Yankie's KP Purple

[TrueBluePyro]

haha, now ur just taking the piss...so sad, that you have to be like this. Oh well, we all have to put up with the dick heads in this world. I'm not the only one who thinks this...

[Mumbles]

I'm just saying give credit where credit is due. It's not my formula, so I really don't care, but I also don't want to see Yankie losing out on his hard work. I probably should have taken it up in private in retrospect. I'm well aware there is a non-negligible population that doesn't like me for one reason or another.

[Yankie]

This composition rolls very well too. Beautiful color, thanks Yankie, this is your second best one yet .

Thanks Swervedriver, I might have to add my silver to the list, its not bad. The rising comet of this shell is just some of the silver stars glued on top:

(the stars in the shell are not my silver, they are shit)

Do you think it is worth posting the formula?

[justanotherpyro]

Cool formula Yankie. Unfortunately I can't get as deep a purple as I would like but its still a pretty color. I have been experimenting replacing the MgAl with hexamine for the fuel and I have achieved some decent results. It might be worth a try to supplement the MgAl fuel with hexamine too to widen the flame envelope while still getting the nice color from the MgAl.

[Swede]

Yankie.... Likie!

 

Purple was a color I was having much trouble with, and this one seems to work very well. My earlier efforts always had a problem with ignition. Well done, and an easy formula to boot, nothing especially exotic.

 

I'd like to experiment a bit with the elimination of magnesium to see if it can be done. For many, magnalium is a kind of "limiting" chemical, typically harder to get than plain Al. But the color is beautiful. Thanks.

[Mumbles]

I just made up a kilo of the composition to try it out. I had to make a last minute substitution. It has 50g of Parlon, and 100g of Saran in it. I ran out of parlon at my manufacturing place. I have plenty elsewhere, it was just too late to get more. I guess it shows how often I use Parlon that I didn't realize I was almost out. I think it will be just fine, though maybe a little more to the red side of things, and faster burning from the higher temperature. I'm sure it will still be fine.

[Pyro09]

Could I use this formula also with KCLO3 instead of KCLO4? Or is it too dangerous (in combination with MgAl)?

 

Greetz

[Ignes]

Needed a yellow, so I substituted the CuO and SrCO₃ for cryolite (Na₃AlF₆).

 

Formula for Yankie KP Yellow would be:

 

Color/Effect: Yellow

 

The Composition: (by weight)

 

KClO₄.........................50

Parlon.........................15

Cryolite.......................21

Red Gum.......................8

MgAl (325 mesh)............5

 

Needs a better prime then Yankie KP Purple, meal is not enough. A thin layer of meal + MgAl does the job though.

 

Edited December 17, 2009 by Ignes

[firetech]

Aha! A good/decent yellow! Thanks Ignes.

[Lionel]

I Really liked that purple

[Skycastlefish]

I really like that purple too. I've been asking people for the last, I don't know, 3 months if I can pump/ram stars with this comp. Passfire, silence, here, nobody noticed, one last time. Can I pump this comp with a drift, sleeve, and mallet? Edited September 19, 2010 by Skycastlefish

[Ralph]

so long as the composition is dampened first yes if not you have a slightly sensitised than desensitised flash so no it would be bad to hit dry so either press it or dampen it

[Skycastlefish]

so long as the composition is dampened first yes if not you have a slightly sensitised than desensitised flash so no it would be bad to hit dry so either press it or dampen it

Thats what I've been looking for. Thanks Ralph.

[superspike23]

I tried the formula Yankie's kp purple.

Wet with acetone and cut.

 

http://www.youtube.com/watch?v=hUr5-SPygsE&feature=share&list=UUlrHWRVpLwNwtNgHEZaS4Ow

 

I like this color.

[Zumber]

I tried the formula Yankie's kp purple.

Wet with acetone and cut.

 

http://www.youtube.com/watch?v=hUr5-SPygsE&feature=share&list=UUlrHWRVpLwNwtNgHEZaS4Ow

 

I like this color.

Ahh.!

cool colour. .!!

weldone....Try out now in shell......

[pex]

Thanks for the composition. Works great. I used mixed magnalium. From airflaot to 80 mesh. And they buren a bit slow. But i like that

[LambentPyro]

I tried the formula Yankie's kp purple.

Wet with acetone and cut.

 

http://www.youtube.com/watch?v=hUr5-SPygsE&feature=share&list=UUlrHWRVpLwNwtNgHEZaS4Ow

 

I like this color.

What was the star size?

