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July 4, 2006, 04:21 PM | #26 |
Senior Member
Join Date: April 11, 2006
Location: Northeast Ohio
Posts: 3,403
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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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July 4, 2006, 10:28 PM | #27 |
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Join Date: February 12, 2001
Location: DFW Area
Posts: 24,990
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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). " http://www.coe.uga.edu/mse/science/o...ys/x-rays.html "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. " http://www.aip.org/pt/vol-58/iss-6/p22.html "A typical X-ray will penetrate through thin layers of aluminum, and eventually be absorbed by the material." http://www.madsci.org/posts/archives...3690.Ph.r.html 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. http://www.sciencenews.org/pages/pdf...9/15319-15.pdf "Calibration procedure of aluminum wedge by optical density gradient of its X-ray image " http://www.ncbi.nlm.nih.gov/entrez/q...&dopt=Abstract "Aluminum alloy wedges are used to standardize x-rays" http://lsda.jsc.nasa.gov/scripts/har...ardware_id=777 "Aluminum FB (foreign bodies) can often be visualized on radiographs" http://www.ncbi.nlm.nih.gov/entrez/q...&dopt=Abstract "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" http://www.jpgmonline.com/article.as...;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.
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July 23, 2006, 09:39 PM | #28 | |
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Join Date: December 11, 2000
Location: Phoenix, Arizona
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