The perfect fragrance for my spa area

The perfect fragrance for my spa area

How a fragrance develops depends on many factors: The ambient temperature, humidity, whether the fragrance was made for water or air, and other components. For example, many change in heat or can no longer be perceived at all. This is not the case with our fragrances, because in order to ensure that our fragrances remain stable and have an optimal course, they are already precisely adjusted to the respective application environment in our company during production. Which fragrance fits perfectly in which spa area can be seen in the following matrix:

Application Area Aromee
basic
Aromee
intense
Aromee
Sauna
intense
Aromee
Whirl
intense
Aroma
Bath
Adventure shower, experience shower,
feature shower, shower
X X      
Bio sauna, soft sauna, Sanarium X X      
Cleopatra bath       X  
Fresh water whirlpool bath         X
Hamam X X      
Hot-tub       X  
Jacuzzi       X  
Rhasoul, Rasul (mud bath) X X      
Room air aromatization   X      
Sauna, Finnish sauna, dry sauna X X X    
Salt inhalation X X      
Steam bath, aroma bath, wet sauna X X      
Tepidarium X X      
Whirlpool       X  

Our social responsibility

Our social responsibility

There are good reasons why we have chosen Germany as our location, with all the consequences that this entails.

Firstly, of course, because we focus exclusively on the highest quality. And we can only guarantee them if we also have a very precise overview of the complete production process and the procurement of raw materials and components. The final quality inspection is also carried out in our company by experienced and highly qualified employees.

On the second hand, this is the only place where we can really influence the working conditions of our employees. Therefore, we have always refused to outsource to low-wage countries. In our company, all employees are employed here in Germany on a permanent basis with the usual social security benefits. We also offer flexible and family-friendly working time models. After all, this is our understanding of a modern and progressive working environment, which our employees obviously appreciate because our staff turnover is extremely low.

This self-image also includes the fact that we do not import any prefabricated parts from low-wage countries. Our technology is manufactured in Wendlingen from individual parts. Even our circuit boards are produced by us here on site and not imported as cheap goods, which were fabricated without social responsibility. This is the only way we can maintain our consistently high quality standards and at the same time ensure that this is done in a humane environment with social security. Our fragrance compositions as well as our cosmetics and care cleansers/disinfectants are also manufactured and bottled in our factory under these conditions.
In return, our employees receive an adequate salary combined with the appreciation they deserve, which we can only give when we see the work come to life before our eyes.

Maybe this is the reason why practically all of our employees have been with us for so long?


Fragrances in the steam shower? Sure!

Fragrances in the steam shower? Sure!

Can everyday steam showers also be scented with our Kemitron Aromee fragrances? In the end, we get this question frequently.

Of course it is possible!

Especially because the desire for relaxation and recreation is constantly growing, even in one’s own home, more and more people are opting for their own steam shower. And that’s quite clear, because in no time at all, the bathroom at home can be transformed into a personal wellness oasis. And that in the smallest of spaces!

In this case, we recommend our Aromee intense fragrances, for which we have a wide portfolio of different fragrances ready for you. Do you prefer a citrus fragrance or rather floral, tangy or herbaceous, fresh or sweet? We cannot make this decision for you. However, it is important that you get fragrances that remain stable at any temperature and provide you with constant delicate intensity on your way to relaxation. In addition, the fragrances should not cause discoloration in the shower and their nozzles should not get clogged. With our Aromee intense products, nothing of the sort will happen and you can rely on consistently high quality! After all, anyone who installs a steam shower wants to have fun with it for a long time.
And we wish you enjoyable and relaxing shower experiences!


"Aufguss is the highlight in large saunas"

"Aufguss is the highlight in large saunas"

An interview with multiple German Aufguss champion Udo Mohr

Aufguss is translated as infusion in English and is a sauna ritual. Water or ice mixed with essential oils is poured onto the hot stones. The resulting steam is waved at the guests through complicated towel movements.

In a traditional sauna, a sauna master is the one who waves the towels and raises the heat. He is also the one responsible for making sure guests feel the experience is special and that they receive the maximum amount of relaxation.

