Hazard Signage

Any laboratory using a Class 3B and/or Class 4 laser is required to have a hazard communication posting at each entrance to the laser use area. Please use the Hazard Sign Template [PDF].

The required warning information must be on the posted sign:

  • Highest class laser in use
  • Signal word (Danger)
  • Operating wavelength(s)
  • Eyewear filtering specifications (Optical Density, OD) for each operating wavelength. The Laser Institute of America Eye Protection Selection Calculator may be a useful tool in selecting the correct OD of safety eyewear.
  • Emergency contact information
  • Instruction on entry