KENYA STANDARD             DKS  2887 : 2019  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
Wood based panels – Melamine faced boards for 
interior uses – Test methods’  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
© KEBS 20 19                        First Edition  2019 
 
  
   © KEBS 201 9 —  All rights reserved  ii TECHNICAL COMMITTEE REPRESENTATION  
The following organizations were represented on t he Technical Committee:  
 
1. Elle Interior Designers Ltd  
2. Kenya Industrial Research And Development Institute (KIRDI)   
3. University of Nairobi  
4. Consumer information network  
5. Global Hardware limited  
6. PG Bison  
7. Timsales Limited  
8. University o f Eldoret  
9. KEFRI  
10. Kenya Wood Preservation Association  
11. Alogo Enterprises  
12. Kenya Bureau of Standards — Secretariat  
 
 
 
REVISION OF KENYA STANDARDS  
 
In order to keep abreast of progress in industry, Kenya Standards shall be regularly reviewed. S uggestions 
for improvements to published standards, addressed to the Managing Director, Kenya Bureau of Standards, 
are welcome.  
 
 
 
 
 
© Kenya Bureau of Standards, 20 15 
Copyright. Users are reminded that by virtue of Section 25 of the Copyright Act, Cap. 12 of 2001  of the Laws of Kenya, copyright 
subsists in all Kenya Standards and except as provided under Section 26 of this Act, no Kenya Standard produced by Kenya Bure au of 
Standards may be reproduced, stored in a retrieval system in any form or transmitted  by any means without prior permission in writing 
from the Managing Director . 
 
 
 
  KENYA STANDARD                DKS  2887: 2019  
© KEBS 201 8 — All rights reserved  iii  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Wood based  panels – Melamine faced boards 
for interior uses – Test methods’  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
KENYA BUREAU OF STANDARDS (KEBS)  
 
Head Office:  P.O. Box 54 974, Nairobi -00200, Tel.: (+ 254 020 ) 605490, 602350, Fax: (+254 020)  604031  
E-Mail: info@kebs.org,  Web:http://www.kebs.org  
 
Coast Region           Lake Region           Rift Valley Region  
P.O. Box 99376, Mombasa -80100      P.O. Box 2949, Kisumu -40100         P.O. Box 2138, Nakuru -20100  
Tel.: (+254  041) 229563, 230939/40     Tel.: (+254 057) 23549, 22396       Tel.: (+254 051) 210553, 210555  
Fax: (+254  041) 229448         Fax: (+254 057) 21814  
 
  
   © KEBS 201 9 —  All rights reserved  iv Foreword  
 
This Kenya Standard was prepared by the Plywood and boa rds Technical committee and under the 
guidance of the Standards Projects Committee, and it is in accordance with the procedures of the Bureau.  
 
In the preparation of this standard, reference was made to the following publication:  
EN 14323 Wood based panels  – Melamine faced boards for interior uses – Test methods  
 
 DKS  2887: 2019  
© KEBS 201 9 — All rights reserved  1 Wood based panels – Melamine faced boards 
for interior uses – Test methods  
 
1 Scope   
This Kenyan Standard specifies test methods for the determination of characteristics  of melamine faced 
boards (MFB) as defined in KS 2886 . 
 
2 Normative references    
The following referenced documents are indispensable for the application of this Kenya Standard. For 
dated references, only the edition cited applies. For undated references, t he latest edition of the 
referenced document (including any amendments) applies.  
KS 2886  Wood -based panels — Determination of dimensions of boards — Part 1:  Determination of 
thickness, width and length  
ISO 4586 -2:2018 High -pressure decorative laminates (H PL, HPDL) -- Sheets based on thermosetting 
resins (usually called laminates) -- Part 2: Determination of properties   
ISO 2813, Paints and varnishes — Determination of gloss value at 20°, 60° and 85° (ISO 2813)  
ISO 3668, Paints and varnishes — Visual compar ison of the colour of paints (ISO 3668)  
ISO 4892 -2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon -arc lamps 
(ISO 4892 -2:2013)  
ISO 9352, Plastics — Determination of resistance to wear by abrasive wheels  
3  Test pieces  
The test pieces for the following tests shall be taken at least 150 mm from the edge of the product. When 
needed, the longitudinal or transverse direction of the decorative surface shall be specified by the 
manufacturer for the tests on the products.  
4 Conditi oning of test pieces  
Unless specified otherwise for the individual tests, the test pieces shall be tested in the received state.  
In cases of dispute or for type approval, the test pieces shall be conditioned in an atmosphere of (23 ± 2) 
°C and (50 ± 5) % r elative humidity to constant mass prior to testing.  
 