Corona also has the sauna world firmly in its grip. With a three-month break in the summer of 2020, public saunas in Germany have been closed for over a year. We spoke to Mr Mohr, the sauna master of the Waldschwimmbad Neu-Isenburg. Despite the situation, he is cheerfully optimistic and eager for a reopening. Because, he says, “I get so many messages and enquiries about when we’ re going to reopen. In these difficult times, when pressure and stress are on a different level, I want to give our guests at least something.” A people person, you can tell.

Today we asked a little bit more about Aufguss. And we were able to learn from the expert about this topic and a few others:

Hello Mr Mohr, you are a sauna master. At the moment all the public saunas are closed, how are you?

Last year, when the pandemic started, all the saunas were closed, then it went well for another three months, and now everything has been closed again practically since the end of October 2020. We try to make the best of it, like many others.

You are a multiple German Aufguss champion. In other words, you’re a man of the trade. Can you give people a few tips? First of all, what is Aufguss, what do you do it for?

Yes, the Aufguss is the highlight in large saunas, you do it at the end of a sauna session. That is, people sweat and then when the skin is wet, you try with the towel to pull down the so-called adhesive layer* or insulation layer from the body. For this is a very pleasant feeling. Especially if it is not done too forcefully, but delicately. At these temperatures it is pleasant to be touched by a light wind. And visitors just enjoy that.

Does this feel hotter in the moment?

Yes, because it works with a lot of humidity. This is of course due to the heat in the room. Therefore, one is initially hit by a warm sweep. After that, it is still very pleasant. It also always depends on the amount of water that is being worked with. Because some people always think that a lot of water is always good. But I believe that if you can create a lot with little water, it is much more pleasant for guests.

Who taught you how to an Aufguss?

When I started back then, I had very good sauna masters who were already quite far in this area for that time. Naturally, I learned a lot from them. But then I thought that maybe I could improve a bit on what they were showing me. So I always tried to keep working on it. I always practiced in front of the mirror at home. My wife scolded me for raising all the dust from the closet, but that’s how I worked my way in.

Are there actually different techniques?

Yes, of course, there are many techniques. The standard ones. For example, there was a sauna master in South Tyrol who did helicopter waving (the helicopter with the towel over the head). Or there is the pizza waving, which is so very trendy at the moment.

In addition, there are, of course, a lot of Aufguss utensils that are also used. For example, in Erding. Here, they work with the flag in the large sauna. The fan also belongs to it, of course, or a ring. But these are many things that have been copied from the past. For example, Mr. Danter (“Well-being Guide of Europe”) already had a large Frisbee disc back then. It was later adopted by others who still use it today for their Aufguss.

And what do you like to use?

I think I now use everything and change through. After all, it must not become too one-sided. The guests want variety. And I’m sure if we’re allowed to open again, people will come just to enjoy. I think there is a lot of pent-up demand. Commercial saunas are also a meeting point for communication. That’s missing now. Many people always visit on the same days, meet there, know each other and form groups. If private saunas are used, as they are now, then the family is there. That’s something completely different.

Good point, what is it like in a private sauna? Can you also make an Aufguss there?

For personal use, I would probably do less, because private saunas are usually way too small. They often have only 2-3 m². This means that an infusion is certainly made, but the towel for the air movement is omitted. In any case, the heat usually comes down on its own. Because when a ladle is poured on, the heat immediately accumulates. You notice that without having to move the air.

You also have separate men’s or women’s saunas. Do they differ in that respect?

Yes! Women usually don’t like it quite so hot. Of course, there are differences in individual cases. But in principle you can say: women like rituals. For example, with peelings or with singing bowls. Men, on the other hand, like to have a bit of rock music in the background and like it hotter.

We dare a fragrance manufacturer. Is it possible to increase the fragrance sensation in the sauna without increasing the dosage?

Of course! When it comes to dosage, less is often more. If overdosed, it can also be unpleasant or burn the eyes. This should be handled with care. Switching between fragrance concentrates and the oils is also often difficult. I do love the concentrates as well, because one can play with them. For example: A nice mint scent that brings the cooling effect on the skin is something great. But also the classic fragrances, such as lemon balm or citric scents are used constantly. Especially in the commercial sector. When the door is opened and then people stand in front of the sauna and still smell the fragrance, that is already an incentive.

You are a multiple German Aufguss champion. How one become such?

