1、 How effective is a household hair removal device?

To clarify this issue, it may be necessary to first investigate the structure of the skin and hair follicles.

The hair we commonly refer to is actually the part that grows outside the skin, commonly known as the hair shaft. Traditional hair removal methods such as shavers and hair removal creams actually remove the hair from the hair shaft and do not affect the continued growth of hair follicles. Therefore, after a few days, the part below the skin will continue to grow and become a new hair shaft, which needs to be depilated again.

The growth of hair depends on a special structure at the end of the hair follicle, which contains a large number of hair mother cells. The continuous division and reproduction of hair mother cells make hair follicle metabolism extremely active, and hair continues to grow.

The working principle of hair removal equipment in household or beauty salons is to disrupt the activity of hair cells through the "selective photothermal effect" of photons, thereby stopping hair follicle growth.

It is the use of light to penetrate the skin, and the hair follicles, as the part of the skin where the most melanin is deposited, absorb the most light energy and convert it into heat energy, forming a higher temperature near the hair follicles, causing the inactivation of hair cells.

The hair removal device actually targets the source of hair - hair mother cells - to stop hair follicles from growing.

The principle of using a home hair removal device and a beauty salon hair removal device on hair is the same, but the beauty salon hair removal device uses a single wavelength laser, while the home hair removal device uses IPL strong pulse light. what

The main difference between the two is that laser hair removal has higher and more concentrated energy at a single wavelength, which efficiently destroys hair follicle activity. However, the pain is too high and the price of the instrument is extremely high; IPL strong pulse light is a broad spectrum light composed of multiple wavelengths of light. Although it is not as efficient as laser, it can achieve similar hair removal effects after multiple uses, and is safer and less painful, making it suitable for household use.

Home hair removal equipment is currently the most effective, safe, experiential, and cost-effective hair removal method.

A family, the most important thing is to keep everything neat and tidy.

I would like to know how to choose a hair removal machine. Here are the next selection principles.

Shenzhen Hair Removal Instrument OEM Factory controls half of the production of hair removal instruments both domestically and internationally.

Large filter coating machine

In terms of technical dimensions, the most important factors that affect the hair removal effect of hair removal devices are pulse width and energy density, followed by wavelength. However, there is almost no difference in pulse width between household hair removal devices, and everyone is the same. Therefore, this discussion has no significance.

So how to choose a hair removal device, energy density and wavelength are the most important!

Energy Density

When choosing a hair removal device, first look at the energy density, and at least choose 5J/cm² Above.

The greater the energy, the better the effect. This is easy to understand, but there is also a pitfall here. Some businesses will directly promote the hair removal effect based on the total energy, while the actual one that can explain the hair removal effect is the energy density, which is equal to the total energy/light outlet area.

Authoritative papers point out that the energy density of IPL strong pulsed light must reach at least 5J/cm²， To trigger tissue changes in hair follicles and achieve effective hair removal.

So hair removal machines that do not explicitly provide energy density are all playing hooligans. Of course, the higher the energy density, the better. However, don't blindly pursue too high energy. It's almost enough, because hair removal machines with high energy density are expensive.

Wavelength

The longer the wavelength, the more painless and effective it is. A hair removal device with a starting wavelength exceeding 620nm and a clear red filter will have a better user experience.

The filter with a starting wavelength of 630nm is clearly red when viewed with the naked eye.

The light from the hair removal device is actually absorbed by the skin, forming heat energy that causes pain and skin thermal damage. The IPL used in household hair removal devices is a broad spectrum light, composed of many different wavelengths of light. The shorter the wavelength, the more easily absorbed by the skin, while the longer the wavelength, the stronger the penetration force and less easily absorbed by the skin. Especially for Asians with darker skin tones, long light waves with a red-orange color above 600nm in the spectrum can avoid pain and thermal damage during hair removal, and more effectively reach the root of hair follicles.

Red light appears in the spectrum above 620nm, resulting in better hair removal effect and avoiding pain and heat damage.

The FDA standard in the United States is that hair removal devices cannot use light with wavelengths below 500nm, as light below 500nm can easily cause adverse reactions to the skin and be harmful to human health. A few hundred yuan cheap hair removal device, due to cost reasons, mostly uses inferior filters that cannot effectively filter light below 500nm, causing invisible damage to the skin.

Usability

A hair removal device with gear set according to body parts is more effective.

Generally, hair removal machines have many gear options to choose from, and it seems that the brand is unaware of how painful it is for us to have difficulty choosing. These gears are mostly used to adjust energy levels. As we mentioned earlier, the higher the energy, the more effective it is. So why do we have to do so many confusing operations with these gears?

