How is plywood made from layers of veneer?

Plywood is a structural material created by bonding thin sheets of wood, known as veneers or plies, using adhesive.1

The manufacturing process involves several key steps:

• Layering: Veneers are stacked with their grain directions typically oriented at wide or perpendicular angles to one another. This alternating grain pattern provides the material with its characteristic strength and resistance to warping or splitting.1
• Assembly: The layers are organized into a face, a back, a core, and intermediate layers called crossbands. Most standard plywood is constructed with an odd number of layers to ensure symmetry.1
• Bonding: The assembled plies are coated with glue—usually thermoset synthetic resins like phenol-formaldehyde or urea-formaldehyde—and placed into heated, high-powered presses.1
• Curing: The heat activates the resins, which permanently bond the veneers together into a durable, flat panel.1

For specialized applications in furniture, such as molded plywood, veneers can also be bent and shaped while being glued to create curved forms.1