II came to it practically like a virgin to a child. At that time I had just started to perform Aufgüsse (infusions). One of our group said that there was a championship and asked who wanted to participate. Actually, it was just to see how we would do. That was in 2004 in Hannover at the aquaLaatzium. So I went there without any expectations together with a colleague. The competition consisted of three different techniques: the normal Aufguss, the banya sauna (the particularly hot, Russian sauna) thus the birch tassel sauna (Eastern Europe and Russia), plus an Aufguss that could be freely invented. Before the final round, I was in third place. Then all three Aufgüsse were to be worked through again, other characteristics were evaluated. In that round, I slipped from third to first place. That’s how I got my first title. After that, there was no championship for many years. In 2012 and 2014, the “Sauna, Wellness and Health Center” in Erzhausen near Darmstadt hosted the championship, both of which I won. At that time, however, there was not yet as much hype about it as there is at the moment. In the meantime there is a lot of fuss about the championship. Nowadays, more attention is paid to the show than to the health aspect. In my opinion, this aspect has been lost. Because it is only about how the towel is waved, thrown in and caught again. The health effect that sauna brings and that sauna is also for wellbeing and not just for show, that’s no longer a point.

Finally, we would be interested to know: Do you enjoy visiting the sauna to relax?

Yes, of course! If my time permits, I also like to lie down in the sauna for half an hour. Maybe with a good fragrance and some music in the background. I can close my eyes then and enjoy it extensively.

Thank you for the interview, Mr. Mohr!

Udo Mohr has been giving training courses for sauna personnel for 15 years. If you are interested in a contact, we will be happy to arrange it for you. A short letter via our contact form is sufficient.

*Adhesive layer [editor’s note]: The adhesive layer is a thin layer of air that surrounds all stationary or motionless objects. In principle, it serves to insulate the skin. This thin layer of air tears and is whirled away during the so-called Aufguss. This allows the even hotter room air to reach the body and the heat of the steam blast is felt even more intensely.

The same principle (of the whirled away adhesive layer) causes us to perceive cool weather as more uncomfortable when there is wind. This is similar in the sauna, except that the air layer protects the skin from the heat effect of the hot air (convection). Waving a towel intentionally removes it to achieve the above effect.


Perfect after an intense workout: sauna and heat

Perfect after an intense workout: sauna and heat

Many gym-goers or athletes see a visit to the sauna after a workout as mandatory. First and foremost, the stressed muscles should relax faster, muscle regeneration should be initiated and the entire body should be allowed to recover. Because the faster muscles can recover, the faster their performance is restored.

Fitness studios almost always offer a combination of strength training and sauna, and not without reason. Is it therefore advisable to take a sauna immediately after exercise? To answer this question, we should first consider what effect the sauna has on the organism.

The total body temperature of the sauna user increases during sauna. This is called overheating (hyperthermia). This is because we override the body’s own response mechanisms to heat during sauna bathing. Because even though we sweat, there is no evaporation effect in the sauna (due to the high ambient temperature) and therefore no heat release, while heat continues to be constantly supplied to the body over the period of the stay. The temperature of the skin increases from 30-32°C to approx. 40-42°C, while the heat in the body core increases by approx. 2°C (Weineck 2010, 795). This reverses the relationship of the temperature of the body core to the skin, because otherwise the skin is always cooler than the core. Increasing the core body temperature in this way raises metabolic activity to such an extent that total energy expenditure increases by up to 40%. This effect is best observed in the skin cells, because cell renewal is running at full speed there (Fritzsche/Fritzsche 1975, 15; Weineck 2010, 795).

This is also supported by a study from the American Council on Exercise (Iwen et al. (2019) Int J Res Ex Phys. 15(1):1-12). Staying warm after exercise can enhance this effect.

The researchers tested three groups – a control group, one that spent 30 minutes in hot water, and another in which participants wore a sauna suit after exercise.

Both passive warming strategies were equally sufficient to increase core temperatures, and both remained below temperatures (39°C, 102°F) that could increase the risk of heat illness.

After three weeks, mean VO2max* and lactate threshold changes were “statistically significantly greater” in both the hot water and sauna groups compared with the control group. The researchers said these post-exercise heat interventions allow people to “extend their training without increasing volume and/or intensity, meaning they can achieve performance gains without increasing the risk of overtraining or injury.

So, is heat in a sauna session after intense physical training done in the pre-run recommended or not??