Due to different body parts and varying skin tones, targeted hair removal with different energy densities is necessary, otherwise it can be very painful and prone to skin damage.

Adjusting the gear of the skin color card is a solution, but the difference in overall skin color for most people is not significant, and the significance of gear guidance is not significant.

It is best to choose a hair removal device with gear settings for different body parts, as it saves a lot of exploration costs when using it (you may not understand the pain of using the lowest gear to remove hands and feet for over a month).

For example (but not recommended, the touch is not sensitive at all)

Another easily overlooked aspect is weight, so try to choose a handle with a lighter weight.

Nowadays, many hair removal machines integrate the main unit into the light output handle, and the more integrated form is essentially more portable. But unlike other appliances, hair removal devices require a considerable amount of power to achieve effective hair removal energy density, so the circuit structure determines that the volume and weight cannot be reduced. The result of integration is that users have to hold a one kilogram handle on their body for a long time, thinking about shedding hair can be very tiring.

Thunder Hammer, I don't know if you can lift it, but I can't lift it anyway.

Try to choose a split type, with a light output handle as much as possible to make it easier to use.

Below is a guide to avoiding pitfalls for hair removal machines.

Do not blindly worship imported brands.

After a visit and investigation, it is not surprising that most hair removal machine brands, both domestic and foreign, are made in China, and making in China has never disappointed people. So there is no need to superstition foreign brands, after all, the industrial chain has formed, and the products produced by domestic brands are no longer much different from international brands. On the contrary, domestic brands, due to their faster research and development feedback, faster application of new technologies, and more humanized adjustments in functions based on the characteristics of Chinese people, tend to surpass foreign brands in terms of user experience, which is somewhat similar to the mobile phone industry.

The skin detection function is very good, but it is not effective for us.

The skin detection function is a function that adjusts energy levels based on the depth of skin color. For situations where there is a huge difference in skin color between white and black people in Europe and America, it is a very user-friendly function. But the vast majority of Asians' overall skin color is concentrated in the type III skin color of the skin color card, which detects all parts of the body of yellow people and can only provide the same energy level.

Only a very small number of yellow people with very dark skin have a type IV skin tone, while the majority of people have a type III overall skin tone

The principle of freezing point (ice sensation) hair removal is its practical use of ice compress to reduce the burning pain caused by lighting and play a calming role.

Ice sensation hair removal was born from a professional laser hair removal machine, because laser hair removal is really painful, so the existence of ice sensation is too necessary. However, the ice sensation of household hair removal devices is actually just a mockery. Due to volume limitations, household hair removal devices generally have ice at the beginning. However, after a few minutes of use, due to the body's heat transfer to the ice sensitive head, the temperature of the ice sensitive head rises to or even exceeds room temperature, and the effect of ice application has been completely lost.

The temperature of the ice sensitive hair removal head after a few minutes of using the mainstream ice sensitive hair removal device on the market, including ELLKII and Guanzhou, has even reached the level of scalding.

The best way to avoid pain is to go back to the wavelength and choose a hair removal device with a starting wavelength of 620nm, which is painless and safe.

Light with wavelengths below 500nm is not filtered, and the ultraviolet rays are the first culprit in skin aging and skin cancer.

In fact, the mainstream products in the market have done quite well, and many other articles have been written about the recommended products. According to the products we saw in our previous research, Philips BRI864, Annie the kitten's horn, and Cosbeauty CB-027 are all good products in more than 1000 regions.

At present, several mainstream brands, such as Ulike, Mujin, Philips, Braun, Kitty Anne, and JOVS, are still masters in marketing.

In fact, most of the products on the market have been tested internally. Due to space limitations, let's focus on the few that are more interesting to everyone in the comments.

Ulike

At present, Sapphire AIR+is the best-selling hair removal device in the industry. It is a popular and popular social media product on social media platforms such as Xiaohongshu. Although Ulike values marketing more than products, over the years, it has accumulated a certain amount of technology.

The page does not indicate energy density, but the actual measurement is 4.96 J/cm ²， Near 5J/cm ² The hair removal effect is basically guaranteed.

Energy density=total energy 16.40J/light outlet area 3.3cm²= 4.96J/cm²

Although the initial wavelength of 510nm is not ideal, it is at least within the safe range, and the two main parameters of energy density and wavelength seem acceptable.

What's more frustrating is its flagship sapphire freezing point.

As mentioned earlier, the freezing point actually plays a role in reducing pain through ice application, but after being exposed to light for a period of time, the temperature in the icy area of ulike has already risen to over 40 degrees. Not to mention ice application, it can be used as a warm baby.

