oSIST prEN 168:2007

SLOVENSKI STANDARD
01-december-2007
2VHEQRYDURYDQMHRþL0HWRGHQHRSWLþQLKSUHVNXVRY
Personal eye-protection - Non-optical test methods
Persönlicher Augenschutz - Nichtoptische Prüfverfahren
Protection individuelle de l'oil - Méthodes d'essais autres qu'optiques
Ta slovenski standard je istoveten z: prEN 168
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2007
ICS 13.340.20 Will supersede EN 168:2001
English Version
Personal eye-protection - Non-optical test methods
Persönlicher Augenschutz - Nichtoptische Prüfverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 85.
If this draft becomes a European Standard, CEN 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.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 168:2007: E
worldwide for CEN national Members.

Contents
page
Foreword.4
1 Scope .5
2 Normative references .5
3 Test for increased robustness .5
3.1 Unmounted oculars .5
3.2 Complete eye-protectors and frames .7
4 Test for minimum robustness of oculars with filtering effect and cover plates .8
4.1 Apparatus .8
4.2 Procedure .8
5 Test for stability at elevated temperature .9
5.1 Apparatus .9
5.2 Procedure .9
6 Test for resistance to ultraviolet radiation.10
6.1 Apparatus .10
6.2 Procedure .10
7 Test for resistance to ignition .10
7.1 Apparatus .10
7.2 Procedure .10
8 Test for resistance to corrosion.10
9 Test for resistance to high-speed particles and resistance to high speed particles at extremes
of temperature.11
9.1 Apparatus .11
9.2 Procedure .11
10 Test for protection against molten metals .12
10.1 Test for non-adherence of molten metals .12
10.2 Test for area of coverage of face shields.14
11 Test for resistance to penetration by hot solids .16
11.1 Apparatus .16
11.2 Procedure .16
12 Test for protection against droplets and liquid splashes.17
12.1 Test for protection against droplets (for goggle type eye-protectors) .17
12.2 Test for protection against liquid splashes (for face-shields) .17
13 Test for protection against large dust particles .17
13.1 Apparatus .17
13.2 Procedure .19
13.3 Evaluation.19
14 Test for protection against gases and fine dust particles.20
14.1 Apparatus .20
14.2 Procedure .21
14.3 Evaluation.21
15 Test for resistance to surface damage by fine particles .21
15.1 Apparatus .21
15.2 Samples .22
15.3 Procedure .22
15.4 Evaluation.22
16 Test for resistance to fogging of oculars.24
16.1 Apparatus .24
16.2 Samples .25
16.3 Procedure and evaluation.25
17 Head-form.27
18 Assessment of Field of Vision .29
19 Assessment of lateral protection.30
19.1 Apparatus .30
19.2 Procedure .30
19.3 Evaluation.30
20 Test for protection against radiant heat.31
20.1 Principle.31
20.2 Apparatus .31
20.3 Procedure .32
Annex A (informative) Uncertainty of measurement and results interpretation.34
A.1 Test report and uncertainty of measurement .34
Annex B (informative) Significant technical changes between this European Standard and the
previous edition .36
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other
provisions of EU Directives.37

Foreword
This document (prEN 168:2007) has been prepared by Technical Committee CEN/TC 85 “Eye protective
equipment”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 168:2001.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA which is an integral part of this document.
Annex B provides details of significant technical changes between this European Standard and the previous
edition:
1 Scope
This European Standard specifies non-optical test methods for eye-protectors, the requirements for which are
contained in other European Standards.
Alternative test methods may be used if shown to be equivalent.
The optical test methods are given in prEN 167.
A definition of terms is given in EN 165.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 165, Personal eye-protection — Vocabulary.
prEN 166:2007, Personal eye-protection — Specifications.
prEN 167:2007, Personal eye-protection — Optical test methods.
EN 136:1998, Respiratory protective devices - Full face masks - Requirements, testing, marking.