5 Test methods  
5.1 Dimensions (thickness, length and width)  
These properties shall be determined in accordance with KS 2886  
5.2 Flatness  
5.2.1  Principle  
Flatness is determined by measuring the maximal deviation of the b oard surface from a metal straight 
edge placed at two selected positions parallel to the long and short edges of the board or panel.  
5.2.2  Apparatus  
Straight edge, of (1 000 ± 1) mm length, with dial indicator gauge (comparator) graduated to permit a 
reading acc uracy of 0,1 mm.  
5.2.3  Test pieces  
The test piece shall be the complete board under test, as received, stored in the conditions recommended 
by the manufacturer.  
5.2.4  Procedure  
Place the board in a vertical position free from restraint with one long edge resting on an  essentially 
horizontal floor. Place the flatness gauge on the concave surface at various positions. At each position, 
measure the greatest distance between board surface and the flatness gauge with an accuracy of 0,1 mm.  
5.2.5   
The result of the test is the hig hest recorded reading on the dial gauge in millimetres to the nearest  
 
   © KEBS 201 9 —  All rights reserved  2 0,1 mm.  
5.3 Edge damage  
5.3.1  Principle  
Edge damage is determined by placing a graduated mask or tape measure on the board or panel under 
test and measuring the size of chips of paper removed from  the edges.  
5.3.2  Apparatus  
A metal tape measure or mask graduated in divisions of 1 mm.  
5.3.3  Test pieces  
The test piece is the board or panel as received.  
5.3.4  Procedure  
The test piece is laid level on a protective surface. Loose surface contamination is to be removed us ing a 
soft brush. Using the metal tape measure or the mask the size of the chip is measured at right angles to 
the board edge, across the chip towards the centre of the board.  
5.3.5  Expression of results  
Record the dimensions of the largest chip of paper removed  to the nearest millimetre (mm).  
5.4 Surface defects  
5.4.1  Principle  
Inspection of boards for surface appearance under standardized conditions of lighting and viewing. 
Surface defects are larger than 0,8 mm2 and those that can be identified when the surface texture is 
viewed from a distance of 0,7 m and at an angle about of 45°.  
5.4.2  Apparatus  
The light source shall provide a diffused illumination of (1 200 ± 400) lx over the whole area. This may 
either be diffused daylight or be diffused artificial light. The daylight sh all be unaffected by surrounding 
trees, etc. When artificial daylight is used, it shall have a correlated colour temperature of (5 000 to 6 500) 
K and a Ra greater than 92, by using a colour matc hing booth in accordance with ISO 3668.  
A convenient distance  of the lights from the inspection table is approximately 1,5 m.  
5.4.3  Test pieces  
The test piece shall be the board under test, as received.  
5.4.4  Procedure  
Place the board, decorative face uppermost, on the inspection table and wipe it free of any loose 
contaminatio n, if necessary, with a soft cloth and any suitable cleaning agent if necessary. Inspect it from 
the distance required (specified in 5.4.1) for defects such as smudges, smears, finger -prints, scratches, 
foreign particles, damage or any other form of blemis h evident within the decorative surface.  
In case of cut to size panels the inspection shall be performed on the edges too.  
The evaluation of the total area of spot -type defects in square millimetres and of the total length of hair - 
like defects in millimet res may be carried out with the help of the Tappi Size Estimation Chart1) or with an 
equivalent system. In case of dispute the inspection shall be carried out by three observers using the 
Tappi Chart or an equivalent system.  
The inspector shall have normal  vision, corrected if necessary. No magnifying glass shall be used in 
viewing the sheet. In cases of doubt or dispute, three observers are required for the visual assessment. All 
observers shall have good colour vision. In case of three observers, the repo rted rating for the test surface 
shall be the average to the nearest nominal value.  
5.4.5  Expression of results  
Record all defects identifying type, number and size of defects and sum up surfaces and length.  
The admissible size of defects is based on a maximum c ontamination area equivalent to a unit of defects 
and is proportional to the standard delivery size of the manufacturer. The total admissible area of 
contamination may be concentrated in one spot or dispersed over an amount of smaller defects.  
In case of p re-cut panels, the cumulative defect is referred to the standard delivery sizes of the 
manufacturers or amount of delivery.  
 
