also: あいし
interleaf; slip sheet; paper between prints
A sheet of paper placed between freshly printed pages to prevent ink transfer or smudging. Used in printing and publishing contexts.
At the printing shop, they insert interleaves between freshly printed pages.
This book uses slip sheets to protect the illustrations.
Compound of 間 (あい, 'between') and 紙 (がみ, 'paper'), literally 'between-paper'. The reading あいし uses the on'yomi of 紙.