Table 5.

The evaluation of egg yolk oil.

Preparation Methods	Evaluation Item
	Oil Yield Rate	Efficacy for Skin Damage	Efficacy for Swell	Efficacy for Thymus	Economy and Safety Level	Color	Smell
Dry distillation method	++	+++	+++	+	++	Black Brown	Disgusting smell
Baking method	+++	++	+++	++	++	Black Brown	Disgusting smell
Reduced pressure distillation	+	−	−−	+++	+	Brown	Disgusting smell
Ether extraction method	++	+++	+	++	−	Orange	Slight egg fragrance
Ethanol extraction method	+++	+++	+++	+++	+++	Orange	Strong egg fragrance
Petroleum ether extraction method	+++	+++	−	+	++	Orange	Slight egg
Chloroform extraction method	+++	+++	−	+++	−	Orange	Slight egg

Note: the + represented a good performance and the – represented a bad one.