EN ISO 6942:2002, Protective clothing - Protection against heat and fire - Method of test : evaluation of materials
and material assemblies when exposed to a source of radiant heat.
ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of
openings.
3 Test for increased robustness
New specimens shall be used for this test.
3.1 Unmounted oculars
3.1.1 Apparatus
The support for the ocular (see Figure 1) shall be a steel or rigid plastic cylinder with an internal diameter of
(35,0 ± 0,1) mm and an outside diameter of (41,0 ± 0,1) mm. The cylinder shall be inserted into, or be an integral
part of a steel base. The ocular shall be cushioned by a silicone seating ring firmly attached to the top of the tube.
This seating ring shall be made of silicone rubber of (40 ± 5) I.R.H.D and shall have an inside diameter of
(35,0 ± 0,4) m and cross sections of 3 mm x 3 mm nominal dimensions.
The combined mass of the support shall be at least 12 kg.
A load ring of mass (250 ± 5) g is placed on the ocular. The ring has an inside diameter the same as that of the
support tube, and any convenient outside diameter. A silicone seating ring having the same dimensions and
hardness as the one attached to the top of the support tube is placed between the load ring and the ocular. A piece
of carbon paper on a piece of white paper is placed at the base of the 1,5 mm deep cavity in the ocular support
(see Figure 1).
For curved oculars with a cylindrical component, the test support tube and load ring shall be curved to conform to
the concave and convex surfaces of the ocular respectively, and the dimensions of 3 mm and 4,5 mm shall apply to
the deepest point of the circular support. (See Figure 1).
If the ocular is of insufficient dimensions to enable its entire periphery to be adequately supported, suitable adaptor
sleeves shall be used.
3.1.2 Procedure
Centre the intended points of impact of the ocular on the support tube. Adjust the apparatus so that a 22 mm
+0
nominal diameter steel ball of 43 g minimum mass falling from (1,3 ) m strikes the ocular within a 5 mm radius
−0,03
from the centre of the support tube. This height will provide an impact speed of approximately 5,1 m/s.
Impacts shall be directed at the visual centre(s) of the oculars. For unmounted oculars covering one eye and for
which the visual centre cannot be established, then the geometric centre shall be used.
NOTE Visual centre is as defined in EN 166.
The impacts are carried out in the following conditions:
a) with the ocular heated to (55 ± 2) °C and maintained at this temperature for at least 1 h;
b) with the ocular cooled to a temperature of (-5 ± 2) °C and maintained at this temperature for at least 1 h.
New oculars shall be used for each individual impact and for each temperature condition. The impact shall be
applied within 30 s of temperature conditioning.
The test shall be carried out at (23 ± 5) °C.

Dimensions in millimetres (nominal unless toleranced)

Key
1 Supporting plate (12 kg minimum)
2 Silicone seating rings
3 Ocular
4 Load ring (250 ± 5) g
5 Carbon paper on white paper
Figure 1 — Holding device for oculars for the increased robustness test
3.2 Complete eye-protectors and frames
3.2.1 Apparatus
3.2.1.1 Appropriate head-form, as defined in clause 17.
3.2.1.2 A device enabling a 22 mm nominal diameter steel ball of 43 g minimum mass to be projected at a
specified point on the eye-protector at a speed of approximately 5,1 m/s.
3.2.2 Procedure
The eye-protector to be tested shall be placed on the appropriate head-form in the position corresponding to
normal use.
If the frame only is to be assessed then oculars meeting the requirements of 3.1 (increased robustness) shall be
fitted to the frame.
A sheet of carbon paper on top of a sheet of white paper is attached to the head-form behind the eye-protector.
The head-form and eye-protector assembly is positioned in the test apparatus.
The ball is projected at the points of impact defined in 3.2.3.
For spectacles with no lateral protection the ball shall strike the sidearm within the prescribed lateral protection area
on a vertical plane through the impact centre. (See 3.2.3).
