Used Cooking Oil (UCO): Used cooking oil is waste or spent cooking & frying oils collected from commercial food factories, restaurants, arena's, casinos, schools, bakeries, etc. While the majority of used cooking oils are vegetable based, by no means should UCO be considered "waste vegetable oil" as there is inevitably some level of animla fat in UCO, which is naturally derived from the cooking process, and of course some resteraunts cook in fats rather than oils. Generally UCO should not be considererd yellow grease as it may not be fully rendered or meet the specification commonly associated with yellow grease.
Type 1
FFA (Free Fatty Acid) : 5% max
M.I.U. (Moisture and Impurities) : 2% max
Saponification : 185-200 mg KOH/g
Iodine Value : 75-100
Titre C (melting point) : 23-28 C min
Type 2
Free fatty acids: 3.75 %
M.I.U ( Moisture and Impurities): 0.02 %
Saponification value: 186
Iodine value: 120
Titre C (melting point): 13.75" C