Talk:Dichroic glass

The image appears to be from the site www.cobwebglass.com —The preceding unsigned comment was added by Mattush (talk • contribs) 03:44, 19 February 2006.

I'm sorry, which image are you referring to? If there's a copyright problem, it can be taken care of. Melchoir 11:48, 19 February 2006 (UTC)

NPOV Section

The "What is Dichroic Glass?" appears to be biased it reads like an advritisment. --69.59.67.68 22:37, 29 June 2006 (UTC)

I respectfully disagree. This is a simple, factual article. It contains no POV at all that I can see. I'm going to remove the tag and ask that you don't replace it. If you think the article needs further editing, please feel free to contribute. Thanks. --Doc Tropics 22:41, 29 June 2006 (UTC)

OK, someone had used the word "fabulous" to describe the appearance; I suppose that was a bit unencyclopedic so I rewrote a bit when I removed the tag. Hopefully it's better now. --Doc Tropics 03:47, 30 June 2006 (UTC)

Modified

• removed reference (advertisement): Dichroic Glass Resources, Artists' Forum at dichroicglass.co.uk

"Dichroic glass" is not scientifically correct when speaking of ancient roman glass even if accepted in general in literature for the while being

the article says the glass from the Lycurgus cup is "dichroic", but the glass has been analyzed many times (just check the other refs on the Lycurgus cup wiki article) and its color changing properties are due to colloidal gold and colloidal silver. True dichroic glass is made with thin films of metals or metal oxide films embedded in molten glass. outdated info such as what the British Museum presents on its website is typical of old museum descriptions that haven't been yet revised and corrected, attributing artefacts to the wrong artists and periods and wrong physical or chemical compositions.

Oh really? Who exactly "revised" the definition of "dichroic" and when? Any sources? I can't imagine why you would think that the invention of a different new type, with rather different properties, would somehow displace the old meaning, making it "outdated". This is a strange idea. Johnbod (talk) 19:48, 1 January 2014 (UTC)

There is no "old" meaning at all, there is one true definition of dichroism and a term used to describe an effect that doesn't yet have it's own term, thus a loan term is used. Read dichroism and pleochroism . Those who revised the meaning of dichroism are a handful of selfrighteous museum experts and perhaps some people working at Corning inc who decided more than 50 years ago to adopt the term "dichroic" for roman glass that exhibited a color change due to scattering, no more no less, at least until a consensus is reached one day that will see a word more fit to the the particular effect observed with this gold silver ruby glass that changes color. I changed the title in the talk page in order to not misguide readers.

Your own section header, let us remember! Johnbod (talk) 19:45, 3 January 2014 (UTC)

No less than MIT's Don Sadoway refers to the cup of Lycurgus as dichroic--in his materials science class, and it's probably in the recorded version you can find online as well. JKeck (talk) 13:56, 25 December 2014 (UTC)

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More science

Can someone add more science, physics, and math to this please? 2600:1700:4CA1:3C80:A51D:8975:F249:14B (talk) 03:12, 4 November 2018 (UTC)