Edited June 10, 2014 by LambentPyro

[SharkWhisperer]

So, I'm reviving a 6-years-since last post thread, but nice purples are always worth revisiting. I'd tried Yankie's KP Purple without and then with minor modification:

 

50 Potassium Perchlorate

15 Parlon

12 CuO

9 Strontium Carbonate

8 Red Gum

5 MgAl (325 mesh)

 

Powder was burning nicely on a ground burn but not so deep purple as I'd wanted--leaning towards a violet and the metal desaturation effect was clearly showing. So I screened in +10 Copper Oxychloride and powder burned closer to purple but now was leaning towards a hint of reddish fuschia undertones and still appeared a little washed out by the metal. Acetone bound (20% by weight, which was perfect) and screen-cut (4-mesh) and rolled damp while step-priming with a screen-mixed hot perc prime (71% Perc/14% airfloat--half ERC, half generic hardwood/9% red gum, and 6% MgAl -200 mesh + 3% silicon 200 mesh) followed by a screen-mixed BP prime (67% KNO₃/14% same charcoal mix/9% sulfur/5% MgAl -200 mesh, and 5% red gum + 5% silicon, using 91% IPA as dampening solvent. Ended up with 4-5 mm balls after first minutes of gentle hand rolling to round edges before drying. Primed heavily with pure hot perc prime, then a mixture of hot and cold BP prime, and finished with BP prime dusting. Most stars were approximately 1/4" diameter (6-7 mm), with a few in the 5 mm range (just over 3/16"). Dried 4 hrs and static ground burnc test showed a reasonable and pleasing purple-fuchsia color, still a little lighter than I'd have preferred.

 

Shown is a clip of a 1" mini-mine hard-launching 16g stars (1/4") with 2.4 g 10-mesh hot willow lift, with 2 grams of star-screened composition/prime fines containing 20% titanium added loosely among the stars for a little extra splash out the barrel. The heavy priming likely wasn't necessary and the first frames show a 20-foot blast of yellow burnoff that quickly changed to some really deep purple--approaching royal blue--fireballs that peaked at 40-50 feet apogee. Had 100% ignition with reasonable initial lift velocity, so overall was pretty pleased. What still needs improvement, perhaps, is enhancing saturation. Maybe by reducing the metal or by slowing the burn with a fraction or replacement with cooler fuels like hexamine or lactose? Although it wasn't very noticeable by eye during several similar launches, you can see the camera apparently caught multiple brief yellow-orangish glowing remnants at the end of the burn. This too, I'd like to eliminate, and wonder if it isn't possibly glowing slag from the parlon or gum remnants. Though primed heavily with charcoal-containing mixtures, I can't envision that any BP components are still burning at apex when the purple is finishing it's max effect--seems more of a low-level orangey glow...

 

Suggestions and hypotheses are always welcome.

 

Shark

[kingkama]

It's a good color but needs some tuning, parlon is too much it's a good chlorine donor so 8 will works, CuO is far too much and the same for strontium carbonate, the orange tint come in my opinion from an excess of copper and an excess of oh group from the oxichloride, so 6 of CuO and 6 of carbonate will works better, variation on percentage ad blue or red on choise. I think that remove the mgal and subs with pure mg could be a major value. Another way is eliminate the metal and use only red gum, may be 10 a good point, in case a bit of pvc to act as combustible if there is too much oxigen from perchlorate, a oxigen deficiency will go for a cooler stars that reinforce the blue emission. Well let me known if you find usefull some of my hints. Thanks for share composition.

[SharkWhisperer]

It's a good color but needs some tuning, parlon is too much it's a good chlorine donor so 8 will works, CuO is far too much and the same for strontium carbonate, the orange tint come in my opinion from an excess of copper and an excess of oh group from the oxichloride, so 6 of CuO and 6 of carbonate will works better, variation on percentage ad blue or red on choise. I think that remove the mgal and subs with pure mg could be a major value. Another way is eliminate the metal and use only red gum, may be 10 a good point, in case a bit of pvc to act as combustible if there is too much oxigen from perchlorate, a oxigen deficiency will go for a cooler stars that reinforce the blue emission. Well let me known if you find usefull some of my hints. Thanks for share composition.

Appreciate the keen insights, King! Agree it needs tuning. My chems are top-quality, so I was questioning if the previous posters really got that deep purple from Yankie's unmodified formulation--I certainly got closer to poorly-saturated dark violet w/o the copper oxychloride... Could be different chems. Could be different cameras. Could be different visual perceptions. In my mix, I'd think the strontium would be more potent than the copper oxychloride's OH^- anion in imparting an orangish hue. This really wasn't an issue until star burn-out. where i noted an orangey tint to the extinguishing embers, but perhaps your suggestion to reduce the parlon (and my guess that parlon slag is tinting orange at burn-out) would fix this. Ah, I see you also suggest a reduction in strontium carbonate, which might help. I'd expect reducing MgAl would help with the saturation issue, but substituting with straight Mg is probably not going to be my first fix for 2 reasons: 1) I only have -100 mesh pure Mg at the moment, and 2) though not working with nitrates in this comp, Mg's increased general reactivity may become an issue in future changes to the comp.

 

I appreciate your thoughtful dissection of my comp vs issues very much, and will make changes along those lines on the next batch, for sure. And will report on effects of those changes.

 

Thanks again, amigo!!!

 

SW

 

p.s. To give credit where credit is due, the original comp was listed at the start of this old thread--by Yankie. My only modification was the addition of Copper Oxychloride to try to enhance the purple, which I was not able to reproduce (to my liking) from the base formulation...

Edited May 20, 2020 by SharkWhisperer