Talk:Prussian blue
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[edit] Unqualified use of color coordinates
As any formally trained color scientist would confirm, it is inappropriate to use unqualified color coordinates to specify a color appearance. In the Prussian Blue article, as I would guess all the other color-related articles, there is a box on the upper-right of the page that pretends to state the color coordinates of the color in RGB, CMYK, HSV and Hex values. This is wholly incorrect. RGB values in themselves cannot depict color appearance. In order to do so, the RGB triplet has to be connected to physical reality through, at the minimum, the definition of the RGB color space used, the white point of the illuminant, and in certain cases, the gamma function. The ICC specifications can help one understand what these requirements are. If Prussian Blue has such and such color coordinates, they have to be qualified as, for example, in AdobeRGB color space. Better still, linear XYZ color coordinates should be used. Furthermore the conversion of RGB to CMYK is wholly dependent on the particular transfer functions used for a specific set of inks and paper combination - the idea of posting the CMYK color coordinates for a physical color appearance is naïve at best and mostly preposterous.
As such the article runs contrary to the most basic precepts of color science, and is wholly misleading to uninformed readers. Trying to digitally reproduce the appearance of Prussian Blue using the information contained herein will not work at all.
- Then please conduct a series of independent tests with all the information needed, publish it, cite it here, and change the Color Composition section. In the meantime, it will do as an approximation. -Toptomcat 22:40, 24 November 2006 (UTC)
[edit] Prussian Blue in concentration camps
The only place I ran across Prussian Blue outside of art history or a chemistry class was in a discussion of proving certain buildings were used as gas chambers in concentration camps - as I recall, the claim was that Prussian Blue formed on the rusted iron drain pipes of the shower rooms that had been repeatedly exposed to the cyanide.
Is this a subject we want to include in this article, or do we not want to touch that? TaigaBridge 21:56, 16 May 2007 (UTC)
- It's certainly interesting. Wikipedia's not really about avoiding controversial subjects; all we care about is one thing. Can you find a source for it? -Toptomcat 04:45, 6 July 2007 (UTC)
- Try http://www.holocaust-history.org/auschwitz/chemistry/ ImmunolPhD 12:11, 20 July 2007 (UTC)
[edit] Staining
Prussian blue is also known as a histology stain, to test for iron. In fact, this page is linked from the histology page, section "staining" http://en.wikipedia.org/wiki/Histology#Staining
Info on the stain can be found at: http://cancerweb.ncl.ac.uk/cgi-bin/omd?Perls'+Prussian+blue+stain
Perhaps a new section titled "Staining", or a new link option for "Prussian Blue Iron Staining"?
68.163.33.106 03:47, 1 September 2007 (UTC)Mko
[edit] Why are there two sections for the same thing?
There is an "other properties" section and "culture" section. Why? First, things like its being used for treatment of ingestion of cesium should be in the medical properties, and medical properties should NOT be considered culture. Second, cesium plays an insignificant role in pop culture. In my opinion, the "culture" heading should be eliminated and the text within that section should be moved to the appropriate places in the article, or separated into "uses" and "properties". —Preceding unsigned comment added by Rocketman768 (talk • contribs) 02:37, 17 October 2007 (UTC)
- Agreed, the culture section contains trivial items and has been renamed and trimmed appropriately. Ciotog 14:20, 4 November 2007 (UTC)
[edit] Prussian Blue On Prussian Uniforms?
The uniforms of the Prussian army.... wern't they Prussian Blue? —Preceding unsigned comment added by 86.151.178.205 (talk) 18:56, 13 March 2008 (UTC)
[edit] Holocaust?
Where on Earth is the stuff about Prussian Blue and the Holocaust as the poster above mentioned? —Preceding unsigned comment added by 86.128.148.9 (talk) 21:29, 27 May 2008 (UTC)
[edit] Whitespace?
I'm seeing a big chunk of whitespace next to the chemistry infobox, and the text of the article begins only next to the color infobox. I had a look at the page source but couldn't figure out what was causing that. Would someone who understands formatting better than I do take a look at that? (I'm on IE 6.0, WinXP). Chuck (talk) 21:01, 5 June 2008 (UTC)
- Looks perfectly okay on WinXP/Firefox, but it broke on WinXP/IE 7. Moving it down appears to have done the trick.--Rifleman 82 (talk) 21:17, 5 June 2008 (UTC)
