Have you heard about the salt and pepper shaker movement?
A funny movement you can observe many professional hair dressers with is the salt and pepper shaker movement. We have seen it in many salons and have asked hair dressers why they use their salon hair dryer like a salt and pepper shaker. Most of them don’t even know or just inherited this method from their teachers. But here are some good reasons, why hair dressers should stop shaking their hair dryer:
- there won’t come out any salt or pepper, just air ?hair has a thin protective outer layer of keratin cells called cuticle (https://en.wikipedia.org/wiki/Hair), these cells are shaped like scales that are layered one over the other. They open up when the hair gets wet, so shaking wet hair and the airflow of the hair dryer makes the hair climb up on each other and you end up with frizzy and dull hair
- the hydrogen and sulphur bonds in hair easily dissolve in water and the shape into which the hair dries will last until you wash it again or apply strong heat on it (what is absolutely not recommended, as strong heat on a raised cuticle will cause permanent damage)
this movement causes unnecessary strain on the hand, wrist and upper arm and may be harmful over time
- professional salon hair dryers are not designed for constant shaking, but maracas are…
it is uncomfortable for the customer and he may end up with the impression that you don’t have enough time to dry his hair properly
you have no control over the airflow and how it hits the hair, whether it blows with or against the direction of the cuticle
this method creates a bad basis that makes it difficult achieve a perfect blow dry hairstyle
Some hairdressers shake the hair dryer because they don’t want to burn the hair, but…
…let’s have a look at air and heat in professional hair dryers:
The temperature of the airflow in professional hair dryers is defined by the producer for the different settings of the hair dryer. Without the nozzle, most salon hair dryers will blow heat at the outer edge of the airflow and the air in the middle of the airflow will be colder. Therefore, you may experience “heating rings” in the hair length if you blow too long on one point of the hair without a nozzle. Our engineers designed Dual Air with an even heat distribution over the entire airflow, even without the nozzle.
Many believe that the number of watts determine whether a professional hair dryer blows dry hair quickly or not. That is a false fact, because there is an optimal level for drying hair.
The velocity of drying hair is influenced by two factors:
the drying power of the air, which means low humidity in the airflow and
the speed of the airflow.
Both factors reach a point where the drying rate can’t increase any further. Regarding the drying power that comes out of a hair dryer -even in a steamy bathroom-, the humidity rate is below 4% when the air reaches a temperature of 80 degrees Celsius. A further increase in temperature has no effect on the actual drying rate. Similar principle also applies to the air velocity. The important thing is to remove water molecules that lie in the inner air layer between the hair strands. This is done by creating turbulences in the air around each hair strand. An adequate amount of air out of the hair dryer makes the hair flutter and creates enough turbulence to remove the water. Even a hurricane in a box won’t accelerate the drying rate. Dual Air for example uses only 1700 watt, but it dries at an optimal level without burning the hair. When blow drying dry hair, the temperature of the hair increases. You have probably experienced the effect, when you have blow dried a lot on one hair panel and as a result the hair seems faint.
Consider the direction of the cuticles under drying hair:
What happens when you take to fishes and rub them against each other in opposite directions? The same what happens to the fish scales will also happen to the hair. The cuticles of the hair are opened when the hair is wet. When shaking on both the hair and the hair dryer, you make small whirlwinds in the hair and the hair strands filter together and begin to climb upwards on each other. When the hair is dry then, the cuticle layers stand upwards and splay, the hair is slightly twisted in each other. When brushing through the hair and using a heat tool or a warm hair dryer and a brush over the hair strands, permanent damage can be done to the hair. Such as split cuticle layers and a dull hair.
So, use salt and pepper shaker movement only at the dinner table…