Kalwa produces both semi-flexible glass panes as well as glass lenses and sheets of glass. Thanks to volcanic sands and the abundance of iron ores the Tagatans have discovered how to create sheets of glass by rolling it out between hot iron or steel bars.

Kalawa has developed forges and smelters powered by the intense trade winds that surround the islands, this allows for the smelting of steel as well as the large scale production of metals such as bronze, cast and wrought iron, as well as a reliable ability to produce high-quality steel.