The following links might also be of interest to you:
Firework links
Association of the pyrotechnic industry (VPI)
The association of the pyrotechnic industry (German: VPI – Verband der pyrotechnischen Industrie) provides guidance to manufacturers of New Year’s fireworks, professional fireworks, and pyrotechnic ammunition. The major task of the association is to represent economic and technic interests of its members, such as NICO Europe.