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Violet star

purple violet

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#1 carbonhalo

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Posted 01 September 2016 - 03:25 AM

I couldn't find a purple star using what chems I had on hand while offline, so I took a red (#4) and a blue (#3) from the pyrotechnic cookbook and combined them in the ratio used by Veline (80% blue, 20% red)

 

I made them as a cut star using acetone as solvent.

I overwet the mixture causing some of the red gum to run out of the mix during the roller flattening, but it didn't run off the baking paper I dried it on.

They took 2 days to dry and lit so easily that I primed them with only BP.

 

Potassium Perchlorate. - 59.2

Copper Oxide -               10.4

Red gum -                      12

Parlon -                          12.8

Strontium Nitrate -           6.2

 

Attached File  Violet 1.jpg   26.59KB   8 downloads

 

 



#2 braddsn

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Posted 05 September 2016 - 05:34 AM

Wow, that is a beautiful color! I am gonna head out to the shop and try it myself! Thanks!! Is there not any metal (MgAl) in it??


Edited by braddsn, 05 September 2016 - 05:35 AM.

Always out of Parlon. 

#3 carbonhalo

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Posted 05 September 2016 - 02:40 PM

No metals...unless you count the copper and strontium



#4 CrossOut

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Posted 05 September 2016 - 03:46 PM

Pretty.  

 

If you are still looking for compositions, 

 

My favorite so far is Shimizu Violet. 

 

Potassium Perchlorate. - 64

Copper Oxide -               5.2

Red gum -                       9.5

Parlon -                           8.7

Strontium Carbonate      7.8

 

Similar comp. burns nice deep violet.



#5 NeighborJ

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Posted 05 September 2016 - 05:08 PM

I love the shimizu violet but it needs step primed. I screwed up my last batch by not doing so and now I've got a bunch of stars which cannot be lit. I can try to remove the Monocapa and prime them right but it will be easier to toss them.
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#6 braddsn

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Posted 06 September 2016 - 05:47 AM

Neighbor you do not need to toss the stars. Monocapa will light anything, as long as you now add a final layer of bp prime. Add 1.5mm of bp prime and you will be all set!  :)


Always out of Parlon. 

#7 NeighborJ

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Posted 06 September 2016 - 06:36 AM

Well I believe the shimizu stars were intended to use water as the solvent. I used acetone and they turned hard as steel and take a heck of a lot to ignite. The Monocapa is not blowing blind it won't ignite the star sitting on the ground without a blowtorch. I may just drill a hole thru them and glue it to a 4 oz motor as a colored rocket effect.

#8 ExplosiveCoek

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Posted 06 September 2016 - 11:27 AM

Probably all the red gum/parlon got dissolved and dried really fast, creating a fire resistant shell of fuel around your star.

 

If the Monocapa was rolled on with water it can be removed, otherwise I don't think so. I also wouldn't advice to trill in star compositions.. Just tosh them in the bonfire or something.



#9 NeighborJ

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Posted 06 September 2016 - 12:20 PM

Explosivecoek you are right about not drilling into the star if you aren't expecting it to light. But if you treat it as if it will light then I aint skeerd. I light stars with a lighter often and the flame envelope is simply not that big. If the shavings are cleaned up as they are made and the bit is kept cool then the danger is very minimal.
These stars were made in a star pump and pressed hard then allowed to dry very slow so I believe the hard shell is thru and thru. I've given up on this batch anyway and are awaiting my next campfire. They are chalked up as learning experience.

#10 Jsugarlog

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Posted 06 September 2016 - 04:17 PM

im curious, i have been looking for a good book and you mentioned one. which one would that be?



#11 AzoMittle

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Posted 07 September 2016 - 10:30 AM

im curious, i have been looking for a good book and you mentioned one. which one would that be?

 

What kind of books are you looking for? I don't see any mentioned here.

 

I already recommended a rocket propulsion theory book in your other thread by the way.


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#12 MudDuckPyro79

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Posted 18 March 2017 - 02:23 AM


Here is a 1.75 test shell of violet from Ned rubber stars they seem kind of washed but the fireworks color checker at end of vid said it looked like purple.lol she loves this stuff lol
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