[Regarding] demai: We may make eruvin with it, and we may make shitufei [mevo’os] with it; we utter a blessing over it, and we recite the collective blessing [formula of the Bircas HaMazon] on it; we may separate [tithes from] it while unclothed [and] during twilight. But if one separates maaser sheni [from it] before maaser rishon, it is of no consequence. Oil which the weaver applies to his fingers is liable to the demai [tithing obliga-tion], but that which the carder puts in the wool is exempt from the demai [tithing obli-gation].