Another of George Wilson's innovations allowed "Price's" to exploit a second overlooked tropical product. Palm oil, extracted from the palm nut was harvested and processed in West Africa. Soap makers were already using the oil but its dark orange-brown colour made it unattractive for candle-making. George devised a process for cleaning palm oil with sulfuric acid and a new cheap source of fat was available. There was an additional advantage to using palm oil. The region that produced the oil - the present day Ghana, Nigeria and Togo – was also the centre of the African slave trade. Slavery had been abolished in Britain and its colonies by 1833, but a huge and lucrative market for African slaves continued in the United States, Brazil and Arabia. Palm oil provided an economic alternative to that slave trade and was actively encouraged by the British government. Slavery had become immensely unpopular in Britain and 'politically correct' products like "Price's" palm oil candles and non-slave produced sugar were very popular. In 1847, when "Edward Price and Co" became "Price's Patent Candle", the new joint stock company considered its ethical use of palm oil so significant that it became the basis for the company's seal which depicted Africans bringing calabashes of palm oil to a seated Britannia figure under a palm tree.