The impacts are carried out in the following conditions:
a) with the eye-protector heated to (55 ± 2) °C and maintained at this temperature for at least 1 h;
b) with the eye-protector cooled to a temperature of (-5 ± 2) °C and maintained at this temperature for at least 1 h.
New eye-protectors shall be used for each individual point of impact and for each temperature condition. The
impact shall be applied within 30 s of temperature conditioning.
The tests shall be conducted at an ambient temperature of (23 ± 5) °C.
3.2.3 Points of impact
There are four impact points, and these are defined with respect to the head-form rather than the eye-protector.
The ball is aimed at these impact points with the eye-protector mounted in the normal use position.
The impact points shall be considered as any single point within a 10 mm radius of one of four impact centres.
These impact centres are denoted by an asterisk (*) in Figure 11.
With respect to the test schedule contained in EN 166, the four impact points are defined as follows:
1. the left eye frontal;
2. the right eye frontal;
3. the left eye side;
4. the right eye side.
For frontal impacts at the two eye centres the ball is projected normal to the vertical axis of the head-form and
parallel to its optical axis along each line of sight.
For lateral impacts the head-form is rotated about its vertical axis by 90° (left and right) from the frontal impact
position.
The head-form may be moved horizontally and vertically to select any single impact point lying within 10 mm of the
specified impact centres.
As stated in 3.2.2, new eye-protectors shall be used for each individual impact.
4 Test for minimum robustness of oculars with filtering effect and cover plates
New specimens are used for this test.
4.1 Apparatus
See Figure 2.
4.1.1 Loading device
A steel ball of 22 mm nominal diameter is fastened to the lower end of a tube, whose length is 70 mm nominal.
The total loading mass is such that the force acting on the ocular is (100 ± 2) N.
4.1.2 Specimen support
The support for the ocular (see Figure 2) shall be a steel cylinder with an internal diameter of (35,0 ± 0,1) mm and
an outside diameter of (41,0 ± 0,1) mm. The cylinder shall be inserted into, or be part of, a steel base.
The specimen is placed between two seating rings made of silicone rubber of (40 ± 5) I.R.H.D. having an inside
diameter of (35,0 ± 0,4) mm and cross sections of 3 mm x 3 mm nominal dimensions. The silicone seating rings are
fixed to the steel supporting plate and the load ring respectively.
If the specimen ocular is of insufficient dimensions to enable its entire periphery to be adequately supported,
suitable adaptor sleeves shall be used.
The load ring shall have a mass of (250 ± 5) g. By its weight, it presses the upper silicone seating ring against the
upper surface of the specimen.
A sheet of carbon paper on top of a sheet of white paper is placed on the supporting steel plate at the base of
the 1,5 mm deep cavity.
4.2 Procedure
4.2.1 The test is carried out at (23 ± 5) °C.
4.2.2 Align the central vertical axis of the loading tube with that of the specimen support.
4.2.3 Position the specimen on the support with the ”eye side” downwards and place the load ring on the
specimen. For curved oculars with a cylindrical component the supporting plate and the load ring are curved to
conform to the surface of the ocular, and the dimensions of 3 mm and 4,5 mm shall apply to the deepest point of
the circular support.
4.2.4 Adjust the position of the specimen such that the load ring axis (4.2.2) passes through the visual centre of
the specimen. If the visual centre cannot be established the geometric centre shall be used.
NOTE Visual centre is as defined in EN 166.
4.2.5 The loading mass is lowered on to the ocular at a speed not exceeding 400 mm/min. The force
of (100 ± 2) N is maintained for (10 ± 2) s. The loading mass is then removed.
Dimensions in millimetres (nominal unless toleranced)

Key
1 Supporting plate
2 Silicone seating rings
3 Guiding block
4 Loading mass (100 ± 2) N
5 Steel ball
6 Load ring (250 ± 5) g
7 Carbon paper on white paper
8 Ocular
Figure 2 — Apparatus for minimum robustness (static deformation) test
5 Test for stability at elevated temperature
New specimens are used for this test.
