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122 INK STABILITY DURING PRINTING TAGA JOURNAL VOL. 2 2005 SWANSEA PRINTING TECHNOLOGY
 

Summary: 122 INK STABILITY DURING PRINTING
TAGA JOURNAL VOL. 2 2005 SWANSEA PRINTING TECHNOLOGY
Ink Stability During Printing
Andrea Frimova**, Alexandra Pekarovicova*, Paul D. Fleming* and Jan Pekarovic*
* Center for Ink and Printability
Department of Paper Engineering,
Chemical Engineering and Imaging
Western Michigan University
** Flint Ink
Ann Arbor MI
Abstract
It was found that particle sizes of ink pigments change after several hours of printing in
such a way, that it affects printability properties. This was demonstrated on several
gravure and flexo printing trials lasting for several hours. Both rotogravure toluene-based
process inks and flexo water-based inks exhibited changes in pigment particle size.
Decrease of rotogravure inks particle size was most obvious in black (from 482nm to
231nm), while the decrease of particle size in all other colors was rather similar: from 257
to 173 (yellow), from 270 to 193nm (magenta) and from 282 to 207nm (cyan).
Differences in color, print density, and specular gloss measured on printed substrates at
the beginning of trial and after seven hours of printing were found. Color changes were

  

Source: Abubakr, Said - Department of Paper Engineering, Chemical Engineering, and Imaging, Western Michigan University

 

Collections: Engineering