SIST EN 61254:1998
(Main)Electric shavers for household use - Methods for measuring the performance
Electric shavers for household use - Methods for measuring the performance
States and defines the principal performance characteristics for mens electric shavers (rotary and vibratory) which are of interest to the user, and describes standard methods for measuring these characteristics.
Elektrische Haushalt-Rasierer Prüfverfahren zur Bestimmung der Gebrauchseigenschaften
Rasoirs électriques à usage domestique - Méthodes de mesure de l'aptitude à la fonction
Indique et définit les principales caractéristiques de performances des rasoirs électriques pour homme qui intéressent l'utilisateur, et décrit des méthodes de mesure normalisées de ces caractéristiques.
Electric shavers for household use - Methods for measuring the performance (IEC 1254:1993)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61254:1998
01-januar-1998
Electric shavers for household use - Methods for measuring the performance (IEC
1254:1993)
Electric shavers for household use - Methods for measuring the performance
Elektrische Haushalt-Rasierer Prüfverfahren zur Bestimmung der
Gebrauchseigenschaften
Rasoirs électriques à usage domestique - Méthodes de mesure de l'aptitude à la fonction
Ta slovenski standard je istoveten z: EN 61254:1994
ICS:
97.170 Oprema za nego telesa Body care equipment
SIST EN 61254:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 61254:1998
---------------------- Page: 2 ----------------------
SIST EN 61254:1998
EUROPEAN STANDARD EN 61254
NORME EUROPEENNE
EUROPBISCHE NORM April 1994
UDC 646.72:687.53.052:672.715.3
Descriptors: Household electrical appliances, electric shavers,
performance, characteristics, measurements
ENGLISH VERSION
Electric shavers for household use - Methods
for measuring the performance
(IEC 1254:1993)
Rasoirs blectriques A usage Elektrische Haushalt-Rasierer
domestique - Mbthodes de mesure Prufverfahren zur Bestimmung
de l'aptitude h la fonction der Gebrauchseigenschaften
(CEI 1254:1993) (IEC 1254:1993)
This European Standard was approved by CENELEC on i994-03-08.
CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of
a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards
may be obtained on application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of
a CENELEC member into its own language and notified to the Central Secretariat
has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comitb Europben de Normalisation Electrotechnique
Europaisches Komitee fur Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B-1050 Brussels
@ 1994 Copyright reserved to CENELEC members
Ref. No. EN 61254:1994 E
---------------------- Page: 3 ----------------------
SIST EN 61254:1998
Page 2
EN 61254:1994
FOREWORD
The text of document 59(C0)33, as prepared by IEC Technical
Committee 59: Performance of household electrical appliances, was
submitted to the IEC-CENELEC parallel vote in July 1993.
The reference document was approved by CENELEC as EN 61254 on
8 March 1994.
NOTE: Sweden has no obligation to implement this European
Standard .
The following dates were fixed:
- latest date of publication of
an identical national standard (dop) 1995-03-15
- latest date of withdrawal of
conflicting national standards (dow) 1995-03-15
For products which have complied with the relevant national standard
before 1995-03-15, as shown by the manufacturer or by a certification
body, this previous standard may continue to apply for production
until 2000-03-15.
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given only for information.
In this standard, annexes A, B, C, and D are normative and annexes E
and F are informative.
