The one from Sunny Isle would be the one that contains the most ashes, as its name suggests. It is thick and rich to improve the effectiveness of your hair and skin. Jamaican black castor oil is processed in the traditional way. They are roasted and ground by a manual grinder, then the crushed beans are cooked to extract the 100% pure dark brown oil. Compared to other brands, this is the darkest Jamaican black castor oil because Sunny Isle roasts its beans longer, creating more ash in its oil than other oils on the market. believes that a higher ash content increases the efficiency of the oil.