Talk:Han purple and Han blue

Merging Chinese Blue into Han Purple
Obviously, there is no question that Chinese Blue should be merged into Han Purple since both articles are about the same pigment. I'm going to do it right now. Keraunos 04:53, 28 October 2007 (UTC)

If I could add a remark, I'm writing a ph D about these both pigments. It is totally wrong to say that chinese Blue = han purple...It is 2 differents compounds for various reasons: a) different composition: chinese blue is also known as effenbergerite with the well defined gillespite structure. b) the colour... chinese(or Han) purple absorbs in both blue and red... so that it is violet (called purple because it is not a violet...)

So please, check your own source before telling wrong things. —Preceding unsigned comment added by 130.60.152.120 (talk) 17:17, 21 January 2008 (UTC)


 * It is not true, that Han purple is blue with Cu2O particles. Recently I started to prepare Han Purple (heating of a stoichiometric mixture of SiO2, Cu and CaCO3 with a little borax at 900 °C). It is not finished yet but the product contains blue and purple crystals now, and I hope the blue ones will change to purple ones... --FK1954 (talk) 09:23, 25 March 2010 (UTC)
 * I can point you to my phD thesis available on researchgate: I did it without borax..it worked. the trick is to repeat the process of baking seversal times with wet milling steps. to increase the distribution of each. 213.193.109.182 (talk) 14:31, 18 August 2022 (UTC)

Split
I see in the above post that it was merged quite some time ago, but to me that does not really make sense. I would suggest to split these two 'compounds' and use the data separately and appropriately. --Dirk Beetstra T C 13:47, 9 March 2010 (UTC)

Color of Han purple
Why does it talk about the red copper(I) oxide, while in the formula it gives the CuO, which is copper(II) oxide? --Chemicalinterest (talk) 15:44, 18 May 2010 (UTC)

Add Ocean trade to Silk Road
The singular reliance on outdated view of only the Silk Road being the path of contact/trade between East and West needs to be updated to include the heavy ocean trade in both Pacific and Atlantic (see Barry Fell where in American BC he uses experts to decode ancient writings across the America's to prove such extensive trade 2,000 BC to 800 AD). And to the theories of China invention e.g. of blue/purples needs to be added this better understanding of that widespread non silk road contact via trans ocean trading. Recall also the ceramic blue cooking balls along the US SE coasts, of Egyptian origin using ? Egyptian blue glazes (? dated to ? 2,000-1,500 BC) traded to US West coast and carried across Pacific to China. And add'l comparison is the bronze Greek astrolabe of 500 BC (with approx 50 moveable geers and ab foot tall, a GPS from ancient times-only later "copied" in China with 20 foot tall wooden version approx 1,400 AD) - Addin Scio 2 Drivil 69.121.221.97 (talk) 10:11, 6 May 2011 (UTC)

the name of the hue
Surely Han purple is a violet hue? - often refered to as purple... 149.142.201.253 (talk) 18:25, 18 February 2015 (UTC)