ENDORSEMENT NOTICE
The text of the International Standard IEC 1254:1993 was approved by
CENELEC as a European Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 61254:1998
---------------------- Page: 5 ----------------------
SIST EN 61254:1998
NORME CEI
INTERNATIONALE IEC
61254
INTERNATIONAL
Première édition
STANDARD
First edition
1993-12
Rasoirs électriques à usage domestique —
Méthodes de mesure de l'aptitude à la fonction
Electric shavers for household use —
Methods for measuring the performance
© IEC 1993 Droits de reproduction
réservés — Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
X
PRICE CODE
International Electrotechnical Commission
IEC Me ayHapcgHaH 3JleKTpoTexHH4ectian
KOMHCCHH
vigueur
Pour prix, voir catalogue en
•
For price, see current catalogue
---------------------- Page: 6 ----------------------
SIST EN 61254:1998
1254 ©IEC: 1993 - 3 -
CONTENTS
Page
FOREWORD 5
INTRODUCTION 7
Clause
1 Scope 9
2 Definitions 9
3 List of measurements 9
4 General conditions for measurements 11
5 Measuring methods for dimensions 11
5.1 Overall dimensions 11
5.2 Mass 11
5.3 Length of the supply cord 11
6 Determination of the operation time per charge 11
6.1 Operation time per battery charge 11
6.2 Operation time per primary battery 11
7 Shaving performance 13
7.1 Composition of the test panels 13
13
7.2 Test duration and test procedure
7.3 Distribution of the shavers 15
7.4 17
Statistical analysis
7.5 Final ranking 17
8 Trimmer pe rf 19
ormance
9 Gravimetric analysis of the difference in closeness of shave 19
9.1 Composition of the test panels 19
9.2 Test procedure and distribution scheme 19
23
9.3 Conversion from mass into average residual hair-stubble length
9.4 Statistical analysis 25
Figure 1 - Schematic presentation of the test procedure 27
Annexes
A Questionnaires 29
B 41
Instructions to the testers
C Distribution scheme 45
D Possible variations in the testing scheme 51
E Application of the method 53
F Bibliography 90
---------------------- Page: 7 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
ELECTRIC SHAVERS FOR HOUSEHOLD USE -
Methods for measuring the performance
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2)
The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use published in the form of standards, technical
reports or guides and they are accepted by the National Committees in that sense.
4)
In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
International Standard IEC 1254 has been prepared by IEC technical committee 59:
Performance of household electrical appliances.
The text of this standard is based on the following documents:
DIS Report on voting
59(CO)33
59(CO)35
Full information on the voting for the approval of this standard can be found in the repo
rt
on voting indicated in the above table.
Annexes A, B, C and D form an integral part of this standard.
Annexes E and F are for information only.
---------------------- Page: 8 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 – 7 –
INTRODUCTION
Determination of the performance characteristics of dry shavers is usually based on the
subjective analysis of a test panel. The results of such a test programme may be affected
by prolonged use of a certain type of shaver prior to test and subsequent use of a
particular shaver system during a test. Intrusive advertising campaigns may have an
influence as well.
In the test method of this standard such problems are largely overcome by taking the
following measures:
a) Care is taken to ensure that different shaver systems (rotary and vibratory) are
represented by equal numbers of shaver users.
b)
To maintain the balance between the shaver systems throughout the entire test
period, each tester uses his own shaver prior to using each test shaver.
c) Conclusions on differences between shavers are based on statistical analysis,
taking into account possible user-effects (see point a).
NOTE - Whereas the performance data are assessed on a non -comparative basis, the results should be
evaluated by comparison.
---------------------- Page: 9 ----------------------
SIST EN 61254:1998
1254 ©IEC: 1993 - 9 -
ELECTRIC
SHAVERS FOR HOUSEHOLD USE -
Methods for measuring the performance
1 Scope
This International Standard states and defines the principal pe rformance characteristics
for men's electric shavers, which are of interest to the user, and describes standard
methods for measuring these characteristics.
This standard is not concerned with safety or with pe rformance requirements.
2 Definitions
2.1 mains shaver:
Shaver which can be operated directly from the mains supply.
NOTE - The shaver may also be suitable for an additional power source.
2.2
rechargeable shaver: Shaver which is supplied by a rechargeable battery belonging
to it.
NOTE - A rechargeable shaver may
also be operated directly from the mains supply.
2.3 battery shaver:
Shaver which is supplied by primary batteries.
2.4 car shaver:
Shaver which is supplied by a car or boat battery.
2.5 rotary shaver:
Shaver with round shaving head(s) and usually rotating cutters.
2.6 vibratory shaver:
Shaver with linear shaving head(s) and usually vibrating cutters.
2.7 trimmer:
Accessory incorporated in the shaver, to groom particular facial hair, e.g.,
moustache, beard or side whiskers.
3 List of measurements
Perf
ormance is determined by carrying out the following measurements:
Overall dimensions (5.1).
- Mass (5.2).
- Length of the supply cord (5.3).
