This base type goes back to the lat. designation of the concept CLOTH (cf. Georges under pānnus), which has also been preserved in Italian (cf. Treccani under panno). The development of the meaning 'skin, layer that forms on the surface of a liquid when it cools down or is left exposed to air' is easily traceable. This also explains ita. panna, fur. pane 'cream', as the cream settles on the milk like a blanket when left sitting (cf. DELI 4: 871, Treccani under panna with the verbal derivative pannare 'to settle cream'). A similarly motivated metaphor can be found in the case of tēla.