Sorry, 1860's not 1760's! Michael Deibert OAS AAS LLS Sent from my iPhone
On Feb 1, 2011, at 18:04, Marie Stewart <maric...@gmail.com> wrote: > Hi folks. > I must, respectfully, disagree with Ann on a point about the color Prussian > Blue Prussian Blue is defined as absorbing wavelengths about around 680 nm, > causing it to appear in visible light as approximately 700 THz. Which is a > lovely strong blue leaning towards the violet end of the spectrum, not to > the green/yellow end. > (Methods of Chemical Analysis, 1998) > > I will agree with her that I misspoke when I said it was and aniline dye, > its a cyanometalate. I would have been more accurate to say that Prussian > blue was one of the first chemically synthesized dyes. Thanks for the > redirect on that one. > > (navel gazing: We know that the dye was in the painters sphere in the early > 1700s (18th century), but when did it move to the dyers sphere? Was it in > the mid-1700s, thanks to Macquer's experiments with reduction, thereby > giving an easily transportable salt? Or was it used popularly, or rarely > before that. I'm going to go have to go research this. Fascinating > topic. > > As a nifty side note, and a easy visual reference (although I got it from > Wikipedia, so take it with a big grain of NaCl) the midnight blue crayon > was once colored with and called Prussian blue. > > Mari > _______________________________________________ > h-costume mailing list > h-costume@mail.indra.com > http://mail.indra.com/mailman/listinfo/h-costume _______________________________________________ h-costume mailing list h-costume@mail.indra.com http://mail.indra.com/mailman/listinfo/h-costume
