the inks are mixed by printing primary colours over or next to each other in solid and screen areas. In general, the number of primary colours is optional; for economic reasons, however, not too many primary colours should be used.
There are some colour systems on the market which work with up to seven colours in order to display the widest possible colour space. The four-colour system has established itself in the main printing procedures, however. The usage of defined process printing inks with fixed properties in terms of colour is one of the most important preconditions to achieve reproducible print results.
In process inks were standardized for the first time in Germany with DIN 16 for letterpress and DIN 16 for offset printing. In order to achieve better fastness properties, for example alkali or light fastness, a group of experts from the CEPE European Council of producers and importers of paints, printing inks and artists colours recommended the standardization of a new ink series, in The term for this new series was European colour scale or sometimes shortened to European scale.
This colour definition was stipulated in standard DIN 16 In complete accordance with the European colour scale, the international standard ISO was published in The colours cyan, magenta and yellow also correspond to this standard. The revision for offset printing is complete with the present standard ISO It was very difficult to define the colorimetric nominal values which are to be the future chromaticity coordinates of the standardized printing inks, as values had to be found that were acceptable to all experts from the various economic areas.
For Europe, the average values of more than 60 current process inks from different producers were generated. This also applies as the standard for sheet-fed offset.
As process printing inks have to show sufficient transparency for the functioning of multi colour printing, corresponding values have been stipulated in ISOwhich may not be undercut. For the evaluation of the transparency, several printing samples with graduating ink film thicknesses are to be printed on black substrate.
In case a printing ink is not totally transparent, the light that touches the print sample during observation or colour measurement is increasingly scattered according to higher ink film thickness.
That means that the difference between printed and blank black kso. If the colour distance between printed and blank black is put down as function of the ink film thickness, a line arises whose inclination is low at a high transparency of the printing ink and higher if the transparency is lower.
At complete transparency sometimes to be found with cyana horizontal line shows. The inclination is then 0.
The reciprocal value of the inclination of the line of best fit by the measuring points, describes the extent of transparency. Compliance with the standard is given if the measured values do not exceed the stipulated value of transparency.
ISO 2846 Conformance Tested Ink & Suppliers
Colour values for black were also included in the new standard. The colour values determined in the standard are a further approach to standardise offset printing. Print products should be produced and also reproduced, again and again, all over the world, with the same results.
According to our measurements, the most common ink series, especially ours, are at least very close to the nominal value and mostly within the given tolerances.
In practice, however, this means that when launching colour management, the already used ink series in the print shop should serve as reference considering the commonly used full tone densities in the print shop.
These series are produced by us with utmost care isp are delivered with the lowest colour metric fluctuations. Information on standard ISO For multi-colour printing the inks are mixed by printing primary colours over or next to lso other in solid and screen areas. Colour values It was very difficult to define the colorimetric nominal values which are to be the future chromaticity coordinates of the standardized printing inks, as values had to be isk that were acceptable to all experts from the various economic areas.
ISO Conformance Tested Ink & Suppliers | Printing Industries of America
Europe For Europe, the average values of more than 60 current process inks from different producers were generated. Input values and average ISO value for magenta.
Input values and average ISO value for yellow. Input values and average ISO value for cyan transparency. Transparency As process printing inks have to show sufficient transparency for the functioning of multi colour printing, corresponding values 22846-1 been stipulated in ISOwhich may not be undercut.
Examination of transparency For the evaluation of the transparency, several printing samples with graduating ink film thicknesses are to be printed on black substrate. Measurement geometry Standard illuminant: This technical instruction sheet is designed for your information and reference.
It is based on and conforms to our current knowledge. However as actual application is affected by many 2486-1 over which we have no control, we are not liable for printing failures.