Gold Crown Comp

[pyroguy1960]

Any one know the comp for these stars? I believe they're called gold crown. Here's a vid that has a bunch of them going off...

 

[dagabu]

Mumbles is going to straighten me out on this I am sure but i think they are an aluminum based charcoal star, Takeo Shimizu has a comp that uses lots of Al.

 

Potassium Nitrate 40

Aluminum, flake, flitters, coarse. -20 mesh 30 http://www.passfire.com/images/clear.gif

Realgar 10 http://www.passfire.com/images/clear.gif

Sulfur 10 http://www.passfire.com/images/clear.gif

Rice Starch (glutinous) 7 http://www.passfire.com/images/clear.gif

Charcoal Airfloat 2 http://www.passfire.com/images/clear.gif

Boric Acid 1 http://www.passfire.com/images/clear.gif

[pyroguy1960]

I found this one....seems similar, that's the only thing I don't really like about FAST, it's seems to be starting to show it's age in some of the comps or perhaps some of the chems are more popular in the orient. I know realgear seems to be getting harder to source.

 

Golden wave #1 - #3

Potassium nitrate 37

Aluminium (flitter) 47

Antimony trisulfide 9

Boric acid 1

SGRS 6

 

And suposedly sufur can be subed for the antimony and I would probably use dexrtin instead of SGRS.

 

Seems like the bottom line for this effect is KNO3 for oxidizer and lots of course flitter.....

 

 

 

[pyroguy1960]

Also do you need the Boric Acid if the flitter AL is coated?

[Xtreme Pyro]

What about the Slow Gold comp? Ive seen videos of these stars and it looks similar to the video you posted defiantly a beautiful star.

 

Potassium Nitrate: 36

Charcoal Airfloat: 29

Charcoal, 80 mesh: 14

Sulfur: 9

Titanium, sponge, 40-80 mesh: 7

 

Dextrin: 5

[Mumbles]

I've actually never seen the golden wave formulas in person. It's really a shame I had my accident. I had just gotten some realgar to try out that formula. It's supposed to be quite a bit more elegant than the sulfur or antimony trisulfide versions.

 

It does looks like a charcoal and aluminum streamer. I've always called them metallized willows, but that doesn't give a distinction between a formula like that and one relying on titanium or ferroti.

[pyroguy1960]

Skylighter has some realgear, I'll get some and try both comps and report back in a few weeks....

[Karlos]

Shells in the video contains brocade type formula, with titanium or ferrotitanium, not golden wave, not golden chrysanthemum. These compositions are quick burning types, and brocade not. Slow gold can be similar.

[pyroguy1960]

can you hit me with a formula? Is that the consensus?

 

 

[pyroguy1960]

Found this for slow gold

 

Potassium Nitrate: 36

 

Charcoal Airfloat: 29

 

Charcoal, 80 mesh: 14

 

Sulfur: 9

 

Titanium, sponge, 40-80 mesh: 7

 

Dextrin: 5

 

 

[Xtreme Pyro]

Found this for slow gold

 

Potassium Nitrate: 36

 

Charcoal Airfloat: 29

 

Charcoal, 80 mesh: 14

 

Sulfur: 9

 

Titanium, sponge, 40-80 mesh: 7

 

Dextrin: 5

 

That's the same formula I posted above. Like I was saying before, it looks very similar to the effect your looking for.

[pyroguy1960]

gotcha, sorry I missed that....

[pyroguy1960]

in further researching, the slow gold looks more like willow diadem no?

 

http://www.youtube.com/watch?v=zslxX_tX8Sw

 

http://www.youtube.com/watch?v=PZLLAJULxPI

 

I'm gonna have to try each and every one until I find the effect that mirrors those shells in the original video aren't I.

[AdmiralDonSnider]

I´m not an expert either, but the color of these as well as the short hang time doesn´t make them seem like brocade shells.

 

Shimizu´s "wave" comps may be worth a try - as already suggested - and antimony sulphide may be tried as a realgar replacement.

 

Maybe we are simply not up to date on this one. The formula could be way different from all we have at hand...

