1. Material: Cardboard
2. Weight: About 500 grams
3. Dimensions: 29 x 42 cm
4. Thickness: About 0.36 cm
5. Without hand support, can stand independently and save time and effort
6. The angle can be adjusted at will, more portable
7. Silver side: Dark side fills in light, brightens the shadow part, compared with white, the intensity of reflection is greater
8. Black surface: Used to edge or weaken the dark surface light, deepen the backlight surface, and increase the picture contrast
9. White surface: Dark surface fills in light, brightens the shadow part so that the object receives the light evenly, softer than the silver surface
