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#41 Ubehage

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Posted 16 December 2015 - 08:46 PM

 

Name of composition: Sunrise yellow
Composition Type: Color metallic
Creator: Pirotex
Color/Effect: Bright yellow 
Precedure/Preparation: Pump with water or 25% alcohol in water.

 

NaNO3 - 55% 
Magnalium - 25% 
S -10% 
Charcoal (airfloat) - 5% 
Dextrin - 5%

 

VIDEO: https://www.youtube....h?v=QIY3sfNq7R0

VIDEO2: https://www.youtube....h?v=BP_YMSAnI24

 

I never really understood how to pump MgAl-based compositions with water.

How safe is that, and do you need Potassium Dichromate?


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#42 lloyd

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Posted 16 December 2015 - 08:53 PM

Sodium nitrate doesn't tend to react vigorously with magnalium, even in the presence of water.  That differs from how KNO3 will react with metals.

 

 

Lloyd


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#43 Sparx88

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Posted 01 January 2016 - 04:16 AM

They can be cut using that 50% alcohol at dollar tree. Use hot prime. 


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                                                                                       .
Finding solace and comfort on my path of pyrotechnic illumination and enlightenment. Painting the sky with strokes of vibrant anticipation and freedom. From spark to spark, the chain reaction of beauty and power that ignite the imaginations and inspirations of young and old alike.        -my pyro sparxs- 

#44 Stef727

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Posted 02 January 2016 - 05:27 AM


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#45 OldMarine

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Posted 02 January 2016 - 10:20 AM

That was awesome Stef, the yellow was bright enough the titanium didn't overpower it.
Come on! Name one other hobby in which you cheer as your money and hard work go up in smoke!

#46 Stef727

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Posted 03 January 2016 - 07:10 AM

That was awesome Stef, the yellow was bright enough the titanium didn't overpower it.

Thanks :)

 

btw I actually added just 35g of Titanium to 400g of sunrise yellow comp, no idea why the tails were so thick, maybe because the stars didn't fly very fast, because of no such a strong break.


Edited by Stef727, 03 January 2016 - 07:15 AM.


#47 Sparx88

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Posted 06 February 2016 - 01:08 AM

Thanks :)

 

btw I actually added just 35g of Titanium to 400g of sunrise yellow comp, no idea why the tails were so thick, maybe because the stars didn't fly very fast, because of no such a strong break.

 

No problem there. I think it broke nice. I see so many other shells that are over way to fast. And a lot of those have to be broke so hard to get any decent size it's like a splash of whatever and gone. There are a type of shell called dahlias  Attached File  cfgd.jpeg   9.98KB   1 downloads  larger longer lasting multi effect or color stars. Not so dense as a peony but more interesting and more capable. Some sunrise yellow for the inner petal and brightened up ruby red outer should make that pic. P.s. I like sunrise yellow :)


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Finding solace and comfort on my path of pyrotechnic illumination and enlightenment. Painting the sky with strokes of vibrant anticipation and freedom. From spark to spark, the chain reaction of beauty and power that ignite the imaginations and inspirations of young and old alike.        -my pyro sparxs- 

#48 arunprasad

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Posted 28 September 2018 - 02:01 PM

Eric70, Classic BP +5% magnalium, or just BP

what is classic BP?



#49 Pirotex

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Posted 30 September 2018 - 01:34 AM

arunprasad, 75/15/10 (KNO3/C/S)

#50 dynomike1

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Posted 30 September 2018 - 03:44 PM

I have put sunrise yellow in a 4" shell and it was really bright.


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                             Explosives are a bang up job.

#51 memo

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Posted 30 September 2018 - 03:44 PM

i have mis-placed (lost) my paper on how to make sodium nitrate. one was with bicarbonite and amonium nitrate  . the other with lye any one have ???

 

memo



#52 greenlight

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Posted 01 October 2018 - 06:12 AM


NH4NO3 + NaHCO3 → NaNO3 + NH4HCO3

Dissolve 80g (1 mol) of ammonium nitrate into 150 ml water and add directly to 84g (1 mol) sodium bicarbonate. Boil down to about 1/3 original volume to decompose ammonium bicarbonate into CO2, NH3 and H2O and remove. This leaves sodium nitrate that can be collected by evaporating down.


NH4NO3 + NaOH → NaNO3 + NH4OH

Make two solutions with 100ml or so water for each, one with 80g (1 mol) ammonium nitrate and the other with 40g sodium hydroxide (1 mol).
The mixing of sodium hydroxide with water will be quite exothermic.
Mix the two and boil down to evaporate out the solid using gentle heat at the end. The ammonium hydroxide byproduct formed will degrade into NH3 and H2O and you can heat for a while to reduce volume and ensure this.
Evaporate as normal to dryness to collect the sodium nitrate.

Both reactions produce ammonia so do this outside or in a fumehood.

#53 memo

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Posted 01 October 2018 - 08:11 AM

thanks greenlight



#54 arunprasad

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Posted 12 October 2018 - 08:54 PM

 

Name of composition: Sunrise yellow
Composition Type: Color metallic
Creator: Pirotex
Color/Effect: Bright yellow 
Precedure/Preparation: Pump with water or 25% alcohol in water.

 

NaNO3 - 55% 
Magnalium - 25% 
S -10% 
Charcoal (airfloat) - 5% 
Dextrin - 5%

 

VIDEO: https://www.youtube....h?v=QIY3sfNq7R0

VIDEO2: https://www.youtube....h?v=BP_YMSAnI24

 

magnalium size?



#55 arunprasad

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Posted 12 October 2018 - 08:55 PM

arunprasad, 75/15/10 (KNO3/C/S)

thanks , dextrine can be added to this prime? 



#56 Sulphurstan

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Posted 13 October 2018 - 03:09 AM

Arun,think of it, how will the prime stick to the stars without a binder? 😀

#57 Pirotex

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Posted 27 October 2018 - 01:24 AM

arunprasad, 100-150 mesh. With dextrin ofcourse

#58 Sulphurstan

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Posted 08 November 2018 - 02:45 PM

@pyrotex: i just made a 100g of your sunrise yellow stars, i'm at 58% relative humidity and temp 15deg celsius, they cannot dry properly (5 days in drying box...), still crumbling very easily...
My nano3 is lab grade, so the impurities are probably not responsible for this issue.
Question is: did you tried to bind them on pvb/alcohol basis instead of dextrin?
I'm gonna give this a try.

Edited by Sulphurstan, 08 November 2018 - 02:46 PM.


#59 memo

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Posted 08 November 2018 - 05:33 PM

what temp is your dry box ?



#60 Sulphurstan

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Posted 09 November 2018 - 01:53 PM

In fact my drying box is just ambient temperature air flowing with 2 CPU fans blowing through wired meshes. Then, for "end drying" the stars stay a week or two in a airtight container with calcium chloride. It always works with non hygroscopic compositions, but with the nano3.... That's why I also don't make my reds with srno3, cos I know it could be quite difficult.... Should have a real drying box, I know....

Edited by Sulphurstan, 09 November 2018 - 01:53 PM.





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