Aura developed the AGW-250 lens to answer requests for improved infrared radiation protection while also reducing the light level perceived by the eye.
It comprises a base glass lens of our exclusive True Didymium™ with a thin layer of either shade 3, 4, 5, 6, or 8 Green Welding (full coverage) laminated to the base lens. This is very desirable when working with high-pressure torches and glass, requiring extremely elevated temperatures.
Suggested uses are where there is a need for attenuation of bright illumination, such as that generated when working Pyrex®, quartz, Vicor®, platinum jewelry work, and any operation where the artist spends prolonged periods of time gazing into a high-temperature furnace or fire pit.
Quartz workers must use a minimum of Shade 8!
The AGW-250 filter is available in non-prescription (Plano power) and single vision prescription forms only.
Thickness Advisory: This filter is thicker than normal lenses. In non-prescription form, it is approximately 5 mm thick.
Shade 8 is Custom Made and Not Returnable except for manufacturing defects.
Protected under the United States Patent Number 6,612,697.
Specifications (Shade 3):
Maximum Visible Light Transmission: 12.4%
Average (400 to 750 nm) Visible Light Transmission: 5.6%
Average (751 to 3000 nm) IR Transmission: 4.0%
ANSI Welding Shade Equivalent: 3.0 approximate
NOTE: Shade 3 filters are *NOT* designed for advanced techniques, such as fuming or intensive flare colors without additional filtration.
Specifications (Shade 4):
Maximum Visible Light Transmission: 11.2%
Average (400 to 750 nm) Visible Light Transmission: 4.9%
Average (751 to 3000 nm) IR Transmission: 3.4%
ANSI Welding Shade Equivalent: 4 approximate
Specifications (Shade 5):
Maximum Visible Light Transmission: 5.7%
Average (400 to 750 nm) Visible Light Transmission: 2.1%
Average (751 to 3000 nm) IR Transmission: 1.5%
ANSI Welding Shade Equivalent: 5 approximate
