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Question:

How can you make granulated aluminum even finer?

if you cant then can you use 80-100 mesh aluminum in flash powder

Answer:

ask about ti at home depot or just search cunstruction websites
Pliable Metal Sheets
It is difficult to make a fine powder finer without special equipmentYou could try ball milling it, which will flatten the particles into flakes - this increases their reactivity and makes them burn fasterIf you choose to do this, be careful to open the ball mill and expose the aluminum powder to air every hour or so - milling damages the protective oxide layer on the aluminum particlesThe oxide layer will reform when the particles are exposed to air, but this reaction generates some heatIf the oxide layer becomes very spread out/damaged (egafter several hours milling in a closed container) and the powder is exposed to air all at once, it may igniteYou can't use 80-100 mesh Al in flash powder - it would work well for thermite or (depending on the particle shape) for some spark effects.

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