Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Effects of Artificial Thermal Aging on Variations in Color of Commercial Papers

건열처리 인공노화가 시판지의 색상변화에 미치는 영향

  • Choi, Eun-Yeon (Dept. of Paper Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Lee, Yong-Kyu (Dept. of Paper Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Cho, Byoung-Uk (Dept. of Paper Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University)
  • 최은연 (강원대학교 산림환경과학대학 제지공학과) ;
  • 이용규 (강원대학교 산림환경과학대학 제지공학과) ;
  • 조병욱 (강원대학교 산림환경과학대학 제지공학과)
  • Received : 2014.08.14
  • Accepted : 2014.08.22
  • Published : 2014.08.30
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Abstract

Effects of artificial thermal aging on color variations of various commercial papers (fine paper, coated paper, newsprint and filter paper) were investigated. With thermal aging at $105^{\circ}C$, most of papers showed a special trend in $a^*-b^*$ plane: the $a^*$ (red-green) values of the samples were initially reduced (heading to - $a^*$ side) and after a turning point they increased to +$a^*$ side while the $b^*$(blue-yellow) values were kept increased to +$b^*$ side (yellowing of paper). Different papers had different turning points for $a^*$ value. The filter paper consisted of a pure chemical pulp and the copy paper with OBA (optical brightening agent) showed the latest turing points. In addition, the papers without OBA showed less reduction in brightness compared with that with OBA, suggesting that OBA could adversely influence the brightness stability during thermal aging.

Keywords

References

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