By using Funori, some weight is added to the fabric, the original colors are not damaged and fabrics are less prone to staining due to the low decompositability and fermentability of Funori (salicylic acid enhances these properties).
ふのりは地質に重みをつけ、色は原色を出し、腐敗発酵のおそれが少なく（サリチル酸を加えればなおよい）ために汚点が生じにくい。