合あい紙し

noun

slip sheet; interleaving paper

Technical term in printing: a sheet placed between printed pages to prevent ink transfer or sticking.

• 印いん刷さつ後ご、合あい紙しを挟はさんでインクの裏うら移うつりを防ふせぎます。

  After printing, slip sheets are inserted to prevent ink set-off.