EXAMPLE Permitted unit of defect  (see EN 1 4322)      in this       sample      is       2 mm2/m2 
Standard delivery size of the manuf acturer: 5 000 mm × 2 000 mm  
 
Points : 
 
The permissible total error (TE) is calculated as follows:  DKS  2887: 2019  
© KEBS 201 9 — All rights reserved  3  
TE = Board length × Board width × Permitted unit of defect = 5 000 mm × 2 000 mm × 2 mm2/m2 = 20 
mm2  
 
The following errors are therefore permitted:  
 
1 × 20mm 2defect, or  
 
2 × 10mm2defect, or  
 
3 × 6,6 mm2 defect etc. Length:  
The permissible total error (TE) is calculated as follows:  
T E = Board length × Board width × Permitted unit of defect = 5000 mm × 2000 mm × 20 mm/m2 = 200 
mm 
The following errors are theref ore permitted:  
 
1 × 200 mm defect  
 
2 × 100 mm defect  
 
3 × 66 mm defect etc  
 
5.5 Resistance to scratching  
5.5.1  Principle  
Increasing loads are applied in specified steps to a diamond scratching point of defined geometry.  
The resistance to scratching of the melamine f aced board under test is expressed as a numerical rating 
which defines the minimum applied load which is producing a continuous surface scratch. The test result 
is verified by visually confirming that the next higher load -step produces a continuous scratch . 
5.5.2  Apparatus  
Scratch testing apparatus and viewing enclosure as d escribed in ISO 4586 -2,  
5.5.3  Test pieces  
Cut a test piece 100 mm × 100 mm from the board under test. Wipe the surface using cotton fabric 
impregnated with a solvent such as acetone.  It is importa nt that, once cleaned, the surface is not fingered 
in the test area. Before making the scratch test store the test piece for 4 days in the standard atmosphere 
according to Clause 4.  
5.5.4  Procedure  
Follow the p rocedure in ISO 4586 -2, with the following modificat ions.  
Start the test by making two scratches at 1,0 N with a spacing of approximately1 mm between the scratch 
marks. On the same test piece repeat this procedure with loads in increment of 0,5 N up to a load of 4 N 
leaving a space of approximately 3 mm bet ween each pair of scratches. Place the scratched samples in 
the standard atmosphere, defined in Clause 4, for 24 h before final inspection.  
5.5.5  Expression of results  
During the examination, the operator shall ensure that the double circle of scratch marks sele cted is truly > 
90 % continuous.  
The examination of the surface should take no longer than 10 s.  
Record the minimum load giving a continuous mark visible after 24 h in the standard atmosphere. In cases 
of dispute, three observers shall view the test piece and report their results independently; the final result 
shall be the average of the three reported values, rounded to the next 0,1 N.  
5.6 Resistance to staining  
5.6.1  Principle  
Test pieces are left in contact with a series of staining agents which are likely to be encountered in 
everyday use. The time and conditions of contact are specified for each staining agent. At the end of the 
specified contact period the test pieces are washed and examined for residual surface marks.  
5.6.2  Staining agents  
The test is carried out wi th the two representative staining agents: acetone and black coffee. Acetone is 
applied at ambient temperature; black coffee of normal drinking strength is applied at approximately   
   © KEBS 201 9 —  All rights reserved  4 80 °C. If the product under test meets specification requirements, then it is deemed to comply with the  
specification for stain resistance. Other staining agents are included in Annex A for information only and 
can be used after agreement between supplier and customer.  
5.6.3  Apparatus  
—   glass covering (e.g. watch glass) to prevent ev aporation;  
 
—   cleaning agent;  
 
—   diffuse light source.  
 
