Inspired by a comment by bharata bharatavanshi.
The production of zinc by conventional smelting methods presents considerable difficulties; instead of a liquid metal forming at the base of the furnace, zinc forms a highly reactive vapour (with a boiling point of 913°C) which exits the top of the furnace and promptly re-oxidises. Clearly, some method of containing and condensing the vapour out of contact with the air was needed
By the early second millennium AD, these descriptions had become more detailed. The retort was to be shaped like a brinjal, or aubergine, the condenser shaped like a datura, or thorn apple flower, and the zinc ore was shaped into small balls, still using the exotic organic ingredients.
It is the pioneering steel alloy matrix developed in Southern India in the 6th century BC and exported globally. It was also known in the ancient world by many different names including Wootz, Ukku, Hindvi Steel, Hinduwani Steel, Teling Steel and Seric Iron.
Wootz steel originated in India. There are several ancient Tamil, Telugu, Greek, Chinese and Roman literary references to high carbon Indian steel since the time of Alexander’s India campaign. The crucible steel production process started in the 6th century BC, at production sites of Kodumanal in Tamil Nadu, Golconda in Telangana, Karnataka and Sri Lanka and exported globally; the Tamils of the Chera Dynasty (Kerala) producing what was termed the finest steel in the world, i.e. Seric Iron to the Romans, Egyptians, Chinese and Arabs by 500 BC. The steel was exported as cakes of steely iron that came to be known as “Wootz”. Wootz steel in India had high amount of carbon in it.
The Chinese and locals in Sri Lanka adopted the production methods of creating wootz steel from the Chera Tamils by the 5th century BC. In Sri Lanka, this early steel-making method employed a unique wind furnace, driven by the monsoon winds. Production sites from antiquity have emerged, in places such as Anuradhapura, Tissamaharama and Samanalawewa,