Juanma9410 Posted September 1, 2018 Posted September 1, 2018 Hi, a few days ago I saw this video and the truth those stars make me happy.Could someone tell me his composition?thank you very much
PhoenixRising Posted September 2, 2018 Posted September 2, 2018 I have a feeling the Veline Colors would yeild you sometihng similar to those colors. More Mg/Al could be added to increase the brightness at the expense of washing the colors out. https://www.skylighter.com/blogs/how-to-make-fireworks/veline-fireworks-stars-color-system
OldMarine Posted September 2, 2018 Posted September 2, 2018 I used the veline colors in my "gumball" shells for the 4th of July and was very pleased with them. There's several in there. 1
Juanma9410 Posted September 3, 2018 Author Posted September 3, 2018 Thank you very much for answering both.So, do you recommend using Veline?The bad thing is that I have pvc and phenolic resin and their formulas have redgum and parlon. Could it be replaced 1: 1?
Arthur Posted September 3, 2018 Posted September 3, 2018 The stars in the bright colour vid are clearly brighter than most colour stars, they show up the smoke trail clearly. Perhaps they are a brighter, whiter comp than veline -usually done with more metal in the mix BUT that means a new, different mix needs testing first. Beware burn rate changes when increasing the metal content and changing the binder.
PhoenixRising Posted September 3, 2018 Posted September 3, 2018 (edited) Personally I think the video itself is a little too washed out to get a good read on what's being used. It appears that the green (assumed) and yellow are indistiguishable from one another. Either that, or they used a whole lot of yellow. Edited September 3, 2018 by PhoenixRising
BetICouldMake1 Posted September 3, 2018 Posted September 3, 2018 Keep in mind that the red gum and parlon are serving as a fuel and chlorine donor in the veline comps. They can be used to bind but the original formula calls for dextrin as the binder. I believe subbing phenolic for red gum usually uses around 20% less phenolic. I'm not sure about pvc for parlon in terms of exchange rate. Both red gum and parlon are readily available online and aren't too expensive, especially if you factory in the time/expense of trying to retool the comp.
OldMarine Posted September 3, 2018 Posted September 3, 2018 The stars in my video above were all phenolic bound but I used Parlon. I've not tried subbing PVC before so I don't know how it would work.
PhoenixRising Posted September 3, 2018 Posted September 3, 2018 I thought the whole video looked great, and the gumballs had a great balance. Really want to play with Veline next year, got my plate full this year already. Lately I'm finding a mix of Parlon and Saran to be good for colors that contain some Magnalium. I feel like high Mg/Al comps tolerate more Parlon a lot better, and in some cases I feel Saran would be a waste to use. I've always found straight Parlon to give my blues a violet tint, so I use only Saran for blues. No experience with PVC, but do plan on getting some this year.
Sulphurstan Posted September 13, 2018 Posted September 13, 2018 To juanma: maybe adding a little titanium to veline would be worth a try?
memo Posted September 13, 2018 Posted September 13, 2018 The stars in my video above were all phenolic bound but I used Parlon. I've not tried subbing PVC before so I don't know how it would work. ball shells or canister pat
Juanma9410 Posted November 24, 2018 Author Posted November 24, 2018 I still have the dilemma of replacing parlon with pvc. Someone who knows if I have to change the percentages?
Adrenaline Posted November 24, 2018 Posted November 24, 2018 I would try substituting parlon with pvc 1:1 and then just go from there. It will probably change the burn speed and maybe the color.If you're looking for a very bright colored star that uses PVC as chlorine donor, I can recommend this formula: Hardt green Ba(NO3)2.................56Red Gum................7MgAl.....................17PVC......................15Dextrin...................5 You can use phenolic resin instead of the red gum.
Sulphurstan Posted December 3, 2018 Posted December 3, 2018 Hello everyone. I use this thread to ask for a another composition (sorry might be the wrong place, please admins, advice if needed 🙄). At 6:23 these long lasting stars are so beautiful, I was thinking of a palm composition, but looks more white than the usual golden palm . Here's the video: Thanks in advance
NeighborJ Posted December 3, 2018 Posted December 3, 2018 Looks an awful lot like the stars I made for this horse tail.https://youtu.be/wqya3pBf3GA If you like I can post the formula I used.
clarkie752 Posted December 4, 2018 Posted December 4, 2018 (edited) Sulphurstan the stars you ask about look to me like a c6 with added sponge titanium probably around 20 to 30 mesh. I made a shell with a similar composition the last 2 years. It was a 6 inch palm. I dont know how to clip out just a single shell from my video so I will post the whole thing. The shell I am talking about is at 18:00 minutes. The comets were 1.5" Inside a 6 inch ball shell. Here it is. Hope this helps Stan. Edited December 4, 2018 by clarkie752
Sulphurstan Posted December 4, 2018 Posted December 4, 2018 Clarkie. Thank you! Yep, that could be the one. Do you remember the proportion of sponge Ti in the c6 composition?
clarkie752 Posted December 4, 2018 Posted December 4, 2018 It was C6 with 20% -20 +30 mesh sponge titanium. It took 800 grams to press 13 comets @ 4500 on the ptof gauge. Comets were 1.25" height by 1.5" diameter. Each comet was weighed when damp at 60 grams before pressing. The shell itself used 7:1 bprh made with paulonia charcoal and 20 grams of 35:35:30 slow flash booster. Like I said this was a 6 inch ball shell. Hope this helps you out Stan.Adam
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