Light   source   providing   evenly   diffused   light   giving   an   illumination   on   the   test   surface   of  
(1 200 ± 400) lx. This may either be diffused daylight or be diffused artificia l daylight.  
 
The daylight should be unaffected by surrounding trees, etc. When artificial daylight is used it is 
recommended that it should have a correlated colour temperature of (5 000 to 6 500) K and a Ra greater 
than 92, by using a colour matching boo th in accordance with ISO 3668 . 
5.6.4  Test pieces  
Individual test pieces of any suitable size shall be used cut from the board under test. Where surface 
finishes are different, state the side to be tested.  
Alternatively, a single piece test specimen, large enough  to allow the staining materials to be applied side 
by side, can be used. Keep the test piece flat during the test. An area of about 100 mm × 100 mm is 
required for each test.  
5.6.5  Procedure  
The pieces shall be initially at room temperature. Apply a small quant ity (for example 2 or 3 drops) of 
staining agent to the test area. Cover the staining agents with a glass cover.  
After 16 h contact time has elapsed remove the staining agents completely. Then wash the test areas with 
any suitable cleaning agent.  
Leave the  test pieces 24 h in normal ambient conditions. Then view from various angles at a distance of  
400 mm using normal eyesight, corrected where necessary.  
 
NOTE          If agreed, another examination can be made after a further specified period of time  
 
5.6.6  Expr ession of results  
Use following rating scale for evaluation:  
 rating 5: No visible change; test area indistinguishable from adjacent surrounding area;  
 rating 4: Minor change; test area distinguishable from adjacent surrounding area, only when the 
light sour ce is mirrored on the test surface and is reflected towards the observer's eye, e.g. 
discoloration, change in gloss and colour;  
 rating 3: Moderate change; test area distinguishable from adjacent surrounding area, visible in 
several viewing, directions, e.g . discolorati on, change in gloss and colour;  
 rating 2:  Significant change; test area clearly distinguishable from adjacent surrounding area, 
visible in all viewing directions, e.g. discoloration, change in gloss and colour, and/or structure of 
the surface  slightly changed, e.g. cracking, blistering;  
 rating 1: Strong change; the structure of the surface being distinctly changed and/or discoloration, 
change in gloss and colour, and/or the surface material being totally or partially delaminated.  
  
