Why Fresh Laundry Makes Scents (PG Educational Leaflet)

7/29/2019 Why Fresh Laundry Makes Scents (PG Educational Leaflet)

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Why fresh laundrymakes scents


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More than just a smell

The mouthwatering smell of a ripe melon, the arousing aroma of coffee, the fresh smell that hangs in the

air after a spring shower

These are just a few of the 10,000 different smells that people can distinguish. Astonishing as it sounds,

compared to our fellow creatures our noses are nothing special. Dogs noses are up to 10,000 times more

sensitive than ours. And just the whiff of a single molecule of the female mothpheromone bombykolcan

captivate any male moth within a mile, sending it fluttering towards her.

We do not pay much attention to it, but our sense of smell plays host to a variety of odours every day

and gives us important information about the world we live in. We know to avoid rotten food and are

alerted to danger by the smell of smoke.

Smells give food their flavour. What is more, a long-forgotten smell from childhood can trigger deep

emotions in us and conjure up the past in vivid detail. And people can recognise others by their smell

mothers can identify their babies and vice versa, and parents can recognise the smell of their children.

Dogs are able to pick out individuals according to their smell, though they cannot distinguish between

identical twins.


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Fresh smelling clothes

Scents can create a range of sensations. They can enhance our mood, invigorate us, or calm us.

A preference for a certain fragrance reveals something about an individuals identity. All this comes into

play when designing washing powders and detergents. Wearing fresh smelling clothes is pleasurable.

The right scent can put you at ease or make you feel confident. It also forms part of your identity.

Whether you choose a product with a noticeable freshness or a barely traceable fragrance is all part

of who you are. Throughout Europe, P&G offers a range of laundry detergents and fabric softeners

that caters for all tastes. This is important because a products inherent fragrance also influences the

consumers choice. In fact, one-third of consumers sniff products at the shelf before deciding to buy.

People connect certain smells to specific functions. This leaves the perfumer with the challenge of

matching the right scent to the right product. For instance we associate almond with soft skin whereas

lemon is linked to degreasing. And while we accept pine in floor cleaners we reject it in fabric softeners.

Some smells we find inherently repulsive even one-day-old babies faces react to the odour of fish and

rotten eggs but most of our responses to smells are learned.

Some perfumes are valued all over the world. Others, such as lavender, have particularly strong connotations

in certain countries. For instance, the French associate lavender with hot summer vacations in Provence

whereas in the UK lavender is associated with relaxiation, comfort and femininity. Another example is the

long established Savon de Marseille soap which is liked a lot by Southern European countries like France

and Spain because it reminds them of good old traditions.

People interpret fresh-smelling clothes as the signof a laundry job well done

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During the whole laundry process, our nose is more often used than our eyes. Before the wash we use our

nose to decide whether a shirt or blouse needs washing; this simply reflects that it is often easier to smell

than to see that a garment needs cleaning. And after the wash we smell the garment again to determine

whether it is clean. Indeed garments laundered in unperfumed detergents are often considered by

consumers not to be clean due to the absence of a fresh scent. When it comes to delivering a desirable

laundry experience, freshness is essential.

In Southern European countries this is particularly significant (in France and Italy the figure is as high as

90%) but even in Northern Europe (Germany, the U.K., the Netherlands, and Nordic countries), where

perfume is typically less important, laundry freshness is still a major consideration (importance varies from

70 to 80%). People interpret fresh-smelling clothes as the sign of a laundry job well done. When you ask

consumers what they want in laundry detergents, the resounding answer is longer lasting freshness

freshness after washing clothes, after drying and above all in the wardrobe and in-wear. In fact, when

clothes dont smell fresh and clean, people feel the need to re-wash.

Getting clothes to smell right during the different phases of the laundry cycle washing, drying, ironing,

storing and in-wear makes the whole job of cleaning clothes much more enjoyable. Doesnt it make

you feel so good when sleeping in freshly washed bed linen?

A perfumer needs to be able to identify thousands of smells and know how to classify and recognize

them. At P&G, most of the perfumers start out as trained chemists who then spend approximately three

years learning the art and science behind creating a fragrance. To help them refine their skills, they also

spend time training in external perfume houses. P&Gs perfumers need to combine all their skills when

designing a product. They have to be able to select and blend the individual notes of the perfume, all at

the right level, so that the perfume and the product form a compatible whole that will not degrade.

It is no easy task though. So this is where P&G brings in its innovative technologies.

