noun, noun which may take the genitive case particle 'no'
one side; single-sided
Refers to one side of a two-sided object, such as paper, a record, or a coin. Often used in compound phrases like 片面印刷 (single-sided printing).
この書類は片面だけ印刷してください。
Please print this document on one side only.
片面が赤く塗られた板を見つけた。
I found a board painted red on one side.
両面 means 'both sides', while 片面 means 'one side/single-sided', as in 両面印刷 vs 片面印刷.
片面 describes something usable on only one side, the opposite of リバーシブル, which can be flipped and used on either side.
single-sided disk
Compound of 片 (かた, one of a pair) and 面 (めん, surface, side). The reading かためん follows standard on'yomi.