5.7 Resistance to cracking  
5.7.1  Principle  
To determine the ability of the decorative surfaces of melamine faced board to resist to cracking under dry 
heat at 70 °C.  
5.7.2  Apparatus  
 electrically heated oven, provided with air circulation capable of being controlled at (70 ± 2) C;  
 hand-lens with approximately 6x magnification;  
 lighting of intensity (800 to 1 000) Lux.  
5.7.3  Test pieces  DKS  2887: 2019  
© KEBS 201 9 — All rights reserved  5 A 250 mm × 250 mm test piece shall be cut out of the product. The edges which define decorative sides 
shall be chamfered about 3 mm wide at an angle of about  45° to avoid any notch effect from the edge.  
5.7.4  Procedure  
The test piece shall be stored in an oven with air turbulence controlled at (70 ± 2) °C for 24 h. After 
subsequent cooling in standard reference atmosphere 23 °C/50 % relative humidity for 24 h, a mag nifier 
with 6x magnification shall be used to determine whether, and to what extent, cracks have appeared, 
when examined under a light intensity of (800 to 1 000) Lux  
5.7.5  Expression of results  
Cracks are divided into 2 classes. Hairline cracks that are difficu lt to see by eye and surface cracks that 
may cut into the surface finish and may reach the board. These can be clearly seen and felt.  
The result of the examination of the surface and reverse side shall be expressed in accordance with the 
following rating s cale.  
 rating 5: without cracks;  
 rating 4: isolated hairline cracks;  
 rating 3: hairline cracks randomly distributed over the total surfaces;  
 rating 2: in addition to stage 3, 1 to 2 small cracks < 25 mm have appeared  on the surface which 
are still visible a t an observation distance of 400 mm;  
 rating 1: more cracks spread over the total surface area.  
Surface cracks, which originate due to edge damage, are not taken into consideration for overall  
judgement.  
5.8 Colour matching and surface texture  
5.8.1  Principle  
To asse ss the colour and texture of each face of a test piece against a reference sample agreed between 
supplier and customer.  
5.8.2  Reference sample  
A sample, as retained by the manufacturer, approximatively A4 size. This sample shall be stored away of 
lights and heat  sources.  
5.8.3  Test piece  
A A4 size test piece shall be cut from the board under test. Where printed decors are to be examined, care 
should be taken to select the test piece from the same area as the reference sample to reflect the identical 
panel.  
5.8.4  Apparatus  
Light box for colour comparison: The light box is to be painted matt black and fitted with a light source 
(daylight, colour temperature 6 500 K) giving a light intensity of (800 to 1 000) Lux. The size of the box is 
to permit both the reference sample and th e test piece to stand side by side and vertically at the rear such 
that shadow free, non -reflected light strikes the samples.  
5.8.5  Procedure  
5.8.5.1  General  
The tester shall have normal eyesight, corrected if necessary, and not have any colour perception 
impediment.  
5.8.5.2  Colour matching  
The colour matching of these surfaces is carried out visually against the reference sample in the 
evaluation box using daylight (colour temperature 6 500 K). The samples are placed at the rear of the box, 
standing in a slightly inclined posit ion side by side, and are viewed from about 70 cm distance.  
 
NOTE Alternatively colour matching of unicolour or white decors can be done using a colour measuring apparatus . 
5.8.5.3  Surface texture  
Surface texture control is carried out visually against the referen ce sample in the evaluation box. The 
samples are placed at the rear of the box, standing side by side, with diffused reflected light across the 
surfaces.  
5.8.5.4  Expression of results  
The test pieces shall be judged as described above using the following rate scal e for evaluation:  
 R 5: no visible deviations;  
 R 4: slight deviations of colour and/or texture;  
 R 3: marked deviations of colour and/or texture;   
   © KEBS 201 9 —  All rights reserved  6  R 2: severe deviations of colour and/or texture.  
 R 1: very severe deviations of colour and/or texture  
5.9 Resistance  to abrasion of the decorative surface layer  
5.9.1  Principle  
This test measures the ability of the decorative surface of melamine surfaces board to resist abrasive 
wear -through to the sub -layer. Abrasion is achieved by rotating a specimen in contact with a pair of loaded 
cylindrical wheels covered with abrasive paper. The number of revolutions of the specimen required to 
cause a defined degrees of abrasion is used as measures of resistance to surface abrasion.  
 
NOTE          Printed decorations can be influenced by the hardness and thickness of the resin or protective layer over the decoration, 
single -colour decorations by the hardness and thickness of the decorative layer over the board.  
 
5.9.2  Test pieces  
Three square test pieces, edge length 100 mm, shall be cut out of the product. A hole shall be drilled in 
the middle of the test piece for clamping on the plate. The thickness of the test pieces shall be so selected 
that the height of the pivots on the supporting arms on which the friction wheels are positioned are al ways 
substantially parallel to the surface of the test piece. If needed, thicker test pieces shall be planed down on 
the underside.  
 
5.9.3  Preconditioning of the test pieces and abrasive paper  
The surface to be tested shall be cleaned with a non -hazardous organi c solvent which is immiscible with 
water. The test pieces and the abrasive strips shall then be stored for 72 h in the standard reference 
atmosphere, as defined in Clause 4.  In cases of dispute condition until constant mass is reached. 
Constant mass is co nsidered to be reached when the results of two successive weighing operations, 
carried out at an interval of 24 h, do not differ by more than 0,1 % of the mass of the test piece . 
 