Company surveys show that mostconsumers believe freshness deliveredby perfumes on laundry is

extremely important or very important


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A skilful blend of art and science

Throughout history perfumes have reflected society. The first scents were created out of plant and animal

extracts. In ancient civilisations they were used in religious ceremonies, in medicines, as cosmetics and as

gifts. Todays perfumes contain a huge range of ingredients to give a dazzling range of fragrances.

Fashions change but the purposes behind perfumes remain constant.

With thousands of raw ingredients to choose from, a perfumer needs talent and an excellent memory

when creating a fragrance. These same skills are used by P&Gs perfumers as the fragrances in todays

laundry products can be just as complex as the fine fragrances created by their counterparts in prestigious

perfume houses. P&G perfumers work with a smaller palette of ingredients ones that will not break

down during the wash cycle. But out of the 3,000 ingredients available, they use no less than 1,000.

Each finished fragrance contains 30 to 200 ingredients. Compare this with the average fine fragrance,

which contains a blend of 10 to 100 ingredients or even the most complex perfumes worn today,

containing many hundreds of ingredients.

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Perfume notes

Try describing a smell. It is difficult. Perfumers learn the language of perfumery by using the fragrance

pyramid system, based on how quickly the ingredients evaporate. Borrowing from music terminology,

each individual scent is called a note. The perfumes themselves are a skilful blend of top, middle and base

notes. The top notes evaporate the fastest, creating the fragrances first brief impression. This is what you

smell when opening a bottle of laundry liquid or fabric softener. Perfumers typically describe them as

green, fresh and citrus. The core character of the scent comes from the middle or heart notes, which

develop later and form the body of the fragrance. You experience that when you take the laundry out

of the washing machine. These can be floral, spicy or fruity. Later the perfume releases the base or dry

down notes, the most substantive ingredients. They can smell musky, woody, warm, mossy and so on.

These are the notes that will make your laundry smell fresh when it is ready to wear.

The Fragrance Pyramid

MIDDLE NOTES(wet laundry)

Spicy, Floral & Fruity

BASE NOTES(dry laundry)Woody & Musky

TOP NOTES

(neat product odour)Green & CitrusVolati

lity


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The sense behind scents

So how do we identify all those myriad smells that

we encounter every day? It all starts when odour

molecules of whatever you are smelling hit your

nose. These volatile molecules (meaning they

evaporate easily) drift up the nasal passages to a

postage-stamp-sized area of nerve cells lying just

below the eyes (the olfactory epithelium).

Each nerve cell is covered in minute hairs that

each play host to one type of the 1,000 or so

sensors known as odour receptors. The human

nose contains several millions of odour receptors.

Odour receptors are quite picky, they have

different shapes each designed to hook up with a certain shape odour molecule like a lock and key. So,

some odour receptors will respond to cut grass molecules and others will respond to freshly baked bread.

When the odour molecule hits the right receptor this triggers the neurons in your nose to send a signal to the

olfactory bulb in the very front of the brain. The signals are relayed from the olfactory bulb to the brains higher

olfactory cortex, triggering patterns of activity in the cortex corresponding to certain smells and to the limbic

system, which generates emotional feelings. One pattern of signals will mean coffee, another aftershave.

INNER CHAMBEROF NOSE

mucus

olfactory bulbcribriform plate

olfactory nerves

olfactoryepithelium

Scent Laundry Product Freshness Experience

Turning scent into a freshness experience

Creating a freshness experience is more than mastering the art and science of composing unique

perfumes. The scent delivered through perfume has to push the right buttons to appeal to consumers

and evoke the emotions that fit with their personality. To turn a scent into a real freshness experience the

colours, imagery and words selected to define the product have to all fit together and give the consumer

the right expectations of the scent behind it. Visuals, colours and words carefully selected to target the

group of consumers it is aimed at, convert the scent into a universally understood language. Successful

communication of what the scent represents will greatly contribute to the perception of the brand,

helping it to stand out from the crowd.


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The sweet smell of success

In line with its philosophy of keeping in close touch with peoples desires, P&G

constantly probes people about the sort of fragrance they want on their laundry

products. When testing the variants of a fragrance, we ask consumers to smell

products directly from the container as well as washed items. What did they think

of their intensity, their character? P&G then goes further, inviting people to use

new detergents in their homes. How does the fragrance perform over the wash

cycle? What is it people want from laundry detergents and fabric softeners?

Careful listening is one step on the path to designing the perfect perfume.

