施胶纸 meaning in Chinese

sized paper

Slack sized paper
轻施胶纸
The " four treasures for the study " ( paper , brush , ink stick and inkstone ) are flanked by a statue of cai lun and drawings demonstrating the process of papermaking with a fragment of the oldest " sized paper " survived from later qin ( ad 384 ) as the backdrop
票中右方为造纸流程图，文房四宝居中，后方的后秦白雀元年（ 384年）施胶纸，是现存最早涂有黏结剂的古纸。