Blackthumb Posted January 20, 2012 Posted January 20, 2012 found this formula in my notes from the 60's...anyone recognize it? Potassium Perchlorate 14Aluminum Dust 6Clacium Carbonate 1Dextrin 1Shellac 2Paris Green 10Mercurous Chloride 2
allrocketspsl Posted January 20, 2012 Posted January 20, 2012 i gave up on paris green for good blues trying now copper powder
Peret Posted January 21, 2012 Posted January 21, 2012 That's not a workable formula, someone must be pulling your leg. It doesn't have nearly enough oxidizer, which should in any case be potassium chlorate with Paris Green. And if you think Paris Green is hard to come by, you won't believe how hard it is to find Calomel.
Mumbles Posted January 21, 2012 Posted January 21, 2012 My first guesses were Kentish or Weingart. Neither have said formula. Honestly anyone who adds calcium to a blue formula has a few screws loose as far as I'm concerned anyway.
WSM Posted January 22, 2012 Posted January 22, 2012 (edited) My first guesses were Kentish or Weingart. Neither have said formula. Honestly anyone who adds calcium to a blue formula has a few screws loose as far as I'm concerned anyway. The only thought I had about the calcium component was he was leaning away from just blue to slightly purple which gives the illusion of a deeper blue. Calcium isn't a true orange (if there really is such a thing), but a red-orange and the effect can be like a little red added to the blue, which predominates. Just my thinking, anyway... WSM Oh, and I'd never use potassium perchlorate with Paris green either (I've only ever used potassium chlorate with it). Edited January 22, 2012 by WSM
ExplosiveCoek Posted January 22, 2012 Posted January 22, 2012 I think you're right WSM, Majdali Purple looks more like a deep blue to for instance. Probably because of the small part SrNO3 in it.
WSM Posted January 22, 2012 Posted January 22, 2012 I think you're right WSM, Majdali Purple looks more like a deep blue to for instance. Probably because of the small part SrNO3 in it. True, and you should see that one in a cavity comet with silver or gold glitter,... gorgeous! WSM
Potassiumchlorate Posted January 22, 2012 Posted January 22, 2012 (edited) I actually doubt that Paris Green is that totally superior in colour. What makes it superior is: 1. It doesn't need another chlorine donor than the potassium chlorate.2. Paris Green stars are easily ignited. Edited January 22, 2012 by Potassiumchlorate
WSM Posted January 22, 2012 Posted January 22, 2012 (edited) I actually doubt that Paris Green is that totally superior in colour. What makes it superior is:1. It doesn't need another chlorine donor than the potassium chlorate.2. Paris Green stars are easily ignited. Regardless, I'd recommend priming them. As to it's being "superior", that's totally debatable; although Dr. Shimizu suggested a standard for blue flame using Paris green and ammonium perchlorate (and who are we to argue with the late but venerable and astute Doctor?!)! WSM Edited January 22, 2012 by WSM
50AE Posted January 24, 2012 Posted January 24, 2012 What about the unique paris green flame envelope that many people talk about?
Potassiumchlorate Posted January 24, 2012 Posted January 24, 2012 What about the unique paris green flame envelope that many people talk about? I didn't notice it with potassium chlorate but with ammonium perchlorate. I used the "standard" flame suggested by Dr. Shimizu but used hexamine instead of shellac. The flame was really enormous.
allrocketspsl Posted January 24, 2012 Posted January 24, 2012 I use copper oxide also..... no 325 mesh copper powder!Not oxide
allrocketspsl Posted January 24, 2012 Posted January 24, 2012 I actually doubt that Paris Green is that totally superior in colour. What makes it superior is: 1. It doesn't need another chlorine donor than the potassium chlorate.2. Paris Green stars are easily ignited. its just an old paint coloring agent they stopped using due toxicity i have done five or six blues with it and wasnt impressed and I here from his mouth a rocket elite expert say hum not using paris green again so if you go to skylighter they have alot of blues using copper powder which I have not had time to make yet but will when i do
allrocketspsl Posted January 24, 2012 Posted January 24, 2012 (edited) http://www.amateurpyro.com/forums/topic/6916-3-blue-star-shell/ heres a great blue color shell by a member,one of the best blues I have seen Edited January 24, 2012 by allrocketspsl
Potassiumchlorate Posted January 24, 2012 Posted January 24, 2012 That's a nice one, yes. It actually all depends on the kind of blue you like. If you like a deep and pure blue, AP blues with copper oxide or copper benzoate are probably as good as anything with Paris Green. If you prefer them brighter and/or with a little green, I'd advice Bleser Aqua or 50AE's very simple but nice blue.
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