Fig. 8

Construction of kenaf retting system.The bottom layer of brown-yellow filamentous band is the coiled kenaf bast, the middle green ribbon is scattered kenaf bast, and the block above is stone. With scattered kenaf bast and stones press on coiled kenaf bast, so that coiled kenaf bast is completely submerged in the pool water for up to 34 days of retting, and kenaf retting liquid was collected for sample at 0 days, 10 days, 20 days and 34 days respectively