Photosensitive_glass
Photosensitive glass
Clear glass with microscopic metal particles sensitive to UV light
Photosensitive glass, also known as photostructurable glass (PSG) or photomachinable glass, is a glass in the lithium-silicate family of glasses onto which images can be etched using short wave radiations such as ultraviolet light.[1] Photosensitive glass was first discovered by S. Donald Stookey in 1937.[2][3][4]