A perovskite feedstock is placed in a high-pressure cell of a high pressurehigh temperature apparatus and subjected to pressures in excess of about 2 kbar and temperatures above about 800 C. The proposed drill pipe consists of a body with upset ends and tool joints connected by means of friction welding, having tapered thread and a double coating, the first layer being applied by means of thermo-diffusion zincing and the second one, by means phosphate treatment. At least one electrically conductive element and the electrically resistive portion are arranged such that they are at least partially in contact with the aerosol-forming substrate. When the developer is ready to deploy the model-driven editor, the model developer simply inhibits the model window.