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Measuring the Transmittance of Transparency Print using a Reflectance Measurement Instrument

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This paper describes a method to derive spectral transmittance data from spectral reflectance measurement data. The model was verified with colors of the IT8.7/3 color charts. The spectral reflectance of printed colors was measured with an automated reflectance measurement system by placing the transparency sheet on the measurement table with paper backing. The spectral transmittance of these color patches was also measured manually for comparison. The combined transparency and backing reflectance data were used to derive the transmittance data based on a special model. The CIELAB color differences between the model-derived transmittance data and the actual measured transmittance data were computed. The average, maximum and standard deviation of CIELAB color differences between the model-derived data and the actual transmittance data for the 928 colors were found to be 1.6, 8.7 and 1.21, respectively. There were generally larger deviations for darker colors due to lower signal noise ratios.
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Document Type: Research Article

Publication date: 2000-01-01

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  • 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.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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