Plant starch (clubmoss) for explosions and flash effects — ignites instantly with brilliant yellow flame. Classic practical effect, largely superseded by VFX.
Lycopodium — the powder of the club moss — was the weapon of choice for decades when it came to fast, visual effects. The stuff burns practically instantaneously with an intense, yellow-white flame. On set, you notice it immediately: a handful blown into the air, and you have a controllable explosion with extreme luminosity. No fuss, no delay — that's the beauty of this material. Grips and effects technicians used it to realize lightning, bangs, and small pyrotechnic sequences where other methods were too slow or too unpredictable.
The classic application: You take a blowing device — a simple bellows or a compressed air system — fill it with lycopodium, and ignite the powder at the exit point. This creates a bright flash flame with immediate intensity. For close-ups of shots, exploding objects, or mystical energy releases, this was long the only way to get real light and real movement. The advantage over pyrotechnic cartridges: more precise control, less vibration, a clean cut between ignition and effect. The material is non-toxic, leaves minimal residue, and burns completely.
Today, lycopodium is much rarer on professional sets — digital effects and specialized cold pyro systems have taken over much of it. But in smaller, indie productions and in theater, the material lives on. It also has an unpleasant property: the powder is highly explosive in concentrated form. Packed too densely or handled incorrectly, it creates not just a flame, but a real detonation. That's why handling is regulated. You need certification and considerable caution. Modern grip teams prefer to use LED effects, digital compositing, or specialized effect paints that burn more controllably. But anyone who still knows and respects the classic material knows: it delivers an optical authenticity that is difficult to fake digitally — an immediate, energetic presence that the camera captures.