Is the questioner asking "what are the white lumps growing inside persimmon vinegar"? Membrane-producing yeasts and molds. According to the query health guide website, persimmon vinegar long white film, is the result of film-producing yeast and mold, because mold and yeast prefer acidic reaction, so it can make the vinegar mold. Persimmon vinegar is a kind of vinegar brewed from ripe persimmons.