Vintage Gruen: 1940's

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Re: Gruen Mens ID [message #16849 is a reply to message #16847]

Fri, 01 July 2022 20:39

JackW
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Registered: May 2013
Location: Denver

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sleepyastronaut wrote on Fri, 01 July 2022 11:28

I know this test to work for tritium-based lume, but have read it isn't applicable to radium. It does work to detect my cotton undershirts.

On your cotton t-shirt, it is detecting the optical brightener that was used in the detergent. UV works on my WWI watches. Zinc Sulfide, which is the phosphor in the radium luminescent material is itself UV reactive.

All I know is based on hard work & writing by others. I can only aspire to augment this body of knowledge. If I am wrong it is because of my own failings. -me

"If I have seen farther it is by standing on the shoulders of giants." - Newton

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[Message index]

		Strap 393 By: testguy on Mon, 09 October 2017 21:26
		Re: Gruen Mens ID By: Barney Green on Tue, 10 October 2017 07:49
		Re: Gruen Mens ID By: testguy on Tue, 10 October 2017 10:57
		Re: Gruen Mens ID By: Benjamin_Rush on Thu, 30 June 2022 23:21
		Re: Gruen Mens ID By: JackW on Fri, 01 July 2022 02:39
		Re: Gruen Mens ID By: Benjamin_Rush on Fri, 01 July 2022 05:26
		Re: Gruen Mens ID By: Barney Green on Fri, 01 July 2022 08:54
		Re: Gruen Mens ID By: JackW on Fri, 01 July 2022 16:26
		Re: Gruen Mens ID By: Benjamin_Rush on Fri, 01 July 2022 17:28
		Re: Gruen Mens ID By: JackW on Fri, 01 July 2022 20:39
		Re: Gruen Mens ID By: JackW on Sat, 05 October 2024 03:28
		Re: Gruen Mens ID By: afire on Mon, 14 October 2024 22:02
		Re: Gruen Mens ID By: JackW on Tue, 15 October 2024 17:27

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