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The history of Lipstick
Women have been painting their lips for thousands of years, even the Egyptian queen Nefertiti, like other women of her time (around 1350 BC), enhanced her lips with a vermilion-colored paste made of crushed beetles. However, the tube-shaped lipstick we know today wasn't introduced until 1883 and years later, thanks to the promotion of silent movie stars, it began to increase its popularity; finally becoming what it is today: one of the bestselling cosmetic products worldwide.
Importance of the Slip Melting Point of lipstick
Lipstick is a complex mixture of dozens of chemical compounds, wax being its primary ingredient. Because lipstick is the only cosmetic product which is ingested, strict regulations are imposed on ingredients and the manufacturing process. Quality control procedures for lipstick must meet official food and drug regulations.
The Slip Melting Point is ideal to characterize complex mixtures like lipstick. The Slip Melting Point method performed with METTLER TOLEDO's Excellence Melting Points Systems MP55 and MP80 is fully compliant with AOCS Cc 3-25.
Slip Melting Point measurement principle
METTLER TOLEDO's Excellence MP Systems allow cosmetics manufacturers to automatically determine the slip melting point. This is done by placing the lipstick sample in a glass capillary and then immersing it in a temperature-controlled water bath. The slip melting point is the temperature at which the column in the capillary begins to rise.
With this application note, you will learn how to determine the slip melting point of lipstick according AOCS Cc 3-25 properly using METTLER TOLEDO’s Melting Point Systems MP55 and MP80.