- Operation time per battery charge (6.1).
-
Operation time per primary battery (for battery shavers only) (6.2).
- Shaving pe rformance (clause 7).
- Trimmer pe rf
ormance (clause 8).
Gravimetric analysis of the difference in_closeness of shave (clause 9).
---------------------- Page: 10 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 - 11 -
4 General conditions for measurements
Unless otherwise specified, the measurements are made under the following conditions:
- Ambient temperature: 20 °C ± 5 °C.
- Supply voltage: rated voltage.
5 Measuring methods for dimensions
5.1 Overall dimensions
The maximum overall dimensions of the shaver - height, length and width or diameter -
are measured and indicated in millimetres. Any fixed projection on the appliance itself is
taken into account, including control knobs and the cord guard of any supply cord.
Movable parts such as the trimmer are in the closed position.
The overall dimensions of the storage case are also measured.
5.2
Mass
The mass of the shaver in use is measured and indicated in grams to the nearest five
grams.
NOTE - "Shaver in use" means without protection cap but with batteries or supply cord, as appropriate.
5.3 Length of the supply cord
The distance between the entry points into the shaver and the plug, including any cord
guard, is measured. Coiled cords are stretched with a pull of approximately 1 daN, and
indicated in metres rounded down to the nearest 0,05 m.
6 Determination of the operation time per charge
6.1 Operation time per battery charge
After being fully charged and discharged, the batteries are fully charged according to the
instructions for use. The shaver is operated for periods of 5 min, separated by intervals
of 24 h. The test is terminated when the cell voltage drops below 1,05 V with the shaver
running in free air. The operation time is expressed in minutes.
NOTE - The operation time resulting from this test procedure will be higher than the time resulting from
practical use.
6.2 Operation time per primary battery
The shaver is operated as specified in 6.1 using new batteries. The test is terminated
when the cell voltage drops to approximately 0,9 V with the shaver running in free air. The
operation time is expressed in minutes.
NOTE - The operation time resulting from this test procedure will be higher than the time resulting from
practical use.
---------------------- Page: 11 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993
— 13 —
7
Shaving performance
7.1 Composition of the test panels
Each panel is to be composed so that it is reasonably representative of the adult male
population of the country in which the test is performed, particular attention being paid to
hair density, rate of beard growth, toughness of the beard, sensitivity towards skin
irritation, and the time taken to shave.
The members of the test panels should not be influenced by preconceived ideas.
Subpanels of equal size should be formed, each subpanel representing one of the two
basic electric shaver systems:
— rotary type shaver users (ROTA panel);
—
vibratory type shaver users (VIBRA panel).
For statistical reasons, the number t
of testers in each of the above subpanels should be
at least 12.
NOTES
1 Whereas some deviation of the test panel composition from the real situation in a count ry will not have
a noticeable influence on the results, it is essential that subpanels have comparable compositions.
2 A subpanel composed of testers who use wetshavers (razor blades) may be considered.
7.2 Test duration and test procedure
7.2.1
Test duration
The test period is preceded by a two week introduction period in which the panel testers
familiarize themselves with the other shaving system, i.e. rota ry type shaver users shave
with vibratory type shavers, and vibratory type shaver users shave with rotary type
shavers.
The test period for each shaver, which should start within a week of the introduction
period, has three shaving days. The first day of each period the tester uses his own
shaver (see annex D).
NOTES
1 If a small number of shaver models are to be tested, the three days period can be extended to six
days. On day 7 the testers use their own shaver (see annex D).
2 For panels with a low density of beard hairs or light beards, each test day may be preceded by a
non-shaving day (see annex D).
---------------------- Page: 12 ----------------------
SIST EN 61254:1998
1254 ©IEC: 1993 - 15 -
7.2.2 Test procedure
Day 1
On the first shaving day each panel tester shaves with his own shaver, which is used as a
reference. Questionnaire 1 (see annex A) is to be completed immediately after shaving,
but only in the first two test periods.
NOTE - Questionnaire 1 is not included in the final analysis. It allows for the test institute to characterize
the user-panels, particularly with respect to the average level of judgement scores.
