Hair is composed of 50.65% carbon, 20.85% oxygen, 17.14% nitrogen, 6.36% hydrogen, and 5.0% sulfur. Hair also contains trace amounts of magnesium, arsenic, iron, chromium and other metals and minerals.
Darker hair contains higher levels of carbon than blonde hair.
The fine, downy hair that covers the cheeks and other parts of the face is called lanugo hair.
Hair grows approximately one-half inch per month. Hair growth occurs fastest between the ages of 15 and 30, and grows faster on women than men.
The average life span of a strand of hair is between 4 and 7 years.
Hair's natural part is caused by the condition known as a hairstream. Hairstream refers to the effect that is created when the hair follicles slope in the same direction, thereby determining the directional flow of the hair. When two hairstreams slope in opposite directions, a natural part occurs. In other words, hair follicles on one side of the part slope differently than the follicles on the other side of the part.
Hair is shed on a daily basis. It is normal to shed between 75-150 hairs per day.
The numbers of hairs on the head vary with the hair's natural color. Redheads have about 90,000. Black, 108,000. Brown, 140,000. And blondes not only have more fun, they have more hair too. They have about 140,000.
There is an average of 1,000 hairs per square inch. I guess that means the bigger your head is, the more hair you have.
Normally, dry hair can be stretched one-fifth of it's length before breaking. Wet hair can stretch between 40-50% of it's length.
The curling iron was developed in 1875 by a Frenchman, Marcel Grateau. Not to be confused with Marcel Marceau, the famous mime.
The level system of haircolor, which is a 1-10 scale used to measure darkness (level 1 is black, level 10 is light blonde), was originally developed by law enforcement officials as a means to identify suspected criminals.
The removal of unwanted body hair can be dated back to the time of the ancient Egyptians, who used abrasion as a way to remove hair. Ancient Romans and Greeks used pumice stones and other abrasives to remove hair. Native Americans and Pacific Islanders removed hair by scraping with seashells. In ancient Mayan and Aztec cultures, the volcanic glass obsidian was used to shave hair. Obsidian can be honed many times sharper than most razor blades.
Darker hair contains higher levels of carbon than blonde hair.
The fine, downy hair that covers the cheeks and other parts of the face is called lanugo hair.
Hair grows approximately one-half inch per month. Hair growth occurs fastest between the ages of 15 and 30, and grows faster on women than men.
The average life span of a strand of hair is between 4 and 7 years.
Hair's natural part is caused by the condition known as a hairstream. Hairstream refers to the effect that is created when the hair follicles slope in the same direction, thereby determining the directional flow of the hair. When two hairstreams slope in opposite directions, a natural part occurs. In other words, hair follicles on one side of the part slope differently than the follicles on the other side of the part.
Hair is shed on a daily basis. It is normal to shed between 75-150 hairs per day.
The numbers of hairs on the head vary with the hair's natural color. Redheads have about 90,000. Black, 108,000. Brown, 140,000. And blondes not only have more fun, they have more hair too. They have about 140,000.
There is an average of 1,000 hairs per square inch. I guess that means the bigger your head is, the more hair you have.
Normally, dry hair can be stretched one-fifth of it's length before breaking. Wet hair can stretch between 40-50% of it's length.
The curling iron was developed in 1875 by a Frenchman, Marcel Grateau. Not to be confused with Marcel Marceau, the famous mime.
The level system of haircolor, which is a 1-10 scale used to measure darkness (level 1 is black, level 10 is light blonde), was originally developed by law enforcement officials as a means to identify suspected criminals.
The removal of unwanted body hair can be dated back to the time of the ancient Egyptians, who used abrasion as a way to remove hair. Ancient Romans and Greeks used pumice stones and other abrasives to remove hair. Native Americans and Pacific Islanders removed hair by scraping with seashells. In ancient Mayan and Aztec cultures, the volcanic glass obsidian was used to shave hair. Obsidian can be honed many times sharper than most razor blades.
The earliest means of chemical hair removal dates back to the ancient Turks, who used a concoction known as "rusma". Rusma is a combination of yellow sulfide of arsenic, quicklime, and rose water.
Electrolysis was invented by Charles E. Michel, a St. Louis opthalmologist in 1875. Dr. Michel used galvanic current and a surgical needle in his device, which was developed to treat ingrown eyelashes.
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