noun
gold leaf; gold foil; beaten gold
Thin sheets of gold used for decoration, crafts, and gilding.
仏像に金箔を貼る。
Apply gold leaf to a Buddhist statue.
金箔が施された屏風はとても美しい。
A folding screen decorated with gold leaf is very beautiful.
金 (きん) is the general word for gold as a metal or color, while 金箔 specifically refers to gold that has been beaten into thin sheets.
Compound of 金 (きん, 'gold') and 箔 (はく, 'foil, leaf'). The reading はく becomes ぱく due to rendaku.