when searching through databases of pyro compositions (like PyroData), I was always wondering what was the point of using some dangerous and not so common chemicals - maybe somebody here will know more?
1) Hg2Cl2 and PbCl2 - were they used as Cl donors??
2) Paris green - a blue colorant, but is it any better than CuCO3, CuCl2 or so?
3) Sb2S3 - it seems like it is a fuel, but what makes it better than just S, C or organic fuels?
4) As2S3 - i'm not sure what it was supposed to do
Also, most old recipes from my grandfather's notebook contains both KClO3 and S :-D