the brewhouse another building was built to house a fermentation basement and a cool ship. Electricity and steam were introduced industrializing the brewing process. In 1905 an electrical cooling machine was acquired which industrialized the cooling of the wort and the fermenting of the beer. Before the cooling machine was taken into operation ice from frozen lakes was utilized for cooling. New owner In 1920 Anders Krönlein took over the stock majority of the company, effectively becoming the new owner. Extensive modernizations of the brewing process were made. New open fermentation tanks were purchased. They were made of aluminium and now there was no need to take out the wooden vats once a year to rosin them, which cost time and effort. The open fermentation tanks are still in use. During the 1920s and 1930s machines gradually took over hard manual work like tapping, corking and labelling. During the 1930s and 1940s only beer of 2.8% alcohol by volume had been brewed - pilsner. Krönleins was the first to produce a high grade strong beer in the beginning of the 1950s. The beer was given the name Three Hearts Export. The strong beer was made solely for export, since beer of this strength was prohibited in Sweden at the time. Bottle caps became lucky-buttons in Africa Three Hearts Export was shipped by ocean and exported all the way to the United States with a shipping company called Broströms Tenderservice. Krönlein also managed to sell his beer to Africa. The natives of Côte d'Ivoire became delighted with the bottle caps with the three hearts printed on them and sewed them onto their clothes as lucky buttons. The buttons were believed to protect from evil spirits. The selling of strong beer became allowed in Sweden in 1955 and Three Hearts Export was soon one of the most sold brands of strong beers. Today Three Hearts Export is still around with almost the same styling of the bottle. Shortly before the next achievement, Anders Krönlein handed over to his son Hans. Hans Krönlein had studied at the most famous brewing school in Weihenstephan, Germany and holds a Diploma in Brewing. He first started as brewer in 1952 and fully succeeded his father in 1960. The next success came in 1965 when the so-called "mellanöl", or medium alcohol beer, was introduced in Sweden. The beer contained less alcohol than strong beer and could be