Uses
Combs can be used for many purposes. Historically, their main purpose was, perhaps, delousing. Other uses include: securing long hair in place; decorating the hair; matting sections of hair for dreadlocking; or keeping a kippah or skullcap in place. In Spain, a peineta is a large decorative comb to keep a mantilla in place.
In industry and craft, combs are used in separating cotton fibres from seeds and other debris (the cotton gin, a mechanized version of the comb, is one of the machines that ushered the Industrial Revolution). A comb is used to distribute colours in paper marbling to make the swirling colour patterns in comb-marbled paper.
Combs are also a favorite spot for police investigators to collect hair and dandruff samples that can be used in ascertaining dead or living persons' identities, as well as their state of health, toxicological profiles, and so forth.
Read more about this topic: Comb