Color modification of black locust depending on the steaming parameters

László Tolvaj, Sándor Molnár, Robert Németh, Dénes Varga

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

In this study wet and dried black locust (Robiniapseudoacacia L.) wood samples were steamed under laboratory conditions to determine the parameters for proper color changes. The color change was evaluated by objective color measurement and color data were presented in CIE L*a*b* color co-ordinate system. Through the change of steaming parameters (steaming time and temperature), a large diversity of colors for black locust wood can be created from greenish yellow to dark brown. This change is highly sensitive to the temperature and duration of the treatment. If a specific color is desired, the proper process parameters have to be set and monitored carefully. The color change of dried wood material is slower at the beginning of the steaming than that of wet wood at low temperature. The color change of dry and wet black locust samples are similar above 95°C, therefore the steaming of dried black locust wood is recommended above this temperature value. Experiments refute that the robinetin plays the main roll in the creation of brown color during steaming.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalWood Research
Volume55
Issue number2
Publication statusPublished - Aug 9 2010

    Fingerprint

Keywords

  • Black locust
  • Cie l*a*b* system
  • Color change
  • Steaming
  • Steaming parameters

ASJC Scopus subject areas

  • Forestry
  • Materials Science(all)

Cite this

Tolvaj, L., Molnár, S., Németh, R., & Varga, D. (2010). Color modification of black locust depending on the steaming parameters. Wood Research, 55(2), 81-88.