Talk:Undark

Untitled

"Modern watch dials use tritium..."
    I'm fairly certain that all the glowing analog watch dials I've ever owned have had to be charged, so to speak, from time to time with periods of of light absorption- indicating that they solely used phosphorescent materials like copper-doped Zinc Sulfide, without the additional presence of tritium as a beta emitter.
    Perhaps I haven't purchased a watch recently enough, and tritium use has now become the norm? Otherwise, the sentence quoted above should be changed to also mention the use in some modern watch faces of phosphorescent materials like ZnS, without tritium.
-Jacob Cappell 166.184.216.39 06:40, 17 April 2007 (UTC)

Dubious

Article currently claims Undark was a mixture of radium and phosphorus. From the linked websites it appears more likely to have been a mixture of radium and zinc sulfide. However I have no reference for the composition of Undark specifically as opposed to radiolumnescent paints generally. Can someone find one? --Trovatore (talk) 22:27, 18 April 2008 (UTC)

Undark magazine

I am thinking that the reference to the online magazine is almost irrelevant to the original article? that being the radioluminescent material named Undark I'm thinking of removing this almost free advertisement from the article-comments?

Read-write-services (talk) 02:45, 23 March 2017 (UTC)

Removed the extraneous material NOT related to Undark Read-write-services (talk) 03:16, 23 March 2017 (UTC)

Wiki Education assignment: Spring 2025 OSH Courses Projects

This article was the subject of a Wiki Education Foundation-supported course assignment, between 6 January 2025 and 3 May 2025. Further details are available on the course page. Student editor(s): RockyHMorris (article contribs).

— Assignment last updated by UCIHGrad18 (talk) 17:18, 19 February 2025 (UTC)