Shimizu AP twinkler

[GermanPyro]

Hello Pyros,

 

I need your help, because I am a little bit confused.

 

Shimizu specified in his book (art, science & technique), magnesium must be used for AP twinklers, only white twinklers use magnalium.

 

But inside the encyclopedic dictionary of pyrotechnics is specified to use magnalium for all twinkler formulas?

 

What is correct??? Magnesium or magnalium???

 

Thx for help!

 

Stefan

[Adrenaline]

Shimizu's strobe formulas generally use magnesium. I have never heared of anyone using magnalium.

There are some colored strobe formulas out there which use magnalium, however they either use exotic chlorine donors ( Kinsei/Bleser's colored strobes which use hexachlorobenzene) or

are unreliable in terms of strobe frequency and quality of color (http://www.amateurpyro.com/forums/topic/3886-red-nitrate-strobes/).

Edited September 19, 2017 by Adrenaline

[OldMarine]

Most all of the strobe star comps I found in my reading use mgal rather than mg. I don't think mgal was as readily available back when Dr Shimizu was working on strobes.

[GermanPyro]

Thx!

[Maserface]

Shimizu was studying the use of MGAL in strobes in 1955, and talks extensively about it in FAST. MGAL works well with AP/sulfate strobes, but washes out any color, magnesium is therefore used. Shimizus white AP/sulfate strobe contains mgal.

 

See FAST, page 223

[OldMarine]

I stand corrected. I only read the first part of the chapter before commenting.

[Maserface]

Notice this time I DO HAVE a page number

[OldMarine]

Notice this time I DO HAVE a page number

AND it matched my edition of the book!

Page 15 of Pyrotechnica V lists some of Dr Shimizu's MgAl twinkler compositions. Unfortunately all contain Benzene Hexachloride which I've never run across.

Edit; This article from SL seems to say it's just a chlorine donor that can be replaced with Dechlorane plus or similar donors.

http://www.skylighter.com/fireworks/making-fireworks-projects/chlorine-donor-fireworks-chemicals.asp

Edited September 19, 2017 by OldMarine

[Maserface]

There is also some info on strobes in Fireworks from a Physical Standpoint, which I think you have..

 

Benzene Hexachloride unfortunately is not commonly available, and in the case of colored nitrate strobes pretty difficult to replace.

[OldMarine]

I have a half jug of Lindane that I've kept since I was a kid.We used it under foundations for outbuildings for termite protection. I believe this is the same chem.

Any idea which volume contains the twinkler info? Unfortunately there is no index.