How to get dust off film for scanning.
in [Digital Cameras]
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From: Mxsmanic on 8 Jun 2010 06:00 Mxsmanic writes: > The actual radioactivity of a polonium source after 20 years is 1/(2^53), or > about > > 0.00000000000001.1624731 % Rrr ... that's 0.000000000000011624731 %, without the extra decimal point.
From: scott nalter on 8 Jun 2010 07:05 On Tue, 08 Jun 2010 11:40:40 +0200, Mxsmanic <mxsmanic(a)gmail.com> wrote: > >It's best not to try to open the polonium source, though, and I recall that >you weren't supposed to just throw it into the trash to discard it (also true >of things like smoke detectors, which sometimes contain radioactive sources >like americium). Unlike polonium, americium stays radioactive for the life of >the product it's in (half-life over 400 years). Without going to look this up and wading through tomes of websites, I have to ask. Could one use the radioactive source from an old smoke-detector to make an effective anti-static brush? Or are the particles emitted (and rate of decay) by the americium unable to accomplish the task as effectively? I was thinking that the americium from this readily available and often free source might make a nice replacement for all those anti-static brushes that have lost their "oomph", without having to pay an arm and a leg for yearly polonium refills, for 400 years.
From: Bruce on 8 Jun 2010 08:01 On Tue, 08 Jun 2010 11:51:09 +0100, Bruce <docnews2011(a)gmail.com> wrote: >I still have my original Zerostat and I still use it occasionally for >film strips before scanning. Actually I *always* use it on the film >strips, I only scan film occasionally these days. ;-) > >It is also very useful when loading negatives into the enlarger. But >I don't suppose very many people subscribing here do that now ... > >The price for the new one seems high. New Zerostat pistols sell in >the UK for no more than GBP 45.00 which is less than US $70. Apologies, for a proper comparison I should have deducted UK Value Added Tax (sales tax) which is included in the price. Without taxes, the Zerostat costs no more than GBP 38.50 which is less than US $60. The $100 price quoted therefore seems excessively high.
From: Peter on 8 Jun 2010 09:10 "Savageduck" <savageduck1@{REMOVESPAM}me.com> wrote in message news:2010060720442816807-savageduck1(a)REMOVESPAMmecom... > > Damn! > You just reminded me. I have two of those brushes packed away with about > 1500 LPs, turntable, speakers, a Marantz amp, a Denon amp, and plenty of > dust. > I haven't gone through any of that stuff in about 20 years. > My Marantz amp=pre amp just sits on a shelf, connected to nothing. At one time I thought I would use it for TV surround sound, but current systems are so good and so cheap, that it is not good for anything but an honorable retirement. -- Peter
From: Peter on 8 Jun 2010 09:13
"Mxsmanic" <mxsmanic(a)gmail.com> wrote in message news:es4s06dqu44lmj3o8ku4n3ro31fakem12l(a)4ax.com... > > The actual radioactivity of a polonium source after 20 years is 1/(2^53), > or > about > > 0.00000000000001.1624731 % > > of the original level. It decades into lead, which is not radioactive. So > after 20 years, a polonium source is no longer hazardous (and it is > actually > lead rather than polonium). That would be two decades -- Peter |