Relationship between microgloss uniformity and surface texture of paper.
Published: 2005
Language: eng
Number of pages: 111
Description: A customized setup was used to measure the microgloss nonuniformity of paper. This setup can characterize gloss uniformity of an area of one square centimetre at a resolution of 16 x 16 mum2. Beckmann's light scattering model for random rough surfaces was successfully applied to describe the relationship between the surface texture parameters and the microgloss nonuniformity of a large range of coated and uncoated papers. The model, based on the Kirchhoff approximation, suggests that the variation in specular reflectance (gloss) depends only on the RMS roughness, sigma, and on the correlation length, T, of the surface height of the samples. The topography of the paper surfaces was obtained using a WYKO surface profiler. Results indicated that the relationship between the variance of microgloss followed the prediction of the Beckmann's model well. The variance of microgloss was found to be linearly dependent on a dimensionless parameter   Ts  for most of the samples studied. However, the dependence of the natural logarithm of the average microgloss on the square of rms roughness was nonlinear differing from the model prediction.
Notes: Source: Masters Abstracts International, Volume: 44-01, page: 0434.

Thesis (M.A.Sc.)--University of Toronto, 2005.

Electronic version licensed for access by U. of T. users.

ROBARTS MICROTEXT copy on microfiche.