5.1 Apparatus
Oven, capable of maintaining a temperature of (55 ± 2) °C.
5.2 Procedure
Place the specimen in a position corresponding to normal use, in the oven for (60 ± 5) min at a temperature of
(55 ± 5) °C. Then remove it and allow to stabilise at (23 ± 5) °C for a minimum of 60 min prior to visual examination.
6 Test for resistance to ultraviolet radiation
6.1 Apparatus
Fused-silica envelope high-pressure xenon lamp. The power of the lamp shall be between 400 W and 500 W, with
a preferred value of 450 W. The spectral transmittance of the lamp envelope shall be at least 30 % at 200 nm.
NOTE Suitable lamp references are XBO-450 W/4 and CSX-450 W/4. These lamps produce UV radiation with an
appreciable amount of UVC radiation. This is appropriate, since industrial processes (for example, welding) produce appreciable
amounts of UVC radiation.
WARNING Precautions should be taken against potential generation and build up of ozone.
6.2 Procedure
New specimens are used for this test. The test equipment is operated within an environment of temperature
(23 ± 5) °C.
Expose the external face of the ocular to radiation from a fused silica envelope high-pressure xenon lamp (see 6.1).
The angle of incidence of the radiation on the specimen surface shall be essentially perpendicular. The distance
from the axis of the lamp to the nearest point on the sample shall be (300 ± 10) mm. The exposure time shall be
(50 ± 0,2) h at a lamp power of 450 W.
New lamps shall be burned in for (50 ± 0,2) h.
7 Test for resistance to ignition
7.1 Apparatus
7.1.1 Steel rod, (300 ± 3) mm long and 6 mm nominal diameter with end faces which are flat and perpendicular
to its longitudinal axis.
7.1.2 Heat source.
7.1.3 Thermocouple and temperature indicating device.
7.1.4 Timer, capable of measuring an elapsed time of 10 s with an uncertainty of ± 0,1 s.
7.2 Procedure
Heat one end of the steel rod over a length of at least 50 mm to a temperature of (650 ± 20) °C. Measure the
temperature of the rod by means of the thermocouple attached at a distance of (20 ± 1) mm from the heated end of
the rod. Press the heated face of the rod (long axis vertically) against the surface of the test sample (the contact
force being equal to the weight of the rod) for a period of (5,0 ± 0,5) s, and then remove it.
Carry out the test on all externally exposed parts of the eye-protector, except elastic headbands and textile edging.
Carry out a visual inspection during the test in order to establish whether the test samples ignite or continue to
glow.
The tests are performed in an environment of temperature (23 ± 5) °C.
8 Test for resistance to corrosion
Remove all contamination, particularly oil and grease from the metal parts of the specimen.
Immerse the specimen for (15 ± 1) min in a boiling, aqueous, (10,0 ± 0,5) % by mass solution of sodium chloride.
Remove the specimen from this solution and immerse immediately in a (10,0 ± 0,5) % by mass aqueous solution of
sodium chloride at room temperature for (15 ± 1) min.
Remove from this solution and without wiping off the adhering liquid, leave to dry for (24 ± 1) h at (23 ± 5) °C. Rinse
in lukewarm water and leave to dry before inspecting.
9 Test for resistance to high-speed particles and resistance to high speed particles at
extremes of temperature
New specimens shall be used for this test and each specimen shall only be subjected to one impact.
9.1 Apparatus
9.1.1 Head-form
Appropriate head-form, as defined in clause 17.
9.1.2 Propulsion equipment
The apparatus shall be capable of imparting known speeds of up to 195 m/s to a 6 mm nominal diameter steel ball
of 0,86 g minimum mass.
NOTE 1 The apparatus consists fundamentally of a barrel or tube of sufficient length to ensure a reproducible exit speed of
the steel ball, with a breech or loading mechanism ensuring that the ball is in a given position in relation to the tube or barrel
end, and of a spring or compressed gas to provide propulsion.