Day 2 and Day 3
On the second and third shaving days the panel tester shaves with one of the test
shavers. On both days he records the shaving time with a stopwatch, and immediately
after shaving fills in questionnaire 2 (see annex A) relating to shaving time, closeness of
shave, and skin comfort.
NOTE - Possible variations in the testing scheme are given in annex D.
7.2.3
Handling, convenience and storage, etc.
For each test period the handling, convenience and storage, etc. of the test shaver are
assessed and questionnaire 3 is completed on the last day of the test period (see
annex A).
The test is continued until each panel tester has tested each shaver once.
The instructions for panel testers is given in annex B.
7.3 Distribution of the shavers
The shavers are distributed so that each panel tester:
- shaves with each shaver in turn;
- uses each shaver an equal number of times (usually once).
The following should be observed as far as possible:
- For each panel tester, the sequence of distribution of the shavers should be different.
NOTE - This procedure avoids possible interaction between shavers.
- The first shaver to be tested shall not be the same as that used in the introduction
period.
- If a particular shaving system (vibra or rota) is substantially under-represented, all
shavers of that system should be tested sequentially.
NOTE - This procedure limits the influence of the over-representation of the other system.
- The number of each model of shaver should be as small as possible.
NOTE - Although each shaver is judged individually, the method proposed by Kraitchik (1953) can be
used as an efficient tool to produce a distribution scheme. The method is illustrated by the example shown
in annex C.
---------------------- Page: 13 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 -17 -
7.4 Statistical analysis
Using a 10 point scale, as shown in annex A, the results are analysed by using an
analysis of variance.
The following sources of variation are included:
- variation due to subpanels p;
- variation due to users t (within subpanels
p);
- variation due to shaver types n;
- variation due to the interaction p x n;
- variation due to the interaction
t(p) x n;
- variation due to experimental error (residual variation).
As an example table 1 shows the sources of variation and the associated numbers of
degrees of freedom (dl) 2, k
for the case p = f(p) = 18, n = 9, (number of the repetitions) = 2.
Table 1 - Sources of variation and associated number of degrees of freedom
Source of variation df
Grand mean 1
Subpanels p 1
Users (within panels) t(p) 34
Shaver types n 8
Interaction p x n 8
Interaction t(p) x n 272
Residual 324
The homogeneity of the shaver types can be assessed with an F-test. Given a significant
difference between types, it is possible to establish clusters of types (see annex E).
7.5 Final ranking
If the statistical analysis shows a significant interaction between subpanels and shaver
types (p x n), results for each subpanel have to be presented separately.
For each result e.g. closeness on cheek, chin, under the nose (see annex A); the analysis
leads to a result which can be shown schematically. An example for nine shavers, X 1 X9
to
is given below:
---------------------- Page: 14 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 - 19 -
X3 X9
The horizontal bars below the characters
X5, X 1 , etc., represent the results of the analysis
of variance. Shaver types X5 and X 1
form the first statistical group, showing that the
difference between X5
and X 1 does not differ significantly from zero. The second statistical
group is formed by shavers X 1 , X4 , X3 2
and X , the third by X2 , X7 and X6 and the fourth by
X6, X8 X9.
and
Differences in average scores should only be identified if the relevant shaver types belong
to different statistical groups.
8 Trimmer performance
The evaluation of trimmer pe rformance is included in questionnaire 3 (annex A).
9 Gravimetric analysis of the difference in closeness of shave
In this analysis the relative closeness of shave produced by different shaver types is
determined by establishing the total yield of hair and skinflakes, and by applying
mathematical treatment and statistical analysis of the data.
The method is of a differential nature, testers shaving one side of their face with a shaver
of one particular type and the other side of their face with another. Thus, results always
relate to differences in shaving quality rather than to absolute values. The gravimetric
analysis has to be performed in a laboratory.
NOTE - References to a document giving extensive information related to the development and
background of the method are given in annex F.
9.1 Composition of the test panels
Each panel is to be composed as specified in 7.1. The number of testers in each
t
subpanel shall be at least six but preferably 12.
9.2 Test procedure and distribution scheme
The method is based on test periods of four days, subdivided into two blocks of two days.
