Merlin Posted August 20, 2014 Posted August 20, 2014 (edited) I have not been able to make cut green stars ( they turn out yellow) using this formula. It seems to me there should be some dark aluminum in the formula somewhere. Any suggestions for cut green stars appreciated. Potassium perchlorate 3 Magnalium 3 Barium Carbonate 2 Parlon 0.15 Red Gum 0.05 Sorry for pervious post tried to paste chart and it didnt work. I didnt mention but I am using straight acetone to wet comp per skylighter. Edited August 20, 2014 by Merlin
Jakenbake Posted August 20, 2014 Posted August 20, 2014 Getting a really good green color from barium carbonate alone can be hard. Adding Al to that comp is just going to wash out what little green color there is. Imho you can obtain a far superior green with barium nitrate.
dagabu Posted August 20, 2014 Posted August 20, 2014 (edited) Barium carbonate will make an OK green but your MgAl is too heavy. Potassium Perchlorate 0.288 Barium Nitrate 0.231 Barium Carbonate 0.144 Parlon 0.144 Magnalium, 50:50 200-mesh 0.106 Red Gum 0.048 Dextrin 0.039 Total 1.00 Edited August 20, 2014 by dagabu
rogeryermaw Posted August 20, 2014 Posted August 20, 2014 (edited) I use 30 perc 30 mgal 20 barium carb 15 parlon 5 red gum with decent results. Look at the "rainbow of rubber stars" chart on skylighter. Jake is spot on about the aluminum destroying the color in this formula. Dag, is that a formula you use? Edited August 20, 2014 by rogeryermaw
dagabu Posted August 20, 2014 Posted August 20, 2014 (edited) I use 30 perc 30 mgal 20 barium carb 15 parlon 5 red gum with decent results. Look at the "rainbow of rubber stars" chart on skylighter. Jake is spot on about the aluminum destroying the color in this formula. Dag, is that a formula you use? Yes, it's the Veline Green star formula, Ned also did a full rainbow on "rubber" stars. Edited August 20, 2014 by dagabu
Merlin Posted August 20, 2014 Author Posted August 20, 2014 Yes, it's the Veline Green star formula, Ned also did a full rainbow on "rubber" stars.Yes it was from that color chart that I was using. Also using straight acetone to wet comp for cutting
rogeryermaw Posted August 21, 2014 Posted August 21, 2014 This is the same formula I used in one of my shells in the aerial competition thread. Even in dusky daylight it looks fair. Not great but fair.
Niladmirari Posted August 21, 2014 Posted August 21, 2014 (edited) I have not been able to make cut green stars ( they turn out yellow) using this formula. It seems to me there should be some dark aluminum in the formula somewhere. Any suggestions for cut green stars appreciated. Potassium perchlorate 3 Magnalium 3 Barium Carbonate 2 Parlon 0.15 Red Gum 0.05 I did compositions ВаСО3. Same shit... lights yellow.I think need a stronger source (donor) of chlorine - С2Cl6 or C6Cl6 for this composition. Edited August 21, 2014 by Niladmirari
Merlin Posted August 21, 2014 Author Posted August 21, 2014 I did compositions ВаСО3. Same shit... lights yellow.I think need a stronger source (donor) of chlorine - С2Cl6 or C6Cl6 for this composition.Glad to know I am not the only one to get yellow!!
Merlin Posted August 21, 2014 Author Posted August 21, 2014 Yes, it's the Veline Green star formula, Ned also did a full rainbow on "rubber" stars. Ok. I am new. When making Veline comps or Ned's rainbow comps is it customary to use acetone to wet the comp for cutting or would water be best?
Merlin Posted August 21, 2014 Author Posted August 21, 2014 Barium carbonate will make an OK green but your MgAl is too heavy. Potassium Perchlorate 0.288 Barium Nitrate 0.231 Barium Carbonate 0.144 Parlon 0.144 Magnalium, 50:50 200-mesh 0.106 Red Gum 0.048 Dextrin 0.039 Total 1.00Ok I am going to use this formula. What do you recommend to wet this comp for cutting? Thanks
Carbon796 Posted August 21, 2014 Posted August 21, 2014 I would use water . . .that's why the water activated binder is in there.
Merlin Posted August 23, 2014 Author Posted August 23, 2014 Thanks to everyone. I finally decided on the Hardt formula. Wet with acetone and cut. Used Hardt prime and double primed with Neds hot igniter prime. Bright green even in full Sun. Now on to blue and adding bright flake aluminum for effect. Then on to comets and bp rockets when my shells are perfected. Maybe even to multi component rolled stars if I can come up with an efficient way to roll. I am looking for a way to protect the time fuse on paper shells from getting wet during pasting~maybe a perfectly sized drinking straw over the fuse til pasting is finished. Great hobby for a retiredChemist who is still a kid who loves fireworks.. S
mkn Posted August 23, 2014 Posted August 23, 2014 I am looking for a way to protect the time fuse on paper shells from getting wet during pasting~maybe a perfectly sized drinking straw over the fuse til pasting is finished. SMerlin,I have wrapped a couple of layers of kraft paper with masking tape around the fuse , a little longer than the fuse to fold over the top. Then it stays in place till launch day to protect the fuse and prevent accidental ignition.Matt
jl88 Posted August 23, 2014 Posted August 23, 2014 Hey marlin, not an answer to your original question but in regards to protecting the time fuse during pasting, the yellow end caps used for timed reports are the perfect size to protect fuse. Otherwise if you go to your local mechanic they often have similar plugs that get thrown away. They are used to block the inlet and outlet on new fuel filters. Good luck and have fun. :-)
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