Although the ice feeling is not very useful, the ulike Sapphire AIR+is actually passable in all aspects. The appearance is quite fresh, not as old-fashioned as Mujin or as ordinary as Philips. The 278g weight of the light emitting handle is moderate, but after holding it for a long time, it still feels a bit heavy, and the whole body is not lost.

But at a price of 1800, the energy density is also close to 5J/cm ²， The starting wavelength is only 510nm, which has a hint of low configuration and high price.

Kitty Annie

Some people say that their designs understand women very well, indeed. The first hair removal device with a small green box is very stunning, and the configuration is directly full, but the price is... please feel free.

I will mainly talk about the following little cow horn. Its bright yellow color and asymmetrical shape make it look completely different from other hair removal devices, without the cold feeling of ordinary beauty instruments.

The data of energy density and wavelength are relatively ideal, so it is estimated that there is no space for fancy functions such as ice sensation and skin detection. Overall, it feels a bit like an enhanced version of Philips BRI8161

The actual hair removal effect is currently very good among over a thousand levels, even better than many big brands with over two thousand.

Light outlet area 3cm²， The measured total energy is 16J, with an energy density of 5.3J/cm²

The light emitting handle is about as heavy as the iPhone 12, and it belongs to the category that won't get tired after being held for a long time; The gear positions distinguished by body parts are very intuitive and close to the actual usage needs of girls (such as the manual, which I never read anyway).

To put it in perspective, although yellow is quite cute, not every girl likes this style and color. There is also the warm and painless black technology mentioned on the page, but when opened, there is no new technology found. In my understanding, the wavelength is actually long enough, so as long as your skin is not very black, it should be painless. When measured, it is indeed warm and hot without pain, but it has nothing to do with black technology.

The starting wavelength is 630nm, and the filter appears red. The reason why the calf horn is not painful is actually because of this.

Summary: The comprehensive performance of this kitten Annie calf horn hair removal device is quite excellent, and it is worth recommending in the price range of 1000 yuan.

Philips

International brands won't be introduced much, but the focus will be on the most cost-effective BRI861.

Although the energy density and wavelength are only up to standard, at first glance at the price, it is truly fragrant~and there is also a halo of support from major brands, which is highly cost-effective. What I should pay attention to here is the difference between the BRI861 and BRI864 models. They look exactly the same. I was confused at first.

Remember to choose BRI861 Remember to choose BRI861 Remember to choose BRI861

BRI861 can still cause significant pain in sensitive areas such as the armpit, as the wavelength is just above the passing line and not much. If budget allows and you only want a large brand, you can consider SC1999, which has a 600nm wavelength replacement head that can be used to remove sensitive areas for a better experience.

JOVS

It is said that he is a boss who has made a lot of money in the financial industry and has also taken great advantage of the huge potential of the hair removal machine market. He wasted half of his fortune and made a comeback. In just one year, he occupied an important position in the hair removal machine industry. JOVS' Venus is a popular hair removal device this year, winning the Red Dot Design Award. I feel like I can see his presence at various design exhibitions.

The energy and wavelength data are both very good, and there are specialized gears for different parts, so the hair removal effect should be not bad. Why isn't it strongly recommended?

The main problem lies in the main features. The 6 models paired with 6 care heads should be able to achieve more accurate matching of hair removal needs for different parts. However, the original filter of the body is 590nm, and light below 590nm has been completely filtered out. However, the added care head filter is lower than 590nm, which is a pure marketing gimmick that charges intelligence tax. Personally, I dislike this behavior.

The SR skin rejuvenation model it focuses on is also a puzzle for me, because as long as it is IPL strong pulse light, it has the skin rejuvenation function of stimulating collagen regeneration and eliminating melanin. I tested the SR rejuvenation mode of JOVS hair removal device, which means the energy is adjusted relatively low and there are no other special features.

There is also the weight issue mentioned earlier. Yes, it is the Hammer of the Thunder God. It weighs one kilogram and can be held by a fairy with slender hands for more than ten minutes. Please, not everyone is a Thunder God, and it is easy to avoid hair removal due to tired hands. This Venus is like a boastful boy, with all kinds of new concepts and gimmicks that are very scary, but when girls actually use it... sure enough, the man's mouth is a deceiving ghost.

Smoothskin

The veteran brand of hair removal equipment has become popular in the past two years, especially after frequent appearances in celebrity live streaming rooms. The ability to tell stories is really strong, such as the Queen of England Award, 41 years of research and development history, and unlimited flashes. Philips, who is equally experienced in hair removal equipment, is completely incomparable in this regard. But qualifications do not represent everything, at least for the Chinese market, Mujin's product strength has clearly fallen behind.

Their key promotion is the 115 flash per minute ultra fast flash. After using it for a few minutes, the temperature of the bald head reached a terrifying 81 ℃.

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