Pirotecnia Posted December 16, 2012 Posted December 16, 2012 Hi, Trying some chemicals, i made this composition that makes an yellow color. Ingredients: Potassium Nitrate - 55Sulphur - 33Charcoal - 3Sodium Chloride - 3Sodium Bicarbonate - 3Copper Carbonate - 3Dextrin - 5 Mill all the components for about 1 hour. Then, you can roll, cut or pump your stars! Video: Thanks!
Zumber Posted December 17, 2012 Posted December 17, 2012 here is my ancient gold star-sodium nitrate...4 partsbarium nitrate....0.540 mesh magnesium(coated).....1fine magnesium.....0.5sulfer...1.5airfloat charcoal....0.5comment-star can be made only early in the morning and dry out directly in sun immediately as sodium nitrate is too hygroscopic and absorbs moisture so quickly when dried in shadowand your star will never dry.keep star in sealed container once dried it will take about 4 days to dry out completely.bp prime can easily ignite the stars.star burns nice gold with a little bit strobing effect
zombiesDONTwipe Posted March 14, 2016 Posted March 14, 2016 I made this composition and it burned a more orangey color. I'm not sure if this was because of the paper I lit it with or if the yellow is just a camera thing from the video. I will be updating you when I fire these stars from a mine.
PhoenixRising Posted April 27, 2016 Posted April 27, 2016 That seems like a very simple formula. I'm interested to play around carbonates pretty soon, mainly for winokur39. In my experience both sodium chloride and carbonate burn very orange, weird how copper changes that to yellow. I will personally try to stay away from sodium comps due to hygroscopicity, living in the South and all. I'll probably be going the cryolite route for my yellows in the future. I've only limited experience, looking to learn more here, been lurking for a while.
lloyd Posted April 27, 2016 Posted April 27, 2016 Phonenix,You might consider making an "optical yellow" by combining barium green and strontium red. To my eye, it's much more pleasing than the "dirty laundry yellow" of anything sodium-based. 'Less issues with hygroscopicity, too! Lloyd 1
Mumbles Posted April 27, 2016 Posted April 27, 2016 A pure sodium yellow is sort of on the yellow-amber-orange threshold. A color I personally heavily dislike. However, cryolite seems to give a more pure yellow in my experience compared to most other sodium salts. I do second Lloyd's suggestion of an optical yellow. They're very tuneable to give exactly the hue you desire. With careful manipulation, you can make the whole spectrum from green to red with a simple formula. The only color I've had trouble with is chartreuse or lime green. Those benefit by a touch of a sodium to make them pop in my experience. It really shouldn't be too surprising that copper and sodium make a purer yellow. Orange-yellow + green will make yellow. You have to remember that copper can burn green in the absence of chlorine. It can also burn red with an excess of oxygen, but that doesn't fit with the results. 1
PhoenixRising Posted April 27, 2016 Posted April 27, 2016 (edited) Thanks for both replies guys, that's some good info. My goal this 4th is to have some yellow comets with titanium trail. I have the titanium coming with some "breaking glass" aluminum as well. Will work on the color system over the next month. Don't think I'll be doing Veline Yellow is a color I seldom see down here and it really stands out IMO. Sorry didn't mean to hijack the thread. Edited April 27, 2016 by PhoenixRising
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