What is black film faced plywood?

As the name implies, it is a plywood covered with a film. The film covered board is mainly used for construction and cement pouring. That layer of film is not easy to bond with cement. The building formwork is used on the construction site, mainly the formwork used for concrete cast-in-place-----the material is divided into wood formwork, steel formwork, bamboo formwork, machine-pressed board, etc.

Plywood is a three-layer or more thin plate made of logs that are cut into veneers or sliced into veneers, and then glued together with adhesives. Usually, odd-numbered veneers are used, and the fiber directions of adjacent layers of veneers are aligned perpendicular to each other and glued together. Therefore, there are odd-numbered layers of plywood such as three-height, five-height, and seven-height.