Protective glasses and face shields are a kind of personal protective equipment, mainly to protect the eyes and face from dust, smoke, metal and gravel debris and chemical solution splash damage, some special protective glasses or face shields It can also prevent electromagnetic waves such as ultraviolet, infrared, and microwave from radiating the human body's face. So, what is the difference between these two?
  Protective glasses are usually made of flexible plastic and rubber, and the frame is wide enough to cover the user's eyes. Protective glasses are mainly divided into three categories: anti-solid dust impact, anti-liquid splash and anti-radiation.
  1. Protective glasses of the anti-solids category are mainly used to prevent mechanical damage to the eyes such as metal or sand and gravel debris. The spectacle lens and spectacle frame should be strong in structure and anti-shock. There should be venting holes around the frame. Protective lenses can be tempered glass, glue-bonded glass or copper wire mesh protective glasses.
  2. Protective glasses against chemical solutions are mainly used to protect the eyes from chemical damage caused by irritating or corrosive solutions. Ordinary flat lenses can be used, and the frame should be covered to prevent the solution from splashing.
  3. Radiation-proof protective glasses are used to protect the eyes from excessive ultraviolet rays and other radiation rays. The lens is made of special glass that can reflect or absorb radiation, but can transmit a certain amount of visible light. The lens is plated with bright chromium, nickel, mercury or silver metal film, which can reflect radiation; the blue lens absorbs infrared rays, the yellow-green lens absorbs both ultraviolet and infrared rays, and the colorless leaded lens absorbs X-rays and rays.
  Types of protective masks
  A mask that prevents group debris and chemical solutions from splashing into the eyes and damaging the face. It is made of lightweight transparent plastic, mostly polycarbonate and other plastics. The sides and lower ends of the mask extend to the ears and the lower forehead toward the neck respectively, making the mask It can cover the face more integrally to enhance the protective effect.
  In addition to the aluminum foil mask mentioned in the heat-resistant clothing, the heat-protection mask can also be made of single-layer or double-layer metal mesh, but a double-layer is better, which can shield part of the radiation and dissipate in the air. If it can be plated with chromium or nickel, it can enhance the reflection and heat-proof effect and prevent rust.
The metal mesh mask can also prevent microwave radiation.
  The mask for electric welders is made of a certain thickness of hard paper fiber, which is light in weight, heat-resistant, and has good electrical insulation. The big difference between protective goggles and protective visors is that protective goggles can only protect the eyes; and protective visors can protect the entire head of the human body.