You cannot buy flash powder online or at any other store - that would be like buying C4 over the Internet. You would need to make it yourself from an oxidizer and aluminum or magnesium powder.
Early flash powder was made of thermite. And yes, it was extremley messy and if the pan holding the flash powder wasn't held carefully could easily cover everything
The invention of flash powder is credited to German chemist Adolf Miethe and Austrian-born photographer Johannes Gaedicke in the late 19th century. Flash powder revolutionized photography by allowing for the creation of high-speed, bright flashes of light to capture images.
No flash powder is stronger and also more unsafe! I suggest reading up on the matter if you would like to know more.
Flash powder.
Black powder is a traditional gunpowder made from a mixture of sulfur, charcoal, and potassium nitrate. Flash powder is a more modern pyrotechnic composition that produces a bright flash of light and a loud noise when ignited, typically composed of a fine fuel powder and a strong oxidizer. Flash powder is more powerful and volatile than black powder.
Fine Alumimum powder and potassium chlorate or perchlorate
wash it of with water and soap
The flash point of aluminum powder is not applicable, as it does not readily ignite in its powder form. Aluminum powder is flammable when dispersed in air as a dust cloud, but it does not have a specific flash point like liquids or gases. Proper handling and storage to prevent dust cloud formation are crucial to avoid fire hazards.
Wind.
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