Definitely yes! Because the above explained hyperthermia in the sauna leads in the muscles, cartilage, tendons and ligaments to an increased blood flow and therefore to an accelerated regeneration. The restoration of performance is achieved more quickly and not only in professional athletes.

Thus, a sauna session after training is a useful way to support the body after endurance sports or intensive strength training for effective recovery and regeneration of the muscles.

P.S. A special experience is taking a sauna with Kemitron’s Aromee fragrances – browse our webshop.

*VO2max = The maximum oxygen uptake. This indicates the maximum number of milliliters of oxygen that the body can utilize per minute in a state of exertion. It is given in milliliters of oxygen per minute.

Recommended reading on this topic (use the translator if necessary):

Think hot tub not ice bath
Post-exercise recovery is accelerated by heating
Sauna after Training (German)
Amplifying exercise
Heating Strategies Affect Endurance Performance
How sauna and sport complement each other (German)


Infusion fragrances - enchanting additions

Infusion fragrances - enchanting additions

According to a survey by the Deutscher Saunabund (German Sauna Association) (1), guests appreciate infusions with fragrances: only 3 percent of sauna guests want a pure water infusion, while 81 percent appreciate the addition of a fragrance. Further 12 per cent would like no infusion at all. In addition to the adequate amount of water, the choice of the right infusion/fragrance is of great importance. You are offered an almost endless variety on the market, and it is not easy to find your way around. First of all, the dosage is important: scent should be easily perceivable, but not intrusive. Therefore, do not use products where the dosage is unclear to you, high-quality products are characterized by a precise description. If you are unsure or do not want to think about the dosage permanently, you can consider using automatic dosing pumps or systems (we will be happy to advise you on this as well). Also important in terms of cleanliness and dosability is whether the fragrances are alcohol- or emulsion-based.

Some fragrances change in the heat, so you should definitely pay attention to fragrance stability and whether they fill the room long-lasting and sustainable. As a positive side effect, fragrances not only stimulate the sense of smell, but also have a beneficial effect on the psyche and, through it, on the body. Let the variety and the effect of pure nature surprise you above all. However, pay attention to natural fragrance oils, because only these have a – often already proven – effect on body and soul. In a combination of fragrances, individual scents should not overlap each other. The sequence should be adapted to the theme and type of effect (calming, stimulating, etc.). After all, plants have been used for their effects for thousands of years. Owners of private saunas can also take advantage of these effects:

Aphrodisiac: patchouli, rose, sandalwood, ylang ylang and cinnamon

Calming: alpine and mountain herbs, anise, bamboo, fennel, lilac, green tea, hay flower, elderberries, chocolate, vanilla, forest fruits cinnamon.

Concentration-enhancing: basil, peppermint, rosemary, black pepper, lemon and cypress

Relaxing: lilac, geranium, elderberry, honey, jasmine, chamomile, lavender, lime blossom and rosewood

Stimulating: anise, ice mint, eucalyptus, spruce needle, grapefruit, ginger, rosemary, sage, thyme, juniper and citrus fruits such as orange, tangerine, lemon, lime or grapefruit

Uplifting: acacia blossom, pineapple, banana, bergamot, green apple, kiwi, coconut, lime, mango, orange, rose, sandalwood, all citrus essential oils

If you feel unwell or dizzy in the sauna during the infusion, or if you experience shortness of breath, you should definitely leave – even if some tough-minded sauna-goers consider this a faux pas. Thoughtfulness towards others at the expense of one’s own health is fundamentally wrong. When in doubt, sensitive people prefer to do without the infusion altogether. The positive health effect can be achieved even without an infusion, as long as the interplay between cold and warm is maintained correctly.

CAUTION: Many fragrances are highly flammable, so never put the fragrances directly on the stones/sauna stoves. Ideally, you should drip the fragrance (a few drops are sufficient) directly into the water of the infusion bucket without taking the fragrance bottle into the sauna.

 

(1) Source (German)


Kemitron: The Connection between Quality and Sustainability

Kemitron: The Connection between Quality and Sustainability

Throughout the more than 40 years of its existence, Kemitron has always remained true to its corporate philosophy of only processing the best quality. During this time the competition has become tougher and more dogged, the price war has often taken on difficult proportions. In other companies, production was moved abroad and cheap goods were added to the range. Kemitron has always rejected this.

According to the motto “buy right once and save twice” we believe that good quality pays off and in long term it saves both your money and our environment.

