Question, does the NEC indicated on a firework just tell you how much explosives is in the firework or does it include all powder in the firework.
For example
Firework contains 100g NEC but weights 1KG now does that mean there is 900g packaging or would there be other powder that's not classed as explosives in the firework.
For example
Firework contains 100g NEC but weights 1KG now does that mean there is 900g packaging or would there be other powder that's not classed as explosives in the firework.