Is the reflector for photography a kt board?

It's the kt board. The reflector is an auxiliary lighting tool used in shooting, also called kt board, which is made of materials such as tin foil paper, white cloth and rice paste, so the reflector used in shooting is kt board. The reflector plays the role of auxiliary lighting outside the scene, and sometimes it is also used as the main light. Different reflective surfaces can produce different soft and hard light. The smaller the reflector area, the worse the effect.