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 panlownia wood color, and...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 panlownia 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 panlownia 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-returning 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.展开更多
文摘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 panlownia 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 panlownia 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-returning 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.
