Washing soap for najis (unclean things) is the result of a collaboration between PPNN ITB (Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung) and PT. RIN (Rumah Inovasi Natura) was created to make it easier to clean najis (unclean things) on the body and clothes when someone comes into contact with that. This soap contains kaolin, which is a clay material native to Indonesia and can be mixed with soap to purify najis (uncleanness).