Replies to post #205703 on Liquidmetal Technologies Inc (LQMT)

[The Paraclete]

Steel, aluminum, and liquidmetal would never appear completely transparent to x-rays.

Air in the lungs is totally transparent to x-rays, meaning that air doesn't block any of the x-rays, so the x-ray film (or sensor) is fully exposed and the air in the lungs appears black. Calcium (a metal) blocks some of the x-rays, so bones, which are rich in calcium, block some of the x-rays, and that's why ribs and arm bones appear as shades of gray on an x-ray. A metallic prosthesis, such as titanium or stainless steel blocks 100% of the x-rays and appears white on x-ray pictures.

All solid metals block x-rays to a greater or lesser extent.