Mikvaos 9:5-6

Mikvaos 9:5

The following are interpositions in the case of utensils: pitch or myrrh on glass utensils, whether on the inside or the outside. If it’s on a table, a board or a couch, it’s an interposition on clean ones but not on dirty ones. It’s an interposition on the beds of homeowners but not on the beds of the needy. It’s an interposition on the saddles of homeowners but not on those of waterskin peddlers. It’s an interposition on a cushion. Rabban Shimon ben Gamaliel says the pitch or myrrh is only an interposition if the stain is the size of an Italian issar (a denomination of coin).

Mikvaos 9:6

If pitch or myrrh is on only one side of clothing, it’s not an interposition; if on both sides, it is. Rabbi Yehuda says in the name of Rabbi Yishmael that it’s also an interposition on one side. Rabbi Yosi says that it’s an interposition on builders’ clothing even on one side but it’s only an interposition on the clothing of the ignorant when it’s on both sides.