The penetration ability of ultraviolet rays is not strong. Generally speaking, a thin layer of cloth is unstoppable. This is because ultraviolet light has short wavelength and high energy, and can easily penetrate many substances, including air, water and ordinary glass. However, some special materials, such as timely and plastic, can effectively block ultraviolet rays, so if it is necessary to prevent ultraviolet rays from harming human body, these special materials can be selected as barriers.
In short, only special materials can effectively block ultraviolet rays, while ordinary materials such as cloth cannot completely block ultraviolet rays. Therefore, appropriate protective measures must be taken to ensure personal safety when working with ultraviolet rays.