감즙을 먹인 옷감을 물에 적셔 햇빛에 말리는 과정을 며칠 동안 반복하면 감물 색이 점점 짙어져 갈색으로 물들여진다.
If the process of soaking and drying the persimmon juiced-cloth in the sun is repeated for several days, the color of the persimmon juice becomes darker and turns into brown.