In 1852 Haktor Thorsen erected two large warehouses on one of his farms in Sunde and started trading and salting herring. This was the start of an industrial adventure that made Sunde into one of the first industrial communities in Kvinnherad.
Alvøen is one of the oldest industrial places in Norway. As early as the 1620s a gunpowder mill was built here. The place itself was well situated for industrial activity, lying only 100 m from the waterfall, which provided power for the mill, and a good harbour wherefrom the products were shipped. The success of the gun-powder mill varied in the 1600s and 1700s, but what made Alvøen best known was its paper production.