,Study on Impacts of pH Value on Paulownia Wood Color

• 作 者: CHANG Delong SONG Zhanqian HU Weihua HUANG Wenhao LI Fuhai ZHANG Yunling
• 机 构: Paulownia Research Center of China, Zhengzhou 450003, P.R.China“,”Research Institute of Chemical Pro
• 出 处: 中国林业科技（英文版）
• 发表日期: 2006年1期
• 关键词: paulownia wood anti-stain decolor

Impacts of acid and alkali on paulownia wood are studied, and the effects of weak alkali solution on stain prevention of paulownia wood are tested and analyzed. It shows that pH value affects paulownia wood color, and that white value of paulownia wood is prone to decrease and chromatism rises under acidity condition. Under alkalescence condition, whiteness of paulownia wood rises and chromatism decreases, color and luster obviously tend to be bright. The alkali solution with concentration of 0.25% can promote the penetrability of paulownia wood, dissolve some extractives containing stain precursor chemicals, strengthen stain prevention of paulownia wood, but can not contaminate board surface. Anti-stain reagent has effect on prevention stain of paulownia wood, but only using it for controlling paulownia wood stain will induce stain-retuing phenomenon. Using both weak alkali solution and anti-stain reagent has better effect than just using reagent, the treatment by concentration of 0.25% weak alkali solution with anti-stain reagent can make controlling effect even both inside and outside.