A copper tube of initial diameter D-80mm and 120mm in length. It is proposed operation, reducing its thickness from 10mm to 8mm. The required TNT charge weight using (12.5M) explosive forming process. Using k-75000, n=0.38, C-390000 for TNT. (B) Dome from copper with h,-1mm, D.-1m, D=0.75m, estimate required TNT. Using e=15.48*10 in-lb/lb, 7-0.5, k-7500, n=0.38, (B-B)/D=0.17. (12.5M)