该实践认识到，需要对16毫米和8毫米电影胶片进行表面处理，以降低胶片表面摩擦系数，从而提高良好的投影性能。使用这种处理方法应能提高稳定性，降低投影仪门的噪音，减少在投影过程中穿孔损坏的倾向。

This practice recognizes that surface treatment of 16- and 8-mm motion-picture prints to reduce the film surface friction coefficient is needed to promote good projection performance. The use of such treatment should result in increased steadiness, reduction of noise in the projector gate, and less tendency toward perforation damage during projection.