这种分散液用于造纸施胶，比马来松香皂化胶节省松香和硫酸铝各30 ~ 40%，是一种很有发展前途的新型胶料。

It can be used as a size and has good sizing effect, it can save 30 ~ 40% rosin and than conventional modified rosin size.

youdao

内施胶：纸浆在打浆或精磨时，加上松香、明矾或淀粉等胶料，使完成的书写或印刷用纸没有洇墨情况。

Intirnal sizing: Rosin, alum or starch sizing introduced into the papermaking stock at the beating or refining stage to prevent ink spread on printing and writing paper.

youdao