How does this work?

The Kemitron technical products (Technico) are developed, designed and assembled from high-quality individual parts in our company. They are not purchased pre-assembled. Our employees know the blueprints, the design and every single part of the products. This also applies to those that we have meanwhile modernised or have already taken out of our range.
As we pay attention to the high quality of all individual parts, our products are therefore extremely durable, which saves the customer from throwing them away and buying new ones after a few years. On the other hand, should a functional impairment occur, our products can always be repaired, even after many years of use in continuous operation. The prerequisite is, of course, that the customer follows our recommendations for use and operation.
Since development and design, as well as manufacturing is done in-house, there are no delays in customer requests, no need to send parts back and forth, not even the little power needed to send emails, because we can always go to the engineer, the designer or to the manufacturing department and ask for information.

In this way, our customers only pay once for many years of pleasure. And mountains of rubbish with environmentally harmful individual parts are avoided.

The same applies to our fragrances (Aromee) and care cleaners/disinfectants (Pure). Created and developed in our company, they are made from high quality raw materials and are extremely economical. This saves both delivery routes to us and from there to our customers, because orders are placed less frequently. Thus, not only the customer benefits, but also our environment, because fewer deliveries plus less packaging materials on the entire level can only do good for our nature. Furthermore, Kemitron products (as far as known) are not allergenic Furthermore, Kemitron products are (as far as known) due to the high standard not allergenic. The customer therefore has to order less often and buys products for which he can rely on a consistently high quality.

So while everyone is talking about sustainability, Kemitron has been living it since its founding.


Herbs can help!

Natural essential oils are used in many different ways for room scenting or also in bath salts, perfume, facial oils and creams. However, not only do they help to spread an enchanting scent, in difficult times natural essential oils can also be used for a larger purpose:

Since scents act on the body through the oldest part of the human brain, the limbic system, they subconsciously trigger an immediate reaction in us. Because emotions are handled and controlled in this part of our brain. They are not pre-processed and filtered by the thalamus like optical or acoustic stimuli. Thus they can trigger feelings in us quite unconsciously and influence our state of mind. And because our sense of smell is closely linked to our mood and feelings, essential oils are used specifically to increase our physical and emotional well-being. Now different scents are attributed with certain effects, invigorating, promoting concentration, decelerating ... Today we want to concentrate quite consciously on the scents that are supposed to have a calming, stress-relieving or relaxing effect on us. In addition, create a relaxing and calm environment and practice relaxing breathing exercises.

Depending on health, physical condition and stress situation it can be said in principle: Flowery, soft and subtle woody notes are harmonising, whereas bitter, herbaceous or strong woody notes are calming.

Bergamot

The bergamot is known to give Earl Grey tea its unmistakable taste as a citrus fruit.  Its fragrance is said to calm, relax and soothe restlessness, while at the same time helping to regain energy. Attention! Bergamot oil can increase your sensitivity to sunlight!

Geranium

The geranium is one of our most popular balcony plants and is said to have a relaxing effect, especially in cases of stress and exhaustion.

Jasmine

Jasmine fragrance is said to be able to support you in your worries. The scent is believed to calm the nervous system, lift the mood and give new energy. For a positive start into the day, you can try to be inspired by the scent of essential jasmine oil already in the morning.

Chamomile

Chamomile is known as a soothing fragrance. It is said to have positive properties to promote inner peace and restful sleep, and to alleviate irritability, brooding and worry.

Lavender

The unmistakable scent of lavender can help you relax and relieve the nervous system. It helps with difficulties in falling asleep and for a peaceful night's rest. Restlessness, irritability and insomnia are said to be relieved by lavender scent.

Melissa

Melissa is considered a proven household remedy against stress, nervous tension, melancholy, depression and sleep disorders.  The scent of melissa is said to have a harmonizing effect on body and mind.

Orange

The orange scent is supposed to lift the mood and help to cope with stress.  So it is just the right thing for those who suffer from listlessness, nervousness and exhaustion.

Rose

Traditionally the rose is associated with love and the heart. It is said to calm sadness or inner turmoil. It is also said to help relieve tension and worry.

Rosemary

The scent of rosemary is said to awaken the spirit of life and support migraine, stress and exhaustion. Furthermore, it is believed to have warming and circulation-promoting properties.

