Solid fat index

Solid fat index

Solid fat index (SFI) is a measure of the percentage of fat in crystalline (solid) phase to total fat (the remainder being in liquid phase) across a temperature gradient. The SFI of a fat is measured using a dilatometer that measures the expansion of a fat as it is heated; density measurements are taken at a series of standardized temperature check points. The resulting SFI/temperature curve is related to melting qualities and flavor. For example, butter has a sharp SFI curve, indicating that it melts quickly and that it releases flavor quickly. [ [http://www.wisdairy.com/OtherDairyProductInfo/Butter/ButterBasics/Characteristics.aspx Physical and Chemical Characteristics ] ] [ [http://webexhibits.org/butter/glossary-sz.html Butter : Glossary: S - Z ] ]

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