Last edited: 22 November, 2013 - 21:33
Time is a river without banks. Marc Chagall
Last edited: 23 June, 2014 - 15:36
8541 Wrote:Jimmy, superb find and in great shape too.May I ask what are the full texts on the cal.65 dial?
clepsydra Wrote:Congrats Jimmy. I did not know there was a CoE with cal 65. Another must have. I hate when that happens. :-)
Last edited: 24 June, 2014 - 14:29
Not all the radioactive material remains where the paint is visible. Over time, this paint will become very dusty and it is important not to breath any of this dust. The watch crystal should not be removed without a good reason, nor should the watch case be opened up. The dust is due not only to the normal aging of the paint, but also because when radium breaks down, the force of emitting the alpha particle during the radioactive decay causes the daughter atom to recoil. This recoil is strong enough to break the chemical bonds that holds the atoms in place. The resulting daughter atoms will move a little ways away and then settle. These daughter elements, such as radon-222, polonium-218, lead-214, and such, are all radioactive and just as much a problem as the radium.
It wasn't just radium-226 that was used, but a variety of different radioactive elements. Most of these other elements will decay faster than radium-226, so they may be less dangerous now. Also, depending on how the paint was mixed up, some dials were very hot, while others were not
Is the power that great that "burning" wounds develop? Or is it a simple deposit, harmless being the end product of sublimated ZnS on the surface?
Last edited: 24 November, 2013 - 23:01