F20 is a solvent-free, medium-viscosity, high-precision photopolymer resin for LCD 3D printing. Suitable for laser and LED light sources, it cures within seconds under 385nm and 405nm exposure. The formulation effectively suppresses light penetration to prevent deep curing, achieving a minimum layer thickness of 0.025mm and high forming accuracy. It features fast curing, low odor and low irritation, and after forming produces a smooth, transparent surface with high strength. Its khaki color produces beautiful printed models, making it especially suitable for printing avatars and figurines.