Finally, a pair of glasses for safely observing a solar eclipse! These are green athermal welding glass lenses in a very dark shade 14 that are made specifically for use in observing solar eclipses. This is the same shade as the 2" x 4.25" glass rectangles used by schoolteachers to protect students and children so that they can safely look directly at a solar eclipse. In fact, these lenses are made from the same exact, top-quality German glass often found in classrooms and scientific labs for solar eclipse observation. Please note: these are FAR too dark to be used as regular sunglasses. THESE ARE NOT SUNGLASSES! The green athermal lenses block over 99% of UV light and 97% of infrared radiation, but they are specifically for looking at the sun during a solar eclipse. Their only other application is welding (yes, these are green athermal shade 14 welding lenses). Used for Safely Observing a Solar Eclipse Green Athermal Shade 14 Glass Welding Lenses Very, Very Dark Lenses Intended Solely for Solar Eclipse Observation or Welding Not for Use as Sunglasses! Far Too Dark! Blocks Over 99% of UV Light and 97% of IR Radiation
ترست بايلوت
منذ أسبوعين
منذ شهر
