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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Development of Decolorizing Method for Color Ledger

색지 폐지의 탈색에 의한 표백펄프의 재생방법

  • 윤병태 (한국화학연구소 펄프제지연구센터) ;
  • 류정용 (한국화학연구소 펄프제지연구센터) ;
  • 신종호 (한국화학연구소 펄프제지연구센터) ;
  • 송봉근 (한국화학연구소 펄프제지연구센터) ;
  • 김태준 ((주)날코 코리아) ;
  • 전양 (충남대학교 농과대학 임산공학과)
  • Published : 2000.06.01
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Abstract

This study was to get the optimum conditions on bleaching by mixing of various colored ledgers with white ledger by 50：50 ratio. This bleaching was carried out by two steps, reductive-oxidative process was shown a better brightness compared to oxidative-reductive one. Especially, in reductive bleaching using sodium hydrosulfite, the aging temperature should keep above 6$0^{\circ}C$ irrespective of aging time, alkaline condition was more effective than acid one. Final brightness after bleaching and feinting was obtained over 78% to be used by the raw pulp of tissue.

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References

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