On the day preceding the first test day, the testers shave at home as usual (see figure 1).
During the test period the testers shave until they consider themselves clean shaven.
---------------------- Page: 15 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 - 21 -
Day 1
On the first day the testers arrive at the laboratory with a 1 day beard.
They shave the left side of their face with a shaver of type A and the right side of their
face with a shaver of type B. The shaving time on each side is recorded separately.
Day 2
24 h ± 4 h later the testers return to the laboratory, without having shaved. Although the
beard has grown, the difference in closeness that resulted from using the shavers A and B
on the first test day still manifests itself in a difference in stubble length between the left
and the right side of the face.
Each tester shaves the left side of his face with a reference shaver (S). The shaving time
is recorded. The amount of hair and skinflakes, Ms, removed by shaving and collected, is
determined by weighing the reference shaver before and after shaving.
NOTES
1 Reference shavers can be any type of shaver, provided that the hair-shavings are retained.
2 MS can be determined accurately with an analytical balance.
3 The temperature of the shaver at the moment of weighing before and after the test should be similar.
The procedure is repeated on the right side of the face.
NOTE 4 — A different reference shaver of an identical type may be used.
The difference in closeness (expressed in mg) after shaving on the first day with shavers
A and B, respectively, is the difference in mass between left and right side of the face
(Mslll - Msrll).
NOTES
5 Normally, the total yield is of the order of 50 mg, while yield differences are of the order of 1 mg to
10 mg.
6 As the shavers may be contaminated by touching them with the fingers, it is necessary for the
laboratory assistants and the testers to wear gloves (thin cotton gloves are suitable).
The accuracy of the measurements can be increased by working in a temperature and
humidity controlled room.
NOTE 7 — An additional advantage is that the skin condition of the testers can be standardized, if they wait
in the room for 5 min prior to shaving. This is particular impo rtant in summer, because then the testers may
suffer from excessive perspiration.
9.2.1 Left-right effects
In order to eliminate possible differences in the number of hairs on each side of the face,
the procedure is repeated using the shavers in reverse order.
Day 3
Similar to test day 1, this time using shaver B on the left side of the face and shaver A on
the right side of the face.
---------------------- Page: 16 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 - 23 -
Day 4
Similar to test day 2, this time taking the difference in mass between right and left side of
srIv - Msllv).
the face (M
NOTE - There may be an interval between day 2 and day 3 when the tester uses his own shaver.
9.2.2
Testing of more than two shaver types
If more than two shaver types are to be tested, each tester uses a reference shaver with
which the shavers are compared. In this case, if
n shaver types (n 1 to nx) are to be
assessed, the first tester uses a shaver of type n 1 as reference shaver (n 1
r) and shaves in
the following sequence:
n 1 n1, n 1 n2, n 1 r - n3, n 1 nx .
r - r - r -
The second tester uses a shaver of type n 2 as reference shaver (n2r) and shaves in the
following sequence:
r n2, n2r 173, n2 n4, n2r nx, n2r -
n2 - - r - -
Thus, each tester always starts with a combination of shavers of the same type (i.e. n 1 r
1, n2r - n2, n3r - n3, -n
etc . ) . The other combinations are tested in numerical order.
Each type is to be used an equal number of times as reference shaver.
9.3 Conversion from mass into average residual hair-stubble length
The mass of the hair is converted into average residual hair-stubble length. The individual
difference in hair mass is divided by the product of total amount of hairs on the face (n),
the density of the hairs (p) and the area of a cross section of the average hair (F).
NOTE 1 - During the development of this gravimetric method the average np F for a large panel of testers
was established. It was found that hair forms about 75 % of the total mass of the shavings collected. The
average growth of beard hair in 24 h is approximately 400 gm.
