The main ingredient of paraffin is slack wax. This product can have different percentages of oil and its quality will depending on the amount of oil in it.
In general, paraffin is divided into two categories. The first category is macrocrystalline or light and the second category is microcrystalline or heavy. Macrocrystals are also called crystal paraffin, which is less used than the second group, or heavy paraffin.