Optical analysis of extractive materials distribution in wood densification

Abstract

Lignin considered as one of extractive materials in wood densification process. During preheating and in wood densification process, lignin might flow and distributed in a temperature range of 127 °C to 176 °C, and water in wood pores might increase extractive materials flowability in wood. Crossectional extractive materials distribution was measured and quantify optically. Relationships between temperature and extractive materials distribution were discussed briefly in an aim to improve densification methodology.