0,75
Thus: np F = (Msl + Msr) = 1,875 x 10-3 (M
al + Msr)
400
For calculation of the average residual hair-stubble length for the entire face, the
difference in hair mass between left and right side of the face is multiplied by 2. The
average residual hair-stubble length for the entire face is therefore:
2 (M -M
al sr) (Mal -Msr)
= 1 067
1,875 x 10-3 (Msl
+ Msr)
(Mal + Msr)
NOTE 2 - As an example, if Ms1 =
40,4 mg and Msr = 38,6 mg, the average residual hair-stubble length is:
1 067 (40,4 - 38,6) _ 24m
µ
(40,4 + 38,6)
---------------------- Page: 17 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 — 25 —
9.4
Statistical analysis
A statistical analysis is performed the basis of all individual M sl ll — Msrll and Msr ly — Msliv
data or on basis of all individual data:
IV — Msl iv)
(Msl° — Msr^^) (Msr
1 067 and 1 067
+ Msru) (M Iv + Msl iv)
(Mslia sr
If more than two shaver types are tested, an analysis of variance should be applied, as
described in 7.4, with the addition of the following sources of variation:
— variation due to sides s;
— variation due to the interaction p x s;
—
variation due to the interaction t(p) x s;
— variation due to the interaction n x s.
NOTES
1 If only two shavers are to be compared, to estimate whether the average difference in residual
hair-stubble length is significantly different from zero, a t-test of significance should be performed on basis
of the individual data ("left-right" effects eliminated per tester):
Msr n + Msriv — Msl iv)
n —
(Msl
1 067
(M 11+ M u + Msriv + Msliv)
51
Sr
2 The conversion from mass to average residual hair-stubble length may be omitted, and the statistical
analysis is carried out on the basis of the mass values.
The shaver types are to be ranked as described in 7.5.
---------------------- Page: 18 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 - 27 -
Type Type Type Type
E E A B
L R L R L R
after before after
shaving on day 0 shaving on day 1
Type Type
A B
L R L R L R L R
before after before after
shaving on day 2 shaving on day 3
Type Type
S S
L R L R
before after
shaving on day 4
Figure 1 - Schematic presentation of the test procedure
---------------------- Page: 19 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993 - 29 -
Annexe A/Annex A
(normative)
Questionnaires
---------------------- Page: 20 ----------------------
SIST EN 61254:1998
1254 © IEC: 1993
—31 —
QUESTIONNAIRE 1
PERSON
DAY DATE TYPE OWN
1 I
Circle the appropriate number in each case
SHAVING TIME (will the stopwatch)
Give the total time for shaving your face (including the use of soap, if applicable).
min.
s
1 I
CLOSENESS
not close at all very close
1) On cheek, chin, under the
9 10
nose
2) On the neck
1 2 4
5161718 9 110
1 3
SKIN IRRITATION
very painful not pain at all
1) Burning feeling or sore skin
after shaving?
1 2 516171819
2) Did you experience any other kind
no
of uncomfortable feeling (skin nicking, 0 yes 1
pulling of hairs, etc.)?
If yes, please specify below:
OVERALL JUDGEMENT ON SHAVING PERFORMANCE
very bad
very good
1) How do you rate the overall
1 2 3 4 5 6 7 8 9 10
shaving quality of your own razor
(time, closeness, skin comfort)?
---------------------- Page: 21 ----------------------
SIST EN 61254:1998
1254 ©IEC: 1993 - 33 -
QUESTIONNAIRE 2
PERSON DAY
DATE TYPE
Note the position of any adjustable control, other than the on/off switch or voltage
selector.
Circle the appropriate number in each case
SHAVING TIME
(with the stopwatch)
Give the total time for shaving your face.
min. s
CLOSENESS
not close at all very close
1) On cheek, chin, under the
1 2 3 4 I 5 I 6 7 8 9 10
nose
2) On the neck
1 2 3 4 5 6 9 10
3) Was it necessary to use the trimmer for the
no 0 yes 1
removal of incidental long hairs, e.g. in the neck
area?
SKIN IRRITATION
very painful no pain at all
1) Burning feeling or sore skin
after shaving
1 2 3 4 5 6 7 8 9 10
2) Did you experience any other
no 0 1
kind of uncomfortable feeling (skin yes
nicking, pulling of hairs, etc.)?
If yes, please specify below:
OVERALL JUDGEMENT ON SHAVING PERFORMANCE
very bad very good
1) How do you rate the overall
shaving quality of this test shaver
1 2 3 4 5 6 7 8 9 10
(time, closeness, skin comfort)?
----------------------
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.