Final answer:
There are different ways to refine hair such as chemical methods, thermal means, and depilation. These methods involve using chemicals, heat, or removing the hair above the surface of the skin. In terms of hair care, treatments can be done to remove impurities and combine fractions to create desired products.
Step-by-step explanation:
There are different ways to refine hair. One way is through chemical methods such as perms, which involve applying chemicals to the hair to create different hairstyles. Chemical straightening or relaxing can also be done to flatten the hair. Another method is thermal means, which involves using heat to change the shape of the hair, such as using a curling iron or straightener.
Additionally, depilation is a way to remove the hair above the surface of the skin. This can be done through shaving, trimming, or using chemical depilatories that break the bonds in the hair.
In terms of hair care, various treatments can be done to refine the hair. Impurities like sulfur and nitrogen can be removed through the refining process. Refineries also combine different fractions of the hair to create products like gasoline, lubricating oil, and heating oil.