YT2095 Posted December 2, 2006 Share Posted December 2, 2006 This morning I`ve just perfected Red I`ve been experimenting with simple Acid/Metal combinations seeking the most Vivid of all the basic color primaries. Red: Cobalt metal + Nitric acid Green: Nickel metal + Nitric acid Blue: Copper metal + Nitric acid (interestingly these are all side by side in the periodic table too) the depth of colors to these salts is amazing! but the only problem is these are all for Addative color synthesis, for Subtractive color synthesis I need a Yellow. thus far I`ve come up with nothing at all convincing. any ideas? Link to comment Share on other sites More sharing options...
woelen Posted December 2, 2006 Share Posted December 2, 2006 The best yellow is from cerium metal in the +4 oxidation state. Very pure and intense almost monochromatic yellow. Another good yellow is made by vanadium in the +5 oxidation state at suitably adjusted pH. But this one is very sensitive on pH. Have a look on my website, I did a lot of experimenting with this. Yet another good one may be the tetrachloroferrate (III) complex, made by dissolving any iron (III) salt and adding excess chloride and some acid. Dissolving such a salt in HCl of medium concentration also is OK. http://woelen.scheikunde.net/science/chem/solutions/ce.html http://woelen.scheikunde.net/science/chem/solutions/v.html http://woelen.scheikunde.net/science/chem/solutions/fe.html Link to comment Share on other sites More sharing options...
YT2095 Posted December 2, 2006 Author Share Posted December 2, 2006 Hmmm... just had a quick look through them and the Cerium looks to the closest that I`m after, but I somehow dount it would remain like that as a solid crystal. I do have a chunk of Monazite (Cerium/Thorium) coming my way anyday now, so may try experiments with this as I process it for my Element collection. my idea is to keep things as simple as possible though, 1 metal, one acid. Lead Chromate is nice for yellow but it`s far too complex (and opaque) for what I`m after. the Cerium Does look promising though Link to comment Share on other sites More sharing options...
jdurg Posted December 2, 2006 Share Posted December 2, 2006 PbI is a beautiful canary yellow color as a solid precipitate, but alas it is not soluble in water so you cannot have a solution of it. (Besides, I believe it would be colorless in solution). Link to comment Share on other sites More sharing options...
Gilded Posted December 3, 2006 Share Posted December 3, 2006 Potassium chromate is surprisingly yellow too... :| Link to comment Share on other sites More sharing options...
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