Chemistry - cosmetics- making of cold cream

Cold Cream a oil-in-water emulsion
13 g beeswax 45 mL liquid paraffin 1 g borax 17 mL rosewater Bunsen burner tripod gloves gauze mat 2 X 250 mL beakers glass rod scales heat proof mat
Measure 13 g of beeswax into a beaker.
Measure 45 mL of liquid paraffin and pour into the beaker with the beeswax.
Heat until the wax melts and leave to cool on the heat proof mat.
In the other beaker place 1 g of borax and 17 mL rosewater and heat until the borax dissolves.
When this has cooled pour the contents of this beaker into the beaker contaning the beeswax and liquid paraffin. Add 3 or 4 drops of perfume and stir. Place the cold cream into a jar.
What is an emulsifier?
How does an emulsifier work?
What is an emulsion?
Water and paraffin oil should not mix. They should separate out into layers. However the cold cream has an even consistency. Explain why.