Effects of ultraviolet radiation on the color of compounded papers containing wasted tea leaves

Tetsuya Takahashi, Wakako Kasai, Tetsuo Kondo

Research output: Contribution to journalArticle

Abstract

Influence of ultraviolet irradiation on papers containing wasted tea leaves was studied. Ultraviolet irradiation generally caused reddish coloration. Irradiation under dry atmosphere caused stronger coloration than under ambient conditions. Presence of oxygen did not cause significant difference in coloration. Thin-layer chromatographic analysis showed disappearance of chlorophylls a and b, and did not disappearance of theaflavin by UV irradiation. The results strongly suggest that the coloration is caused by photochemical conversions of catechins to reactants (theaflavin-like compounds).

Original languageEnglish
Pages (from-to)261-266
Number of pages6
JournalJournal of Fiber Science and Technology
Volume66
Issue number10
DOIs
Publication statusPublished - Jan 1 2010

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Materials Science (miscellaneous)
  • Polymers and Plastics
  • Industrial and Manufacturing Engineering

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