Gloss and gloss variations in electrophotographic print = Glans och glansvariationer i elektrofotografiskt tryck

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This degree project was performed at M-real Technology Centre in Örnsköldsvik. The perpose was to investigate the differences in gloss and gloss variations between chemical and ground toner and different paper grades in electrophotographic prints. Gloss is a property that gives the impression of a higher quality of a product. Therefore it is of great importance to accomplish high gloss in advertising print. A test chart was printed on three different uncoated paper grades on three different printers. Thereafter, gloss, gloss variation, surface topography, print mottle and density were measured. A visual evalution was also performed. A multivariate analysis was acheived of the data in order to find correlations between the measured variations. The results showed that paper grades with large surface roughness gave more variations in surface topography and gloss variations (both visual and measured) in print. A rough surface also gave more print mottle. Groun...