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KNo3 Color starts

Pyrotechnics Pyrotechnics Compositions

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#1 deepakpyro

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Posted 30 December 2020 - 09:34 AM

in my country, it is difficult to get perchlorate chemicals.,

so i have tried making color starts(red & Green) with available oxidizer that Potassium nitrate.

 

this is a green star composition got from  pyrodata.com.

 

Green star #10

 

10
Sulfur
40
Meal powder
10

Charcoal

 

have anyone tried this formula .. i tried it and color is pale orange. 

any suggestion to improve the color output ?.

 

 

 



#2 sora

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Posted 02 January 2021 - 10:17 PM

Unless some metal is added it'll not be hot enough to produce color, besides,you must add some chlorine donor like PVC


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#3 deepakpyro

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Posted 31 January 2021 - 08:06 PM

Unless some metal is added it'll not be hot enough to produce color, besides,you must add some chlorine donor like PVC

yeah, thanks .. tried and results are good



#4 ronmoper76

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Posted 23 March 2021 - 07:27 AM

What did you end up changing to make it satisfactory.



#5 SharkWhisperer

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Posted 23 March 2021 - 01:10 PM

yeah, thanks .. tried and results are good

Deepak hey,

 

You're usually a little more thorough than this. What exactly did you change to improve your results (metals and/or Cl donor? Charcoal remain the same?) and what was the final composition/component ratios?

 

Anw what specific performance improvements did you observe from the pale orangey burn? Ignition ease? Burn rate? Priming type required, if any?

 

Tx.



#6 deepakpyro

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Posted 23 March 2021 - 07:56 PM

Hey,

I have totally changed my formula.
I got rid of meal powder.
I have user PVC powder as chlorine donor and added mgal to increase the burning temperature.

My modified composition is

Barium nitrate -40
Potassium nitrate - 10
Sulphur - 10
Charcoal airfloat - 10
PVC powder - 15
Mgal - 15

But I never tried to make star out of this comp. I just made star mix and light to see the color. Color was decent enough.

Now i have tried the below comp for red satr

https://www.amateurp...ocket/?p=105449

I have added dextrin to bind the stars.

Still exploring the red star's with out kpa

#7 deepakpyro

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Posted 11 April 2021 - 07:18 AM

One of the Red star formula without perchlorate is as below.

Strontium nitrate: 58
PVC :10
Mgal 200 mesh:12
Sulphur:15
Dextrin :5

Made small batch mix for test. Burn with bright red color.


People without access perchlorate can try this formula.
Used only fuse to light this mix.. as a star, step prime would needed.

Edited by deepakpyro, 11 April 2021 - 07:21 AM.


#8 AndyPyroNoob

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Posted 12 April 2021 - 06:59 AM

This is a red Composition I found that I think works nicely......

 

Strontium Nitrate :  62

Potassium Nitrate :  15

Sulfur :    19

Charcoal :  4

 

No Chlorates / Perchlorates -- No Metals :)



#9 SharkWhisperer

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Posted 12 April 2021 - 06:56 PM

This is a red Composition I found that I think works nicely......

 

Strontium Nitrate :  62

Potassium Nitrate :  15

Sulfur :    19

Charcoal :  4

 

No Chlorates / Perchlorates -- No Metals :)

Is all of that oxidizer necessary? Appreciate that you don't want to taint the red coloration with too much charcoal fuel, but seems this would burn up pretty quickly. And no chlorine donors--more expensive than potassium nitrate (cheap in the US at least) and probably strontium nitrate, too, but PVC or Parlon in substitution for some of your oxidizers might give a nice balance between color enhancement and burn rate, and still have no metals. I've personally don't recollect ever seeing a star formulation that used that much strontium nitrate supplemented with KNO3... Seems fuel-poor and chlorine-negligent. But I'm sure it burns quickly. And red. Strontium is forgiving. On ground burns, do you have a lot of solid residue left over? I'd imagine so.

 

Appreciate aiming for no perc/chlorates or metals, but is this what we're looking for? Certainly somebody's tried something similar before.

 

What does it look like coming out of a stargun?

 

Have you tested this "in flight" or are you just making an educated guess? Not nicking you--just asking for additional details. Did you mix/test powder, formed stars on the ground, formed stars in motion? Stars in a completed device?

