What are the ANSI Z87.1 requirements?
Requirements include:- Optical Quality: Defects on protector lenses must be kept to a minimum.
- Luminous Transmittance: At least 85% of light must pass through lenses.
- Haze (clear lenses only): Haze of lenses should not exceed 3%.
- Refractive Power, Astigmatism, Resolving Power, Prism, and Prism Imbalance: The table below explains specific requirements.
- Drop Ball Impact Resistance: Protector must withstand a steel ball with a mass of 2.4 oz (~68 g) dropped from 50 in (127 cm) above the sample.
- Ignition: All materials on protector should not catch fire or glow when exposed to a metal rod at 650°C (1202°F) for 5 seconds.
- Corrosion Resistance of Metal Components: Any metal surfaces on the protector are submerged in a boiling saline solution for 15 minutes and left to dry for 24 hours. They should not show any signs of damage or corrosion.
What is ANSI z87+?
The basic ANSI Z87.1 regulations are adequate for ordinary conditions and protection. Yet, some environments may need additional impact and penetration protection. The ANSI Z87.1+ describes requirements for impact-rated devices that provide a higher protection level. Impact-rated protectors are labeled with a Z87+ on the lens. Protectors must pass further testing to earn the Z87+ label. In addition to the visual requirements, ignition test, and corrosion test, impact-rated tests include:- High Mass Impact: Protector should withstand a pointed object with a mass of 500 g (17.6 oz) dropped from 50 in (127 cm) above. The test is performed between the eyes and on each side.
- High-Velocity Impact: Small mass objects are propelled at the protector over 20 times. The chart below explains specific details.
- Penetration: A needle weighing 44.2 g (1.56 oz) is dropped from 50 in (127 cm above) between the eyes of the protector.