Each year, Hadeland melts about 25 tonnes (27.5 tons) of raw materials to make glass. Every afternoon, workers load the raw materials into special pots that get placed into a furnace and heated to around 1400° C (2552° F), until the glass is white hot. By morning, when the glass has reached the consistency of honey, the temperature is reduced to 1140° C (2084° F) — the ideal temp for blowing glass.