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김선경(Sun-Kyung Kim),최은연(Eun-Yeon Choi),이용규(Yong-Kyu Lee),조병욱(Byoung-Uk Cho) 한국펄프·종이공학회 2011 한국펄프·종이공학회 학술발표논문집 Vol.2011 No.4
Effects of thermal aging on color variations of various papers were evaluated. With thermal aging, most of papers showed a special trend in a*-b* plane: a*(red-green) values of the samples were reduced at beginning and after a turning point it was increased while b*(blue-yellow) was kept increased (yellowing of paper). In case of filter paper which consists of chemical pulps, the changes in a*value was occurred late compared with other samples. In case of the copy paper with optical brightening agent, the turning point in a* was not observed while a constant increase in b* was observed. In case of color paper, no specific trends in a*b* were found.