The color of the black wattle extract became lighter through using the fresh bark.Furthermore the decolored extract meeting abroad standards can be given out by a decoloring treatment.

• 利用新鲜树皮能够改善黑荆树栲胶的颜色,树皮越新鲜,生产出来的栲胶颜色越浅。通过脱色处理,能达到国外脱色栲胶颜色的要求