Time and again, consumers say that what they want is more staying power for the

fresh smell on fabrics. Consumers feel that the freshness factor drops with each

stage in the laundry cycle. Ideally they want the fragrance to keep on working,

especially at two key points or moments of truth when storing clothes and

when wearing them. A wardrobe full of fresh-smelling clothes is enjoyable.

Wearing such clothes boosts confidence and gives pleasure.

Getting the ingredients to keep working in our clothes after drying and in-wear is

a tricky challenge for our perfumers. This depends on the ingredients staying

power. For instance, how well does it withstand heat and water plus detergent,

or sunlight if hung outside to dry will it dissolve away or evaporate? When

clothes are washed, water and detergent carry away the more soluble parts of

the fragrance, and when clothes are dried perfume ingredients evaporate. In

conventional perfumes, this mainly leaves some of the heavier ingredients (the base

notes) on the fabric, giving the clothes their traditional fresh smell. The challenge

at P&G is to extend the range of perfume ingredients that stay longer on the

fabric leaving a noticeable fresh scent.

Traditionally, higher levels of perfume were used in the laundry detergent to boost

freshness on dry clothes. The downside was that the scent of the detergent itself

became too strong and turned people off. This led to the search for more balanced

compositions that made the level of fresh smell pleasant during all stages of the

laundry process.

One exciting development is pro-perfumes. The pro-perfume technology works

like an anchor that retains the perfume that is otherwise washed off the fabrics.

The freshness releases slowly over time and magically materialises on your clothes

Consumers feel that thefreshness factor drops witheach stage in the laundry cycle


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On product Wetlaundry

During /After drying

Ironing Puttingaway

Putting on Wear

FRESHNESS

INTENSITY

FRHNE

NTNST

FRESHNESS

INTENSITY

STAGES OFLAUNDRY PROCESS

ideal

conventional

Action of pro-perfume

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Recently, P&G also created a fabric softener, Lenor Stayfresh, which helps to neutralise unpleasant

smells. The key ingredient, cyclodextrin, works by hooking up with unpleasant odour molecules and

deactivating them. This technique was first used in Fbrze, a spray used for eliminating bad odours on

fabrics. By getting rid of unpleasant smells, Lenor Stayfresh helps clothes keep their just-washed fragrance

and delivers real in-wear freshness.

when it is needed. Researchers are currently extending the range of freshness

characters delivered by pro-perfumes. In just 10 years P&G has filed more than 100 perfume patents,

many of them relating to the delivery of longer lasting freshness on dry laundry.

Another breakthrough in perfume delivery is controlled freshness release via encapsulation of substantive

perfume particles. Here the freshness is locked up in microcapsules that slowly dissolve in the wash,

releasing it on damp and dry laundry.

Qualitative freshness intensity delivered

during the different stages of the laundry process


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Safe perfumesFortunately, a perfume allergy is a relatively rare phenomenon. For laundry detergents, our data

and the available scientific information indicate that the risk of perfume allergy is extremely small

and there are no reasons to be concerned about the perfume in laundry detergents.

Up until now, for confirmation purposes we have tested our laundry detergents for skin allergies

(HRIPT) or skin intolerance in tens of thousands of volunteers. We have never seen any perfume

allergy caused by one of our detergents. For fabric softeners, we tested with over four thousand

volunteers and have not noticed anything either. We have also not seen any allergic reactions from

the actual use of one of our laundry products, even though they are used by millions of European

consumers on a daily basis.

All our laundry products and their perfumes are formulated with the greatest care and utmost

attention to safety. The perfumes are formulated taking into account our stringent internal

safety standards for every ingredient, as well as safety standards set by the International Fragrance

Association (IFRA) and those of the Research Institute for Fragrance Materials (RIFM). Whenever

the perfume of a product changes, our scientists in charge of safety always evaluate the detailed

composition and make sure there is no risk. The scientists take into consideration all available data

on all ingredients as well as the various possibilities of exposure to the product, and they conduct

clinical trials. P&Gs approach to assessing skin safety of its detergent products, including per-

fumes, has been reviewed and approved by an international group of dermatology experts from

Europe, the USA and Canada. Moreover, the company has published and continues to publish

papers on the subject in peer-reviewed literature (visit www.scienceinthebox.com for abstracts).

It is important to note that laundry detergents and fabric softeners are not intended for direct

application on the skin. They normally only come into contact with the skin in a very diluted

solution during hand washing, a habit which has become quite infrequent nowadays.

