Hey Jean,
You are in full control as to when the paper is ignited and currently I have two methods of ignition with a 3rd on its way!
It can also smoulder images away, so no fire. Vid here
http://www.youtube.com/watch?v=IJQ-z2lg7PQ - I hand-make the paper and it is normally a slower burn than in the clip, I made a bit of a potent batch. No flash paper is used, and no liquids and no gases.
Bespoke frames can be made. There are some limitations concerning carvings but is still possible.
