Turkish Thompson Raisins are very popular in world markets with it’s similar taste and odour to Californian style although it’s reasonable prices.
Raisins are usually mistaken for being a different variety to Sultanas. Although raisins are thought to come from darker berries, they are actually exactly the same variety.
The reason why they are darker, is because they are not treated with Potassium Carbonate and olive oil solution – hence the drying time is longer than Sultanas. As they stay longer under the sun, they become darker in colour.