benrenyi4 Posted July 8, 2015 Share Posted July 8, 2015 Who knows the strontium carbonate red strobe formula？The strontium nitrate strobe stars absorb moisture quickly because the nitrate is hygroscopic. Link to comment Share on other sites More sharing options...
mohammacl Posted July 8, 2015 Share Posted July 8, 2015 http://www.pyrodata.com/compositions/Lancaster-chlorate-Red Link to comment Share on other sites More sharing options...
gregh Posted July 8, 2015 Share Posted July 8, 2015 http://www.utahpyro.org/compositions/ChemicalListForColoredStars.pdf Link to comment Share on other sites More sharing options...
benrenyi4 Posted July 10, 2015 Author Share Posted July 10, 2015 Thank you all Link to comment Share on other sites More sharing options...
wizard7611 Posted July 11, 2015 Share Posted July 11, 2015 Now I'm just curious. Lets say I have a rolled batch of red strobe stars in front of me. How long would it take for them not to strobe anymore? Link to comment Share on other sites More sharing options...
Rocketier Posted July 11, 2015 Share Posted July 11, 2015 (edited) I tested both and worked fine.bind and rolled them with NC aceton and at last layer sealed of with NC no moist problems. Chinese strobe Star Red blinkingStrontium Nitrate 58Potassium Nitrate 5PVC 15 (HCB or Saran)Mg/Al alloy powder 18Sulfur 4Nitrocellulose "paste" additional 25% to damp Chinese strobe Star Green blinkingBarium Nitrate 58Potassium Nitrate 5Mg/Al alloy powder 17PVC 15Sulfur 4Nitrocellulose "paste" additional 25% to damp Edited July 11, 2015 by Rocketier Link to comment Share on other sites More sharing options...
ddewees Posted July 11, 2015 Share Posted July 11, 2015 The colored nitrate strobes don't work well for me... All the great ones seem to use AP. Link to comment Share on other sites More sharing options...
Niladmirari Posted March 2, 2016 Share Posted March 2, 2016 Hi all. Who knows composition? Link to comment Share on other sites More sharing options...
Mumbles Posted March 2, 2016 Share Posted March 2, 2016 http://www.skylighter.com/fireworks/how-to-make/fireworks-strobe-pots.asp Funny, I would have suspected them to be nitrate based. They didn't seem regular enough for AP. Link to comment Share on other sites More sharing options...
OldMarine Posted March 2, 2016 Share Posted March 2, 2016 I've been tinkering with those strobe pots and can't seem to get them regulated. They vary between 2 and 12hz no matter how I adjust the MgAl. Still trying though. Link to comment Share on other sites More sharing options...
lloyd Posted March 2, 2016 Share Posted March 2, 2016 (edited) Patrick,Strobes are sensitive to: Particle sizes (of all the components), compaction, NC-content, moisture content, and finally, the area initially ignited. That last might seem odd, because - well - ALL the surface will eventually get lit -- right? Except: If you ignite a small dot in the center of the column, it will 'bore in', forming a shallow core, much like a rocket. That changes the surface area. So, it's simplest to ignite the entire top of the column at once, in order to get it burning "candle fashion" from the get-go. Prime the whole surface uniformly thick, and grain-powder prime THAT prime, to make sure it lights uniformly. LLoyd Edited March 2, 2016 by lloyd Link to comment Share on other sites More sharing options...
OldMarine Posted March 3, 2016 Share Posted March 3, 2016 Lloyd, I made another small batch using the tips you all gave me in the other thread. I step primed them after scarifying the still damp comp. I used a finer mesh of MgAl as well. I'll let them dry for a week just to be sure before testing.I also added some fine MgAl to the prime. Link to comment Share on other sites More sharing options...
Mumbles Posted March 3, 2016 Share Posted March 3, 2016 I wonder if using a tight cut of MgAl would help. As a back of the envelope calculation, for -100+200 mesh MgAl, the actual amount of metal per granule varies by approximately an order of magnitude. That seems like a lot. Link to comment Share on other sites More sharing options...
OldMarine Posted March 3, 2016 Share Posted March 3, 2016 (edited) I have some of August's MgAl that I got from Chris but only in the finer meshes. I don't know if the larger tightly classified ones are still available but I'm a'looking. Edit: nope only the milled. Edited March 3, 2016 by OldMarine Link to comment Share on other sites More sharing options...
Recommended Posts