The apparatus also includes a means of calibrating or measuring the exit speed of the ball; because of the speed
and distances involved, a timing indicator, recording in multiples of not greater than 10 µs is required.
The measurement of speed should be made as near as possible to the point of impact. The end of the barrel or
tube should be protected against ricochets.
The area surrounding the test specimen, the head-form and the barrel or tube should be enclosed.
NOTE 2 The tube length should be chosen to ensure that the required speed for the ball is achieved.
NOTE 3 For the time measurement, a method using an electronic timer operated by photoelectric cells through amplifiers
has been found suitable.
The distance between the sensing elements should not exceed 150 mm.
9.2 Procedure
9.2.1 Resistance to high speed particles
Place the eye-protector to be tested on the head-form in the position corresponding to normal use and with the
tension of the headband, if fitted, adjusted according to the manufacturer's instructions.
Insert a sheet of carbon paper on top of a sheet of white paper, between the eye-protector and the head-form.
Position the eye-protector/head-form assembly in front of the propulsion equipment, the point of impact being not
more than 250 mm from the exit end of the speed sensing equipment.
Project the steel ball at one of the speeds specified in EN 166. The points of impact are the same as those defined
for the increased robustness test in 3.2.3. The ambient temperature shall be (23 ± 5) °C.

9.2.2 Resistance to high speed particles at extremes of temperature
The procedure is as 9.2.1 but with the impacts carried out under the following conditions:
a) with the ocular heated to (55 ± 2) °C and maintained at this temperature for at least 1 h;
b) with the ocular cooled to a temperature of (-5 ± 2) °C and maintained at this temperature for at least 1 h.
New oculars shall be used for each individual impact and for each temperature condition. The impact shall be
applied within 30 s of temperature conditioning
10 Test for protection against molten metals
10.1 Test for non-adherence of molten metals
10.1.1 Principle
Molten metal is ejected onto an eye-protector specimen to test for non-adherence of molten metals.
10.1.2 Apparatus
10.1.2.1 Ejection system, fitted with an ejection head dished in the centre to accommodate a crucible of molten
metal. The energy of ejection and the positioning of the fixed stop platform shall be such that the molten metal,
consisting of a mass of (100 ± 5) g of grey iron (see 10.1.2.6), can be projected upwards from the ejection head to
a height of (250 ± 25) mm above the position where the surface of the sample is to be tested.
An example of a suitable form of apparatus is shown in Figure 3.
10.1.2.2 Fixed stop platform, mounted above the ejector head and provided with a central opening large
enough to allow the charge of molten metal to pass through (75 mm nominal diameter).
10.1.2.3 Metal seating ring, fixed to the stop platform and incorporating a central opening of 75 mm nominal
diameter to allow the charge of metal to pass through. The seating ring supports the test specimen.
10.1.2.4 Metal cylindrical clamping ring, with 75 mm nominal diameter opening combined, if necessary, with an
additional clamping weight to give a total nominal clamping mass of 7,5 kg.
NOTE If necessary, the surfaces of the seating ring and clamping ring are curved to conform to the specimen.
10.1.2.5 Ceramic crucible of approximately 60 ml capacity, 40 mm nominal depth, 2 mm nominal thickness and
58 mm nominal lip diameter.
NOTE When ejected, the crucible and its contents are projected onto the specimen.
10.1.2.6 Grey iron (100 ± 5) g.
10.1.2.7 Aluminium (38 ± 2) g.
10.1.2.8 Protective housing, enclosing the whole assembly to ensure safe operation.
Key
1 Ejector cylinder 7 Clamping weight (7,5 kg nominal)
2 Spring release trigger 8 Protector seating jig
3 Crucible 9 Stop platform
4 Protector 10 Ejector head
5 Clamping ring 11 Ejector spring
6 Protective housing 12 Release pedal
Figure 3 — Example of apparatus for assessment of non adherence of molten metal
10.1.3 Procedure
Mount the eye-protector or specimen above the opening so that the area being tested is immediately above the
centre of the ejector head. Secure with the clamping ring weight, or rubber/elastic straps, etc.
