Interesting! Indeed a little extra reading indicates it's the silicates in bamboo (produced more so than incorporated?) that give it some of it's mechanical strengths and high density.
Presumably the pottery shard has something in it as well or is of sufficient softness/hardness to throw the spark?
Stuart when you were cutting through the bamboo did you get any idea the spark was coming off your parang or eminating from the bamboo itself?
Stu
Presumably the pottery shard has something in it as well or is of sufficient softness/hardness to throw the spark?
Stuart when you were cutting through the bamboo did you get any idea the spark was coming off your parang or eminating from the bamboo itself?
Stu