5.9.4  Apparatus  
Test machine as specified in ISO 9352.  
5.9.5  Materials  
See ISO 4586 -2:  
5.9.6  Procedure  
See ISO 4586 -2:  
For test of boards complying with class 1 or 2 for wear, examine the specimen for wear after each  
10 revolutions.  
For test of boards complying with class 3A, 3B and 4 examine the specimen for wear after each  
25 revolutions. When coming close to the IP, the assessment shall be carried out every 10 revolutions.  
 
5.9.7  Expression of results  
See ISO 4586 -2: for definition of Initial Wear Point (IP). Record the IP as the number of revolutions.  
The results shall be the mean value of the 3 tes t pieces  
 
5.10 Resistance to water vapour  
5.10.1  Principle  
The test is used to determine the homogeneous bonding or the surface properties of a product. Hot steam 
stresses the decorative layer to a high degree.  
NOTE          If there is insufficient impregnation of th e decorative layers and if the polycondensation of the resins in has not cured 
correctly suffers loss of gloss and/or trends to lead to blistering and swelling of the board surface. The cellulose paths be fore 
pressing is too far advanced, hot steam can cau se blistering. Surface resin which  
5.10.2  Apparatus  
See ISO 4586 -2: 
5.10.3  Test pieces  
One test piece measuring 100 mm × 100 mm is required. Where different surface finish and laminate 
quality exists, the surface tested shall be stated.  
5.10.4  Procedure  
See ISO 4586 -2: 
5.10.5  Expres sion of results  
See ISO 4586 -2: DKS  2887: 2019  
© KEBS 201 9 — All rights reserved  7 5.11 Resistance to colour change in xenon arc light  
5.11.1  Principle  
A test specimen taken from the melamine faced board under test is partly exposed to the light of one or 
more xenon arc lamp(s), simultaneously with a set of blue wool references. The radiant exposure is 
determined by assessing the effect on blue wool references and related degradations of the colour of the 
specimen is assessed by the contrast between the exposed and unexposed portions of the test specimen.  
 
The test  method is fully described in ISO 4892 -2. 
5.11.2  Apparatus  
As described in ISO 4892 -2 with an evenly humidity control.  
5.11.3  Test pieces  
As specified in ISO 4892 -2 and ISO 4586 -2:  Where different surface finish and laminate quality exists, the 
surface tested shall be stat ed. 
5.11.4  Procedure  
Carry out the test using the single  exposure method described in ISO 4892 -2, Table  3, method B, cycle 
n°2 and discontinue the exposure when Blue Wool Standard No. Six shows a contrast between exposed 
and unexposed portions equal to Grade 4 of  the grey scale.  
5.11.5  Expression of results  
Examine the contrast between exposed and unexposed portions of the test piece and record it in terms of 
grades on the grey scale.  
Express the result in relation to the resistance to colour change of Blue Wool Standard  No. Six as shown 
in Table 1.  
 
Table 1 — Resistance to colour change  
Test piece contrast Resistance to colour change 
(Grey  Scale Grade  No.) (Blue Wool Standard No.) 
> 4 > 6 
4 6 
< 4 < 6 
 
5.12 Gloss level  
5.12.1  Principle  
Using either a specular gloss meter, or a r eflectometer, the aim of this test is to assess the specular gloss 
of the test piece as a numerical value or to compare the specular gloss of the test piece against a master 
sample.  
5.12.2  Test piece  
Cut a 200 mm × 200 mm test piece from the board or panel under examination. Where different designs 
and surface finishes are used the surface for comparison shall be stated.  
5.12.3  Apparatus  
Gloss meter as specified in ISO 2813.  
5.12.4  Procedure  
Place the gloss meter on the surface of the test piece.  
Measurements shall be carried o ut by using gloss meter with the specified geometries and accord ing to 
the following procedure:  
Measure the gloss using the 60° geometry method. If the result is greater or equal to 70 unit (high 
specular gloss) additional measurement shall be carried out using the 20° geometry method.  
 
