loading
Picture of Making German Dark Aluminum Powder from Foil
   This is an instructional for manufacturing your own homemade German Dark Al powder. Homemade aluminum powder may not be as good as Eckart aluminum powder; however it is practical for use in pyrotechnics. German Dark Al powder is a particular aluminum powder that has charcoal added to it to prevent oxidation while milling. Not only does charcoal prevent aluminum from oxidizing into aluminum oxide as it mills, it also makes the aluminum powder more reactive bringing about an acceptable product for pyrotechnics. German Dark Al powder is a key ingredient in many pyrotechnic compositions especially in low grade explosive compositions such as flash powder. German Dark Al powder can range from a coarse grade such as 100 mesh to a super fine grade such as 7000 mesh. The finer the grade of the aluminum, the more reactive it is.


Materials:
Aluminum foil
Willow charcoal (1 tablespoon)
Ball mill (or rock tumbler)
Steel media
Measuring tape or ruler
Scissors (or your hands)

Step 1: Measuring the Aluminum Foil

Picture of Measuring the Aluminum Foil
First, what you’ll need to do is use your scissors to cut ten 18 inch long pieces of foil.
 

I would think you would want the steel balls to not be coated at all, so none of the coating can chip off the way it sometimes does.

leenewman1 year ago
Can't you use hardened lead balls?

I would say no, for hardened lead still is softer then Aluminium, thereby it will consumed in the milling process, and contaminate your product...

If I milled the aluminum for a longer period of time and also milled it with a bit of stearin do you think it would work as well as the Eckart? Thanks! You should try it sometime
Nice job! That ball milling really broke it down!
Ammonal (author)  Penolopy Bulnick2 years ago
Thank you for your comment.