Vanilla

The fine aroma of vanilla is supposed to lift the mood, exude a warm atmosphere and also serve for relaxation.

Incense

Incense can look back on an already very long history.  It is extracted from the resin of the incense tree and can be used to relieve tension and relax the mind. Traditionally incense is used to deepen meditation.

Ylang-Ylang

Ylang-Ylang oil comes from the flowers of a tropical tree.  The fragrance is said to reduce symptoms of anxiety and depression, lift the spirits and relieve headaches. Attention! It can possibly lower blood pressure, so it should not be used by people with low blood pressure!

Lemongrass

The aromatic scent of lemongrass is not only said to have a stimulating and very refreshing effect, it is also said to relieve anxiety, lighten the mood and help with listlessness.

Please always keep in mind: Fragrances can have a supporting and relieving effect in many ways. However, please always follow the dosage instructions and the recommendations on the label or package insert. For medical purposes, seek advice from trained specialists! Aromatherapists and doctors will be able to help you at any time.


The difference between aromatherapy and aromachology

The science of fragrances in regard of personal well-being can basically be divided into two areas: aromatherapy and aromachology.
aromatherapy is exclusively therapeutic and may only be performed by licensed professionals. It uses only natural raw materials and researches which scents cause a certain physiological reaction.
A more scientific approach is taken by aromachology, which examines which psychological reactions are caused by which fragrance and for what reasons.

The beginnings of aromatherapy as practised today date back to the 1920s. However, the use of essential oils and aromas has been known at least since 3000 B.C., where they were already used for cultural but also for medical purposes. As mentioned above, aromatherapy uses only natural ingredients and fragrances to treat conditions related to mood and emotions. As this is a very sensitive subject, it may only be performed by professionals. Although it involves inhaling or burning fragrances, the main focus is not on the smell of the essential oils, but on the healing properties they contain.

In contrast, aromachology, which emerged in the 80s of the last century, is based exclusively on scientific studies. It focuses on the psychological effect of scents on moods and emotions. It is not limited to natural fragrances, but is also positively disposed towards the use of synthetic fragrances. Originally, it was mainly implemented in the retail trade to improve the customer experience or to stimulate purchase. However, thanks to new research, aromachology is now being taken more seriously than it was at the turn of the millennium and used for more beneficial purposes, including pain relief and treatment.

Today, the wisdom of aromatherapy and the science of aromachology are increasingly combined to create a new generation of "functional fragrances" (see also our blog text: The difference between functional fragrance and aromatherapy). In fact, aromatherapy has been used to prove some claims that have been around for centuries, such as the relaxing properties of lavender. As a result, the fragrance is being reformulated as an important active ingredient. However, this also demonstrates the need for these sensitive issues, which are particularly important for the right combination and correct dosage, to remain in the hands of specially trained professionals.


Kemitron Aromee fragrances and what they contain

Kemitron knows: Especially in spas and saunas, where different temperatures and often generous room areas are used, stable and constant intensity scents are important.

In order to produce these, the quality of the raw materials is crucial. Because only high-quality ingredients can achieve a lasting fragrance experience and only a high concentration of essential oils can unfold their healthy and manifold effects on the body and soul.

This is why Kemitron only uses first-class raw materials such as pure essential oils. This well thought-out composition is a major reason why Kemitron fragrances remain stable in their intensity, even if the container is used for a longer period of time.

In addition, we hold the entire value chain in our own hands in order to achieve the best possible structure of effects. This means that from the selection of the fragrances, through the creation of the recipe compositions to the manufacture, everything takes place directly in our company.

In addition, Kemitron exclusively uses fragrances that are subject to the IFRA* standard code and are based on the scientific analyses of the RFIM**.

Our corporate philosophy obliges us to treat resources and the environment with care - and to do so holistically, both when purchasing raw materials and when using our products.

Since we refrain from using preservatives and low-grade additives, we have not yet discovered any reactions to Kemitron Aromee products that are harmful to health or otherwise. In order to guarantee this, a verifiable use of original Kemitron products as well as adherence to our dosage recommendations is a prerequisite.

*The International Fragrance Association (IFRA) is the global representative of the fragrance industry and issues updated standards for fragrances.
**The Research Institute for Fragrance Materials (RFIM) is the international scientific authority for the safe use of fragrances.