Since the metal mould has many tiny small holes for steam to pass through in order to soften the crispy dry tea leaves before compression, there will be a lot of nails left behind after the strong compression.
Since the metal mould has many tiny small holes for steam to pass through in order to soften the crispy dry tea leaves before compression, there will be a lot of nails left behind after the strong compression.
由于铁模上面有许多小孔，用意是给蒸茶的蒸气通过，好使乾脆的茶叶软化，因此蒸压之后就留有乳钉。