 

Tx



#10 AndyPyroNoob

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Posted 13 April 2021 - 06:53 AM

First up. I'm a noob.
I spent alot of time working out if I could get particular chemicals for particular comps an colours before I even started my journey into this world :D
 
I had made afew comps, BP, BM etc and wanted to go for a red and a green colour
 
I didn't have any chlorates or metals etc so I thought there must be something out there surely,,,,
 
I came across this comp that stated it was a road flare composition, The attached video shows it being lit as a powder on some paper. I didn't mill it, but i think it would be even better milled.. but haven't tried that as yet.
 
I've not shot it or made it into a star etc as yet. But I know the video doesn't do the colour justice. Its much nicer in real life.
 
I also tried some Barium nitrate and also some parlon and I did get a nice green too but that will need some work
 
Since this video I now have been making myself some KCLO3 :)
 

Is all of that oxidizer necessary?

 
 
As a noob I can't answer this. Maybe I could try it with more charcoal and less nitrates..... see how it performs and what differences there are....
 
Thanks

Attached Files


Edited by AndyPyroNoob, 13 April 2021 - 06:58 AM.


#11 deepakpyro

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Posted 13 April 2021 - 12:22 PM

It's pretty good red color..
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#12 deepakpyro

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Posted 13 April 2021 - 12:28 PM

Since this video I now have been making myself some KCLO3 :)
 
 
Thanks

How you are making ?
Are you in need of chlorate that much and making yourself.
Why do you want to make chlorate by yourself.?

Is it safe ?.
Chlorate is sensitive chem and personally i don't use it even if it is available. With nitrate only you can make many effects.

Edited by deepakpyro, 13 April 2021 - 12:29 PM.


#13 ronmoper76

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Posted 15 April 2021 - 11:33 AM

First up. I'm a noob.
I spent alot of time working out if I could get particular chemicals for particular comps an colours before I even started my journey into this world :D
 
I had made afew comps, BP, BM etc and wanted to go for a red and a green colour
 
I didn't have any chlorates or metals etc so I thought there must be something out there surely,,,,
 
I came across this comp that stated it was a road flare composition, The attached video shows it being lit as a powder on some paper. I didn't mill it, but i think it would be even better milled.. but haven't tried that as yet.
 
I've not shot it or made it into a star etc as yet. But I know the video doesn't do the colour justice. Its much nicer in real life.
 
I also tried some Barium nitrate and also some parlon and I did get a nice green too but that will need some work
 
Since this video I now have been making myself some KCLO3 :)
 

 
 
As a noob I can't answer this. Maybe I could try it with more charcoal and less nitrates..... see how it performs and what differences there are....
 
Thanks

i like how slow it burns



#14 deepakpyro

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Posted 06 May 2021 - 06:43 PM

Here is the nitrate based red star

Strontium nitrate - 60
Dextrin - 5
Sulphur - 14
PVC - 9
Mgal - 12

Color and time of burn is good..

Barium nitrate can swapped with strontium to get green..

More version of nitrate bases star under testing

Edited by deepakpyro, 07 May 2021 - 04:26 AM.


#15 deepakpyro

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Posted 06 May 2021 - 06:47 PM

Testing

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#16 PRANAB

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Posted 07 May 2021 - 01:01 AM

Nice colour Deepak.....
Great job....

#17 deepakpyro

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Posted 05 June 2021 - 09:40 PM

Here is the nitrate based red star

Strontium nitrate - 60
Dextrin - 5
Sulphur - 14
PVC - 9
Mgal - 12

Color and time of burn is good..

Barium nitrate can swapped with strontium to get green..

More version of nitrate bases star under testing

Tried this particular formula and formed cut star, primed by "step prime" method.
1 layer 1mm 50 hot BP + 50 color comp
2 layer 1mm 75 BP+5%mgal + 25 color comp
3 layer 1mm 90%green BP + 10% mgal

I have used 4% dextrin for all layers.

Color on the sky is not bright enough. Its look like color changing star on sky (orange to red) orange due to BP and color comp mix. Tested in 3 inch shell. Stars were burning till it hit the ground.
Overall not upto the expectations.
P.S missed to record the video.

Changed the above composition little bit by adding dark aluminium and output is decent.. fast buring mix on ground. Color is vibrant. Yet to test the star

Strontium nitrate -55
Sulphur - 5
Mgal 200 mesh - 10
Dark Al- 10
Dextrin - 5
PVC - 15


This time swapping the step prime with hot prime (BP+Si).

Any suggestions on prime ?. 2mm prime is enough to ignite the star ?.

Anyone tried similar formula?

Critic/comments/suggestions welcome

Thanks
DN

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Edited by deepakpyro, 05 June 2021 - 09:54 PM.






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