NOTE 1       The 20° geometry method, which uses a smaller receptor aperture, is intended to obtain improved differentiation of high 
specular gloss.  
 
If the result is less than 10 units (low specular gloss) additional measur ements shall be carried out using 
the 85° geometry method.  
  
   © KEBS 201 9 —  All rights reserved  8 NOTE 2       The 85° geometry method, which uses a larger receptor aperture, is intended to obtain improved differentiation o f low 
specular gloss.  
 
The same geometry shall be used for all the meas urements of a test piece.  
 
At least 2 measurements shall be carried out in each of the four directions of the board (longitudinal and 
transverse) at the agreed angle. Calculate the mean value for each direction, rounded to the next whole 
number  
5.12.5  Expression of results  
The result is the mean value of numerical value expressed in gloss grade and in case of comparison; the 
result is the difference between the reference sample and the test piece.  
5.13 Resistance to impact by large -diameter steel ball  
5.13.1  Principle  
A test piece from the board under test is covered with a sheet of carbon paper and subjected to the impact 
of a steel ball which is allowed to fall from a known height. Impact resistance is expressed as the 
maximum drop height which can be achieved without incurr ing visible surface cracking or producing an 
imprint greater than a specified maximum diameter.  
5.13.2  Apparatus  
See ISO 4586 -2: 
5.13.3  Test pieces  
The test pieces shall be clamped in the frame without any support.  
The 5 test pieces shall be (230 ± 5) mm square.  
5.13.4  Proced ure 
See ISO 4586 -2: 
5.13.5  Expression of results  
See ISO 4586 -2 
 
6 Test report  
The test report shall include the following information for each test:  
 
a)    name of the laboratory;  
 
b)    reference t o the relevant clause of this Kenyan standard according  to the tes t; 
 
c)    name, type and thickness of product and when necessary colour, texture and side tested;  
 
d)    test results;  
 
e)    any deviation from the specified procedure;  
 
f)     date of the test.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 DKS  2887: 2019  
© KEBS 201 9 — All rights reserved  9 Annex A  
(informative)  
Staining agents  
 
Table A.1 — Staining agents  
 
Staining agents  Test conditions  
GROUP 1  
* Acetone  
Other organic solvents  
Toothpaste Hand cream Urine  
Alcoholic beverages  
Natural fruit and vegetable juices  
Lemonade and fruit drinks  
Meats and sausages  
Animal and vegetable fats and o ils 
Water  
Yeast suspension in water Salt (NaCI) solutions 
Mustard  
Lyes, soap solution  
Cleaning solution  
23 % dodecylbenzene sulphonate  
10 % alkyl aryl polyglycol ether  
67 % water  
Stain or paint remover based on organic solvents  
Citric acid (10 % solution)   
 
 
 
 
 
 
Apply staining agent at ambient temperature. Contact 
time: 16 h  
GROUP 2  
* Coffee Black (120 g of coffee per litre of water)  
 
Black tea (9g of tea per litre of water) Milk (all types)   
 
Apply test material at approximately 80 °C. Contact 
time 16 h  
Cola beverages  
Wine vinegar  
Alkaline -based   cleaning   agents   diluted   to   10 %  
concentration with water  
Hydrogen peroxide (3 % solution)  
Ammonia (10 % solution of commercial concentrate) 
Nail varnish  
Nail varnish remover  
Lipstick  
Water colours Laundr y marking inks Ball point inks   
 
 
 
 
Apply test material at ambient temperature  
Contact time 16 h  
If the product under test meets specification requirements when tested with the materials marked with an 
asterisk then it is deemed to comply with the specifi cation for stain resistance. The other test materials are 
included for information only.  
NOTE        Acids and alkalies in stronger concentration, which can be contained in commercial cleaning 
agents, can cause surface damage or marking, even with very sh ort contact time.