Load the ejector head with a crucible containing (100 ± 5) g of grey iron at a temperature of (1 450 ± 20) °C.

Release the catch, so that the ejector head is driven vertically upwards until it strikes the stop platform and ejects
the crucible of molten metal on to the eye-protector.
Remove the eye-protector and examine it to see if any molten metal has adhered to any part of it. Repeat the test
using a second eye-protector and using (38 ± 2) g of aluminium at (750 ± 20) °C.
The tests are conducted at an ambient temperature of (23 ± 5) °C.
Report if any molten metal has adhered to any part of the eye-protector.
10.2 Test for area of coverage of face shields
10.2.1 Principle
A face-shield is mounted on a head-form, and the extent of coverage is assessed by observing the assembly as the
head-form is rotated about its horizontal and vertical axes.
NOTE The observation method describes the use of a laser beam; alternatively, observations may be made by viewing
through a cylindrical tube fitted with cross-wires.
10.2.2 Apparatus
10.2.2.1 Appropriate head-form, as defined in clause 17. Inscribed on the head-form is a rectangle ABCD
enclosing the eye-region, as indicated by the dotted lines shown in Figure 11.
10.2.2.2 Support frame, (see Figure 4) which enables the head-form to be rotated about a horizontal axis A and
a vertical axis B. The head-form can be moved sideways along axis A.
NOTE Axis A passes through the centre of the pupils of the head-form. Axis B is the vertical axis through the nasion.
Axis C is the axis of the laser.
10.2.2.3 Visible laser with maximum beam diameter 5 mm and which may move vertically up and down but
cannot rotate about its horizontal or vertical axis.
10.2.3 Procedure
The apparatus is arranged as shown in Figure 4 such that the axis of rotation A and the axis C intersect on the
surface of the head-form at the mid-point of a line joining the eye centres.
The face-shield is fitted to the head-form in accordance with the manufacturer's instructions.
The laser beam is projected at all relevant points within the eye-region rectangle with the head-form set in the
following positions:
 facing forwards and rotated (45 ± 1)° forwards about horizontal axis A;
 facing forwards and rotated (45 ± 1)° backwards about horizontal axis A;
 Rotated (90 ± 1)° to the left about vertical axis B and rotated (45 ± 1)° forwards about horizontal axis A;
 Rotated (90 ± 1)° to the left about vertical axis B and rotated (45 ± 1)° backwards about horizontal axis A;
 Rotated (90 ± 1)° to the right about vertical axis B and rotated (45 ± 1)° forwards about horizontal axis A;
 Rotated (90 ± 1)° to the right about vertical axis B and rotated (45 ± 1)° backwards about horizontal axis A.
10.2.4 Evaluation
Report if during any of the observations the laser beam makes direct contact with any point on the eye-region
rectangle without being intercepted by the face-shield, in which case the area of coverage is considered to be
insufficient.
NOTE Face-shield deleted for clarity.
Key
1 Laser beam or cylindrical tube fitted with cross-wires
2 Rectangle enclosing the eye region (see Figure 11)
3 Head-form
4 Support frame
Figure 4 — Apparatus for assessment of area of coverage of face shields
11 Test for resistance to penetration by hot solids
11.1 Apparatus
NOTE An example of a suitable apparatus is shown in Figure 5. It consists of:
11.1.1 Metal cylinder to support the specimen.
11.1.2 Funnel of heat insulating material to centre a steel ball on the specimen.
11.1.3 Heat source, capable of maintaining the steel ball at a temperature of (900 ± 20) °C.
11.1.4 Steel ball of 6 mm nominal diameter.
11.1.5 Timer, capable of measuring an elapsed time of 10 s with an uncertainty of ± 0,1 s.
11.2 Procedure
The tests are conducted at an ambient temperature of (23 ± 5) °C.
