Recycling old telephone directories

Bangji Cao, Oliver Heise, Ulrike Tschirner, Shri Ramaswamy

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Old telephone directories (OTD) contain excellent fibers, with a mean length that is higher than that for fibers from old newsprint (ONP). The increased use of this material is hampered by two critical issues, including, printing ink and the bleachability of yellow pages. A new laboratory flotation cell that has good runnability and efficiency serves to solve these issues.

Original languageEnglish (US)
Number of pages1
JournalTappi journal
Issue number1
StatePublished - Jan 1 2001

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