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Old July 4, 2006, 04:21 PM   #26
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+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.
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Old July 4, 2006, 10:28 PM   #27
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"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";aulast=Bakshi

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.
Do you know about the TEXAS State Rifle Association?
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Old July 23, 2006, 09:39 PM   #28
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the infamous "Miami FBI" shoot out of 1989.
It was 1986.
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