 As soon as export could be taken up again, demand for iron, copper, and tar remained constantly high.At the same time, domestic shipping was promoted by lighter custom duties and by a mercantile act introduced in 1724 which limited goods imported by foreign ships to import goods originating from the ship's native country.There was, however, a lack of domestic capital; a shortage solved by cash input from foreign trade houses and wholesale companies in Stockholm and Gothenburg.