油纸

油纸	yóu zhǐ	oilpaper
油	yóu	oil / fat / grease / petroleum / to apply tung oil, paint or varnish / oily / greasy / glib / cunning
纸	zhǐ	variant of 纸
纸	zhǐ	paper (CL:张,沓) / classifier for documents, letters etc