[dagabu]

Who has time to take a look at FAST? I think Takeo Shimizu can answer this question quickly for us.

[Mumbles]

Slow gold, and every "brocade" I've ever seen, is kind of twinkly. They have a slight firefly transition effect. I really don't think there is any titanium in those, or if there is, it is quite fine.

 

I would take a willow and add 15 or so parts of wide mesh range flake or atomized aluminum. I don't know who sells it anymore, but there is a 100-325 mesh bright flake available that may work. Below are two products that might work. The second looks a lot like the bright flake I'm talking about.

 

http://www.hobbychemicalsupply.com/servlet/the-107/Alcoa-120-atomized-aluminum/Detail

 

http://www.hobbychemicalsupply.com/servlet/the-98/Aluminum-German-Bright-Flake/Detail

 

You might need some coarse flake for the terminal end of the tail.

[pyroguy1960]

Here is what was in FAST.

 

[AdmiralDonSnider]

Anyone willing to post the initial question on rec.pyro? I´m pretty sure they´ll show us the correct path...

[Karlos]

Another videos from Katakai (kanreki fireworks)

http://www.youtube.com/user/HANABI10GOU#p/u/59/Ht9V3vafrS8

http://www.youtube.com/user/hanabian#p/search/0/druHeYaHLSU

For me, look like blackpowder - metal fire dust, long-life stars. Weak light, slow burning, partly twinkling sparks(slow glitter). Japanese often use ferrotitanium but maybe it´s aluminum. Aluminum often create more silver efect.

 

 

jms04081974: you can find some formulas on passfire, in charcoal streamer stars. (slow gold, gold streamer, nishiki kamuro, golden kamuro)

[pyroguy1960]

So I stared down this road tonight, the first comp I'm trying is Golden Wave #1 from FAST:

 

potassium nitrate 37

aluminum course flitter 47

antimony trisulphide 9

boric acid 1

SGRS 6

 

How do I prime this comp? Seems like it will be hard to light.

 

I was thinking of doing my usual greenmix w/5% mgal for inner prime, then greenmix for outer layer. Any suggestions? FAST doesn't tell you what to prime it with.

[dagabu]

I suggest a two stage prime, green outside like you said and a 50/50 BP and star comp for the inner layer.

[pyroguy1960]

k....thanks

[pyroguy1960]

So I have some results after tonights shoot. The two comps I tried tonight are yellow glitter and golden wave No.1, like an idiot I forgot my camera so I don't have vids.

 

The Golden Wave No.1 was not even close the effect in the video I posted in the start of this post. It looked very similar to willow diadem, but burned out a little faster.

 

The yellow glitter was closer, but the sparks were somewhat course and it strobed as it was burning out. It was still a very nice shell though. So the hunt continues.

 

Here are the two comps.

 

Yellow Glitter

 

Potassium Nitrate 48

Airfloat Charcoal 9

Sulfur 11

Aluminum (12-20 micron, atomized) 9

Antimony Trisulfide, Chinese Needle 10

Sodium Bicarbonate 9

Dextrin 4

 

Golden Wave No. 1

potassium nitrate 37

aluminum course flitter 47

antimony trisulphide 9

boric acid 1

dextrin to taste

 

On a side note, you all probably already know this but if anyone is chasing perfect chrysanthemum (warimono) breaks. The FAST recomendations have been spot on for me, absolutely perfect breaks. One of the shells I shot tonight was an 8" and per FAST I used the Pot Perc No.5 coated 1.3:1 onto cotten seeds, the break was excellent. Nice big round and forceful, but not to much, just perfect.

[pyroguy1960]

So I've found the winning comp, this is an 8" shell and could have probably been a little better with larger stars, but still it was very nice. Sorry for the shaky camera work and the peanut gallery.

 

Thanks to Karlos & Gorski for comfirming the comp offline before I tried it.

 

KNO3 - 29

Pine C - 34

Sulfur - 6

FeTi (mixed) - 25

Dextrin - 6

 

[dagabu]

That was a beauty!