These strobe pot formulas were lifted from the PML and used with the author's permissions. Some of the ingredients may not be available to everyone, but it’s a worthwhile project anyway.
All parts listed are by weight and do not necessarily add up to 100.
Ammonium perchlorate
60
Magnesium, atomized, -100 + 200 mesh, coated with potassium dichromate
30
Potassium sulfate
10
Potassium dichromate, milled dust
additional 2-3%
OR
Ammonium perchlorate
60
Magnalium (magnesium-aluminum alloy) -60 mesh, coated with potassium dichromate
25
Barium sulfate
7.5
Strontium sulfate
7.5
Potassium dichromate, milled dust
additional 3-4%
The blend of sulfates gives a nice clean white with no greenish cast. (For a nice star substitute 10% of the 60 mesh Mg/Al with -200 mesh. Adding a tiny bit of medium mesh titanium makes a fun star.)
For strobe pots, dampen lightly with nitrocellulose solution and tap or press into a thin wall tube with a wood or aluminum rod. Prime as is normal for ammonium perchlorate mixes.
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