|July 4, 2006, 04:21 PM||#26|
Join Date: April 11, 2006
Location: Northeast Ohio
+tshadow6. I roll my own for the range or for fun on my friend's farm, .38 and .357, but when it comes to rounds for SD, I'll take factory-loaded Winchester Silvertips every day.
|July 4, 2006, 10:28 PM||#27|
Join Date: February 12, 2001
Location: DFW Area
"Exposure Level #1:
X-rays can easily penetrate paper and cloth but can not penetrate denser materials such as rubber, glass, wood, or metals (aluminum, steel, and lead). "
"To block stray radio waves emitted by the detector's circuitry, the FPD was encased in a thin aluminum skin, which is almost transparent to x rays but opaque to radio. "
"A typical X-ray will penetrate through thin layers of aluminum,
and eventually be absorbed by the material."
Quoting is hard since this is a pdf, but do a search on aluminum and find a very brief description on how aluminum is used to calibrate dental X-Rays by comparing it's known density on the images to other objects in the image.
"Calibration procedure of aluminum wedge by optical density gradient of its X-ray image "
"Aluminum alloy wedges are used to standardize x-rays"
"Aluminum FB (foreign bodies) can often be visualized on radiographs"
"A plain abdominal X-ray [Figure - 1] was advised that showed a linear radio-opaque shadow lying transversely in the pelvis. On persistent questioning, he gave a history of introduction of a 5.5 cm long aluminium rod"
I think that these are sufficient to show that even standard procedure X-Rays can render aluminum visible.
However, I will concede that there are also many links indicating that locating aluminum on X-Rays can be difficult in some cases. I think that would be a much more accurate way of stating your premise since it should be abundantly clear that saying it's invisible is overstating the problem.
Did you know that there is a TEXAS State Rifle Association?