How are safety lenses marked?
Similar to plano safety frames, the prescription safety frame must be stamped with the manufacturer's mark or logo, as well as the designation of standard – whether Z87-2 for prescription safety glasses or Z87-2+ for impact-rated safety glasses.
What do the markings on safety glasses mean?
Product markings are visible on safety frames and identify protection levels in the following areas: Prescription Lenses: Impact: Z-87 for basic impact, Z-87+ or Z98-2+ for high impact. D = Droplet and splash: D3 for splash and D4 for dust, D5 for fine dust. R = Infrared Light: R and scale number for infrared light.
What are the markings on my glasses lens?
These are the marks left on the surface of the lenses during the processing. It is a standard industrial practice to engrave or etch these markings to align exactly where the point in the lens is that starts changing from your distance Rx to your reading Rx.
What Mark is on industrial safety glasses?
The requirements of safety glasses fall under the Z87. 1 section (Occupational and Educational Personal Eye and Face Protection Devices) of the ANSI standards, thus the Z87 or Z87+ markings.
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