To make them look white.
powdered wig
Wigs that have a white powder on them. Washington is often pictured with one. His true hair color was red.
they did cause they did not have good quality back then
There is no specific collective noun for wigs. However, collective nouns are an informal part of language. Any noun suitable for the situation can be used. Example suggestions are:a collection of wigsa wardrobe of wigsa mop of wigsa frizz of wigsa wisp of wigsa dusting of wigs (powdered)a bundle of wigs
They used the powder to get a white or off white color. Later they had developed ways of getting white wigs. The was a tax on wig powder that ended the style. Men shaved their heads and were powdered wigs because of lice, fleas, bedbugs etc...
to make it white or gray
The powder used by America's founding fathers to keep their wigs white was made from finely ground starch or occasionally white flour. This powder was called "powdered wig powder" or simply "hair powder." It was applied to the wigs using a special device called a powder puff.
Of old: powdered wigs and hoop skirts. More recently: miniskirts.
Wigs were an outward manifestation of social status. Wigmakers held important positions in society. Elaborate powdered wigs were the fashion in the 18th century. By the end of the century, however, many young men and women were powdering their own hair instead of buying wigs.
It was not uncommon for men to wear powdered wigs in the 1700s/early 1800s.
as you can see the roman houses were used the make food and fake wigs!