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沒辦法 勞力士天生只有被PP壓在下面猛槌的命  |
槌樓雷. 
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cwlan
終極會員   |
發表於: 星期二 2009-01-20 02:57
槌樓雷.
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cwlan
終極會員 |
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cwlan
終極會員 |
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alexlt730512
資深會員   |
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cwlan
終極會員 |
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adam69sun
白金會員   |
發表於: 星期二 2009-01-20 07:03
malic大大、 不太像是加長秒針的曝光時間呢?? 
可以指導一下小弟這個初學者嗎?? _________________ My First Lover is ZENITH Open T 40mm But Now is 116710 and 1601 ~ |
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cwlan
終極會員 |
發表於: 星期二 2009-01-20 17:39
轉貼一些關於夜光材質的資料.
http://www.rolexforums.com/showthread.php?t=31836 http://www.oysterinfo.de/en/detailinfos/leuchtmasse/index.php http://ulyssenardin.watchprosite.com/show-nblog.post/ti-399346/ Rolex Watch Lume Here is a brief overview of the various Luminous Materials. Radium: Up until about 1960, Rolex used the radio-active material Radium to coat hands and indices of their dials. The Radium markers were extremely efficient where bright luminosity is concerned, but also much more radio-active than the successor, Tritium. Workers at the Rolex manufactory and other watch and clock shops, applied the Radium by hand; or rather by using a fine painting brush. To apply the Radium exactly to the places where it was supposed to be, workers would tend to lick the tip of the painting brush to get a sharper point, thus being better able to apply more accurately the Radium. This habit of licking the painting brush resulted in numerous cases of workers getting cancer, especially mouth cancer. But as stated, Radium was used up until 1960, where popular use finally ceased due to serious health risks. The dials having Radium as luminous markers would read "SWISS" at six o' clock. Tritium: Tritium was used from 1960 to 1998. Also being radio-active, but more mildly so (beta waves). The half-life is approx. 12.3 years. After that, Tritium (in most cases) will not glow anymore. There were two degrees of Tritium dials: a) the dials emitting radio-activity of less than 25 mC. Dials are marked "SWISS T < 25" b) the dial emitting radio-activity of less than 7,5 mC. Dials are marked "T SWISS T". To describe the intensity of the radio-activity of the Tritium markers, a thin sheet of Aluminium is able to block Tritium beta waves. Thus, the Oyster case and crystal were said to be sufficient guard to prevent any harmful radiation to the wearer of the watch. The radiation a person gets from the normal background radiation found in nature exceeds the radiation emitted from a "T < 25" dial. As a side note: Besides the "half-life degression" of the Tritium, hands and indices applied with Tritium have often been known to discolour to a more brownish tone by age. Some say that factors like UV rays and humidity play a role. Therefore, not ALL Tritium dials discolour. It depends on what environment the dial / watch was kept in. (Super)Luminova: A Japanese invention from the company Nemoto, the non radio-active substance, Luminova, was introduced in 1998 when Tritium was (at least widely) banned. Time spans for the use of Luminoa is: a) 1998 - 2000: Dials (again) marked "SWISS" at 6 o' clock b) 2000 - : Dials marked "SWISS MADE" at 6 o' clock. The terms "SuperLuminova" and "Luminova" describe the same paint compound. Technically, there is no difference between the two, but "SuperLuminova" is a term reserved by Nemoto's European partner, Tritec. SuperLuminova is not (yet!) known to discolour by age. But SuperLuminova is quite fragile and does not like humidity which can make it crumble. Some companies solve this issue by applying a thin coat of clear lacquer to the markers of the dial. |
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cwlan
終極會員 |
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sovereign
終極會員  |
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MC5653
白金會員  |
發表於: 星期四 2009-01-22 13:06
每一張的夜光照都很美,就是喜歡有夜光的錶
_________________ 美麗的東西其實不需要珍藏，而是要珍惜！ 金錢觀 : [可以等 , 但不要省] |
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