How thick is the skin of an onion ?
63 µm (microns.)
Ten strips of the outer skin (tunic) of an onion were piled up and folded double to give twenty thicknesses. This booklet was measured with a micrometer and discovered to be one point two six millimetres thick. The mean thickness of a single layer of onion skin in this experiment was therefore sixty-three microns.
Ten strips of the outer skin (tunic) of an onion were piled up and folded double to give twenty thicknesses. This booklet was measured with a micrometer and discovered to be one point two six millimetres thick. The mean thickness of a single layer of onion skin in this experiment was therefore sixty-three microns.