2 processing method:
1). Loofah sponge: washed, dried and cut into sections.
2). Stir-fry the loofah sponge: take the loofah sponge cut into small pieces, stir-fry it with bran until it is yellow, take it out, and sieve off the bran.
3). Charcoal of towel gourd: Take the towel gourd cut into small pieces, put it in a pot (full), cover it with a pot of the same size, seal the combination of the two pots with yellow mud, then fire it for about 4-5 hours, stop the fire (generally, put white paper on the bottom of the pot, and take it out after cooling).
3 loofah sponge
has a long cylindrical shape or a long shuttle shape, slightly curved and thinner at both ends. The length is about 25 ~ 6 cm, and the middle diameter of loofah is about 6 ~ 8 cm. The surface is white or yellow-white, and the whole system is a net made up of multiple layers of filamentous fibers. Light and tough, it can't be broken. The transverse section shows that the ovary has 3 cells, forming 3 large cavities with a few remaining black seeds. No breath, light taste. It is better to be thin, tough, white and skinless.