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. Also called Engine sizing.

• 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。亦称机内施胶。