Silver-clad tapes of highT_c Bi-Pb-Sr-Ca-Cu-O superconductors have been fabricated through the powder-in-tube method. The critical current density, J_c, of a thick tape was 534 A.cm⁻² (77 K, 0 T). Subsequent rolling and sintering of the tapes led to a gradual decrease inJ_c, instead of the expected increase. This was caused by the microcracks developed in the core material by a rather drastic reduction during the rolling of the tapes. A modified and well controlled rolling technique, on the other hand, resulted in much improvedJ_c values. Repeated rolling and sintering resulted in a good grain alignment and no microcracks were observed. In the present studies, maximumJ_c of 1846 A.cm⁻² (77 K, 0 T) and 2.43 × 10⁴ A.cm⁻² (4.2 K, 0 T) have been obtained Optimization of the processing and sintering parameters are expected to lead to still higherJ_c values.