Spectral Color Prediction by Advanced Physical Modelling of Toner, Ink and Paper, with Application to Halftoned Prints
The wavelength dependent radiation transfer properties of ink or toner are determined by means of physically modelling the ingredients. The resin is described using optical constants, whereas the dyes use an absorption coefficient, and fluoresent re-emission probabilities. The scattering and absorption properties of pigments are described by the Mie theory, using realistic optical constants and particle size distributions.
Knowing the radiation transfer properties of the used materials, geometric objects like dots or layers are illuminated by a light source with adjustable spectral and directional characteristics. The angle and wavelength dependent reflectance and transmittance are obtained. The simulated reflection spectra agree well with measured data. Finally we combine printed patterns with a paper model containing scattering and fluorescent properties. In this way reflection spectra of printed samples are modelled succesfully.
The chosen approach is unique and more powerful than standard methods like Kubelka-Munk. Former difficult aspects of color prediction like surface gloss, angledependent scattering and fluorescence of dyes are an intrinsic outcome of this new model. The model is appropriate to make an accurate color prediction of halftoned prints.
Document Type: Research Article
Publication date: January 1, 2003
For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.
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