The amount of perfume ingredients left to deliver a pleasant fresh and clean odour on the washed

laundry is very small, after the four rinses that typically occur during a machine wash. This amount

is still sufficient to provide a fresh scent to the laundry, because the human nose is incredibly

sensitive. And the fresh and clean odour is highly appreciated by consumers.

To further help physicians as well as people who are allergic to a particular perfume substance,

detergent manufacturers have started to list perfume substances on their labels, when present in

the product at a concentration greater than 0.01%. The labelled substances belong to a list of 26,

selected by the European Union Scientific Committee of Consumer Products (SCCP). Industry fully

supported the new European regulations in force as of October 2005 and aim to better inform

consumers on products. Cosmetic companies already started doing this back in 2004.

In some countries, our line of laundry products may include a perfume-free variant. We do this to

meet the needs of those consumers who want a perfume-free product. However the majority of

consumers enjoy the benefit of a pleasant odour of fresh and clean laundry and they can safely

do so.

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The perfume exposure of a laundry detergent throughhand washing is about 100 times less than with aperfumed product applied directly to the skin.


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Did you know?

Sailors know how close they are to the Bering Sea Islands,between Alaska and Russia, by the powerful smell of

citrus coming from colonies of crested auklets. Studies

show that compounds in the citrus scent emanating

from the birds repel ticks and other parasites. A smart

way to protect their species!

How can you detect about 10,000 odours if you have

only got 1,000 types of choosy receptors? Scientists

figure that groups of receptors act together in different

configurations to pick up odours. A leading olfaction

researcher, Linda Buck, compares it to the alphabet: Thealphabet contains just 26 letters, yet we have thousands

of words and numerous complex languages to convey

meaning. Similarly, with 1,000 types of odour receptors

working together in different combinations, your nose

can make codes for about 10,000 odours.

It is easy to see if someone is afraid but can we smell

fear? In one Austrian study, women were asked to wear

underarm pads to catch any sweaty response to watching

a fear film. The next day a neutral film was shown

and again underarm pads collected sweat. When asked

to smell the underarm secretions, astonishingly, the

women could identify the fear underarm pads.

Everyone has a unique smell except identical twins. They

do not only look alike, they also smell the same!

Our sense of smell seems to depend on age and sex. The

sense usually deteriorates with age. And in tests women

are time and again better at identifying smells than men.

Our tongues have just four types of taste buds: salt,

sweet, bitter or sour. But we experience thousands of

tastes because some 75% of our sense of taste comes

from our sense of smell. That is why a cold can ruin the

taste and smell of food. A viral infection causes mucus

to build up on odour receptor cells in the nose, stopping

them from sending signals to the brain.

The inability to smell, known as anosmia, afflicts some

1.2% of the population. Some people inherit the

condition. Others become blind to odours through

illness, head injuries or exposure to certain medicines orpesticides. People who develop anosmia tell of the deep

loss they feel because they can no longer smell people,

food, flowers, the weather all the background aromas

we take for granted. In some cases, anosmia leads to

depression and loss of sexual desire.

Intriguingly, recent research reveals that human

pheromones may also exist. Pheromones are

better known from the animal world which is full of

subtle chemical messengers sent out to allure a mate or

to warn of imminent danger. Thousands have been

detected in all sorts of creatures, each one carrying vital

information about matters such as food, territory or sex.

Many natural substances such as coffee, strawberries

and vanilla have as many as 100 or more types of volatile

molecules. By contrast, others such as lemons, bananas

and cloves contain just a few.

The perfume industry is comparatively small, selling

about 10.5 billion euros worth of perfume raw

materials annually.

Worldwide, P&G is the largest perfume house with

35 expert perfumers.

The Fabric and Home Care and Beauty Care divisions

alone use 400 different types of perfumes.

P&G has perfume manufacturing facilities in

Germany, the U.S. and Mexico, which produce

40,000 tons of perfumes a year.

Depending on their make-up, fragrances can cost

from just $2 per kg to a staggering $8,000 per kg.

Common perfume levels in laundry products are

between 0.2 and 1.5%. This means that typically

there is less than 1g of perfume in the wash

solution. With the subsequent rinses and the drying,

this leaves only a small amount of perfume on the

garments to make them smell fresh.

Facts and figures

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P

rocter&GamblePrintedonnonchlorinebleachedpap

er

www.magenta.be

Procter & GambleFabric Care

External RelationsEurope

Visit our website:www.eu.pg.com

Here you also find linksto the websites of our brands.

For more info on the science behindour products, visit:

2005

www.scienceinthebox.com

Why Fresh Laundry Makes Scents (PG Educational Leaflet)

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