Place the specimen to be tested on the cylinder and the funnel on top of the specimen. Heat the steel ball to
(900 ± 20) °C. Withdraw the ball from the heat source and drop it as quickly as possible into the funnel.
Start the timer. If the ball drops, indicating complete penetration, record the time it has taken to penetrate.
Dimensions in millimetres (nominal unless toleranced)

Figure 5 — Apparatus for testing resistance to penetration of hot solid
12 Test for protection against droplets and liquid splashes
12.1 Test for protection against droplets (for goggle type eye-protectors)
12.1.1 Apparatus
12.1.1.1 Appropriate head-form, as described in clause 17.
12.1.1.2 Hand operated atomiser, producing fine droplets (not mist).
12.1.1.3 White blotting paper of sufficient size to protrude at least 20 mm all around the periphery of the eye-
protector under test. The blotting paper is marked with two circles of (52 ± 1) mm or (48 ± 1) mm diameter at a
centre distance of (64 ± 1) mm or (54 ± 1) mm respectively, corresponding to the ocular areas of the appropriate
size of head-form specified in clause 17.
12.1.1.4 Detecting solution, prepared by dissolving (5,0 ± 0,5) g phenolphthalein in (500 ± 50) ml ethanol and
adding (500 ± 50) ml of water, stirring constantly (filter if a precipitate forms) to obtain (1,0 ± 0,1) l of solution.
12.1.1.5 Absorbent cotton lint (surgical dressing), mass per unit area approximately 185 g/m².
12.1.1.6 Spray solution, 0,1 mol/l solution of sodium carbonate in water.
12.1.2 Procedure
Cover the ocular region of the head-form with layers of cotton lint then blotting paper previously dipped in the
detecting solution 12.1.1.4.
Fit the protector onto the head-form in the normal wearing position so that the blotting paper protrudes all around its
periphery by at least 20 mm. Adjust the headband to a normal degree of tension. Adjust the number of layers of lint,
as necessary, to ensure a good seal between the eye-protector and the head-form.
Spray the mounted protector with the spray solution (12.1.1.6) holding the atomiser at a distance of approximately
600 mm from the head-form, spraying from all directions. Spraying is carried out with a spray solution volume
of 5 ml – 10 ml until the blotting paper around the periphery of the eye-protector turns a uniform crimson colour.
The blotting paper shall not be over-wetted to cause it to drip.
The tests are conducted at an ambient temperature of (23 ± 5) °C.
12.1.3 Evaluation
Observe whether the blotting paper shows a crimson colouration within either of the two circles indicating that the
spray solution has penetrated the eye-protector.
12.2 Test for protection against liquid splashes (for face-shields)
Carry out the procedure given in 10.2 to determine if the face-shield covers the defined ocular area.
13 Test for protection against large dust particles
13.1 Apparatus
13.1.1 Dust-chamber, (see Figure 6), glass fronted, with nominal internal dimensions 560 mm × 560 mm
× 560 mm, with a hopper-shaped bottom and a tightly sealed, hinged lid. A blower is connected to the bottom of the
inverted hopper capable of delivering approximately 2,8 m /min at a pressure of 2 250 Pa. A suitable agitator,
capable of inducing swirling in the air stream from the blower should be arranged immediately above the air inlet.
The dust-chamber outlet is connected to the blower inlet. The chamber is fitted with bars to support a head-form,
the spacing of the bars allows for free circulation of the dust within the chamber.
