12 September 2014 Improved methods for adjusting the UV content of measurement instrument illumination for papermaking industry
Author Affiliations +
Abstract
Optical brightening agents (OBAs) or fluorescent whitening agents (FWAs) are often used additives in paper and board products as they improve both whiteness and brightness of the products. When printed, OBAs can even contribute to colour tone reproduction. Fluorescent emissions of OBAs depend on the UV content of the illuminant (light source). Adequate adjustment (control or adjustment) of UV content of measurement apparatus (e.g. spectrophotometer) is essential for accurate colour measurement and printing colour reproduction. We proposed a method to adjust the UV content against assigned spectra rather than, as adopted in current ISO standards, against single assigned values. Demonstrations of applying this method to the CIE standard illuminants used in papermaking and graphic industries, D65, C and D50 have been given. Thanks to the well-established traceability of reference standards (IRs), the UV contents of a spectrophotometer corresponding to the standard CIE illuminants have been achieved.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Li Yang, Li Yang, } "Improved methods for adjusting the UV content of measurement instrument illumination for papermaking industry", Proc. SPIE 9193, Novel Optical Systems Design and Optimization XVII, 91930R (12 September 2014); doi: 10.1117/12.2059916; https://doi.org/10.1117/12.2059916
PROCEEDINGS
7 PAGES


SHARE
Back to Top