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In addition, a modular Monte Carlo simulation tool, Open PaperOpt, is developed to allow future spatial- and angle-resolved particle level light scattering simulation. The perceived whiteness of patches with identical tristimulus values was highly dependent on the shade of the induction field and the patch size did not significantly affect the perceived whiteness. It is shown that the linear CIE whiteness equation fails to predict the perceived whiteness of highly white papers with distinct bluish tint. Increased FWA concentration leads accordingly to increased whiteness. Par Interracial Fitta Creampie. Porn 3 free Hence, the fluorescence efficiency is essentially dependent only on the ability of the FWA to absorb light in its absorption band.

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It is shown that the quantum efficiency of two different fluorescent whitening agents FWA in plain paper is rather constant with FWA type, FWA concentration, filler content, and fibre type. Beeg sex porn A red-ward shift of the quantum efficiency is observed with increasing FWA concentration, but this is shown to have a negligible effect on the whiteness value. In this study the perceived whiteness of white patches surrounded by induction fields of different shades was evaluated by asking observers to give a magnitude estimate of perceived whiteness of the patches in comparison to a white reference. Hd video sex Sexig hennes kan Hon suger och Detta Avsugning Blow jobb. Several studies have demonstrated the simultaneous contrast effect that makes the appearance of coloured patches depend on neighbouring colours.

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