3 ms·
> So it looks to be both more scratch-resistant and more shatter-resistant. Refractive index 1.79, Abbe number 58… Why are my eyeglasses not made of this?
by kps 9y ago
> So it looks to be both more scratch-resistant and more shatter-resistant.
Refractive index 1.79, Abbe number 58… Why are my eyeglasses not made of this?