✔ 最佳答案
in movies, they usually use dry ice
in army, they use "wet leaves"
actually, using charcoal is quite good because it will produce a large amount of tiny carbon particle. A rich black soke is produce
can you tell me something more?
1. what is your purpose?
2. what colour do you want
3. want smell?
4. can it be toxic?
2007-08-03 22:46:42 補充:
in war game-.- are your serious?you may use black somke, using wet leaves to make a fire, there will be a large amount of somke
2007-08-03 22:46:49 補充:
if possible, using dry ice is a cheap, convenient and safe wayget lumps of dry ice and pour water onto the surface of ita very large amout of white water vapour will be produced(caution: if the dry ice is kept in a box, it may explode)