This technique which is used to join metallic parts, is through the application of heat. It was discovered through efforts to manipulate iron into useful shapes. The technique of welding, which involves inter-layering metal developed from the need to obtain a continuous joint on large steel plates.
Gas welding, arc welding and resistance welding all developed at the end of the 19th century. The first real attempt to adopt welding processes on a wide scale was made during World War I. By 1916 the oxyacetylene process - a mixture of acetylene (gaseous hydrocarbon) and oxygen which produces a very hot flame for welding - was well developed and the welding techniques employed then are still used today.
Soldered alembics require thicker copper sheets and unlike the riveted union construction, the three parts that make up the pot are brass soldered (see soldering), thus there is no need to use a linseed solution to make them impermeable. The areas which are soldered are then hand hammered again so that the copper may regain its resistance and strength.
You should process a distillation of clean water (see cleaning & maintenance) before using your still for the first time.
A small booklet with complete cleaning guidelines and detailed basic instructions will be sent to you after purchase is made.