Assertion: glass's structure | /r/HasProperty | achieved by etching
Facets:
Source sentences:
text: Single-layer anti-reflective coatings aim to achieve the refractive index of 1.25 (halfway between air and glass), and can be made either by single-layer micro-porous structures achieved by etching, hybrid materials and other processes suitable for producing large-area coatings for art framing purposes.