13.1.2 Test dust, (1 000 ± 50) g of pulverized coal shall be placed inside the dust-chamber; the coal dust shall
have the following particle size distribution:
Table 1 – Particle size distribution of test dust
Nominal mesh dimension of sieve (see ISO 565) Minimum percentage pass
mm %
0,300 95
0,150 85
0,090 40
0,040 3
13.1.3 Appropriate head-form, as described in clause 17. It shall be covered with layers of absorbent cotton lint
(surgical dressing) the approximate mass per unit area of which is 185 g/m . This lint shall be covered by a sheet of
moist white blotting paper on which have been marked in pencil two circles (52 ± 1) mm or (48 ± 1) mm in diameter,
the horizontal distance between centres being (64 ± 1) mm or (54 ± 1) mm respectively corresponding to the ocular
areas of the appropriate size of head-form specified in clause 17.
13.1.4 Photoelectric reflectometer, incorporating a light source radiating energy within the visible range and a
detector only sensitive in the visible range, with peak sensitivity in the green part of the spectrum. An example of a
suitable arrangement is shown in Figure 7.
13.1.5 White comparison sample
Any white material capable of retaining a constant reflectance for the duration of the test, e.g. pot-opal glass,
ceramic tile, pressing of barium sulfate, magnesium carbonate block, several thicknesses of clean, dry white paper.
13.2 Procedure
The tests are conducted at an ambient temperature of (23 ± 5) °C. Soak the blotting paper and then shake off any
excess water Using the photoelectric reflectometer (13.1.4), measure the reflectance of each of the two circles on
the wetted blotting paper, relative to the white comparison sample (13.1.5) and calculate the mean. Mount the eye-
protector on the head-form (13.1.3). Adjust the number of layers of cotton lint, as necessary, to ensure a good seal
between the eye-protector and the head-form. Place this assembly in the dust chamber (13.1.1) and operate the
blower for (60 ± 2) s. Allow the dust chamber to remain undisturbed for (30 ± 2) min, then open it and remove the
blotting paper from the head-form, being careful not to allow more dust to be deposited on the areas of the circles.
Within 2 min, re-measure the reflectance of the two circles relative to the white comparison sample and again
calculate the mean.
13.3 Evaluation
Calculate the ratio of the mean reflectance after exposure in the dust chamber to the mean reflectance before
exposure and express this ratio as a percentage.

Key
1 Eye-protector
2 Dust chamber (560 mm x 560 mm x 560 mm nominal dimensions)
3 Head-forms
4 Bars
5 Dust collector
6 Blower
Figure 6 — Test apparatus for protection against large dust particles
Key
1 Test paper
2 Photoreceptor
3 Mercury vapour lamp
4 Lens
5 Interference filter (λ = 546 nm nominal)
Figure 7 — Example of photoelectric reflectometer
14 Test for protection against gases and fine dust particles
14.1 Apparatus
14.1.1 Appropriate head-form, as defined in clause 17.
14.1.2 Gas-chamber, a gas-tight glass-fronted enclosure, with nominal internal dimensions
560 mm × 560 mm × 560 mm and a tightly sealing, hinged lid. The gas-chamber shall be ventilated by means of a
small blower with a typical capacity of 1,4 m /min and a vent pipe leading to a suitable removal/treatment system.
14.1.3 Supply of ammonia gas, for example by bubbling air through a washing bottle containing a concentrated
solution of ammonia (б = 0,9 g/ml approximately) or by using a cylinder of ammonia. The outlet from the generator
or cylinder is connected to the gas-chamber.
14.1.4 Test paper, white blotting paper, of sufficient size to protrude at least 20 mm all around the periphery of the
eye-protector under test.
14.1.5 Detecting solution, prepared by dissolving (5,0 ± 0,5) g of phenolphthalein in (500 ± 50) ml of ethanol and
adding (500 ± 50) ml of water with constant stirring (filtering if a precipitate forms) to obtain (1,0 ± 0,1) l of solution.
14.1.6 Absorbent cotton lint (surgical dressing), approximately 185 g/m mass/unit area.

14.2 Procedure
Mount the eye-protector on the head-form symmetrically over the test paper which has been previously dipped in
the solution according to 14.1.5. The test paper rests on a number of layers of cotton lint. Adjust the number of
layers of cotton lint, as necessary, to ensure a good se
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