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VERSION:2.0
PRODID:-//Memento EPFL//
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SUMMARY:Models of light diffusion within prints
DTSTART:20090629T141500
DTSTAMP:20260407T130042Z
UID:e63d3f946a65ed088a6fc61e446b0ed439c81f597c9b2cf5b55056c0
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Jean-Francis Bloch\, Institut National Polytechnique de Gre
 noble\nPaper is a well known material as it is used every day\, at least f
 or\nprinting or read a newspaper. However\, it exists for many other appli
 cations\, such as filter\, blotter\, bank note\, cigarette or tracing\npap
 ers. Classically\, the expected end used properties do depend on the\ncons
 idered application. However\, they consist usually in a compromise\nbetwee
 n the needed mechanical properties and the desired optical\nproperties. Es
 sentially\, colour gloss\, opacity and brightness (and/or\nwhiteness) are 
 the main optical properties taken into account.\nHowever\, these optical p
 roperties do depend on the structure of the\nfibrous network constituting 
 paper. Therefore\, it is essential to be\nable to describe the 3D structur
 e of paper in order to understand and\nanalyse its optical properties. Fur
 thermore\, this 3D structure and its\nrelation with a fluid\, such as ink\
 , are of major interest for many\napplications. Consequently\, we will fir
 st present first the 2D characterisation of paper\, in order to explain th
 e relation between topography and gloss. Then the analysis of the penetrat
 ion of ink will be exemplified using different experimental techniques. Ho
 wever\, as fluid flows involve the 3D structure of paper\, we will present
  experimental results of 3D structure obtained at the European Synchrotron
  Radiation Facility (ESRF\, Grenoble) using X-Ray microtomography. The aim
  is here to characterise the 3D structure. Some example of paper structure
 s will be presented including the description of both the fibrous structur
 e and the fillers that modify the paper’s optical properties. ...
LOCATION:BC-01
STATUS:CONFIRMED
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