KENYA STANDARD      DKS 2892 :2019 
ICS 85.060; 67  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Machine finished Kraft Paper  for dry foods  
—Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
© KEBS 201 9 First Edition 201 9 
 
 
  DKS 2892 :2019 
ii  © KEBS 201 9 — All rights reserved  TECHNICAL COMMITTEE REPRES ENTATION  
 
The following organizations were represented on the Technical Committee:  
 
Univer sity o f Nairobi – Chemistry Department  
Kenya Industrial Research and Development Institute  
National Environment Management authority  
East African Packaging Industries  
Consumer Information Ne twork  
Government Chemist's Department  
Sumaria Industries Ltd.  
GS1 Kenya  
Bell Industries ltd  
Kenya Association of Manufacturers (KAM)  
Institute of Packaging Professionals of Kenya  
Nestlé Ear  
Barcode Global Standards 1 (EA) Ltd  
Institute of Packaging of Keny a 
Kenya Bureau of Standards — Secretariat  
 
 
 
REVISION OF KENYA STANDARDS  
 
In order to keep abreast of progress in industry, Kenya Standards shall be regularly reviewed.  Suggestions 
for improvements to published standards, addressed to the Managing Director, Kenya Bureau of Standards, 
are welcome.  
 
 
 
 
© Kenya Bureau of Standards, 201 9 
 
Copyright. Users are reminded that by virtue of Section 25 of the Copyright Act, Cap. 130 of 2001  of the Laws of Kenya, copy right subsists 
in all Kenya Standards and except as provided under Section 25 of this Act, no Kenya Standard produced by Kenya Bureau of Standards 
may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing f rom the 
Managing Director.  
  KENYA STANDARD                                     DKS 2892 :2019 
ICS 85.060; 67  
© KEBS 201 9 — All rights reserved    iii  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Machine finished Kraft Paper for 
packaging of dry food —Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
KENYA BUREAU OF STANDARDS (KEBS)  
 
Head Office: P.O. Box 54974, 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  
 
  DKS 2892 :2019 
iv  © KEBS 201 9 — All rights reserved   
Foreword  
 
This Kenya Standard was prepared by the  Technical Committee on Packaging  (053)  under 
the guidance of the Standards Project s Committee, and it is in accordance with the 
procedures of the Kenya Bureau of Standards.  
 
Machine finished Kraft paper is one that is treated  mechanically on the paper or  board 
machine to improve the smoothness and uniformity of appearance on both sides. The 
pulping process utilizes Kraft pulp yielding its natural brown color. Bleached Kraft Paper 
under goes a treatment using bleach and other additives to produce white colour.   
 
In the manufacturing sector, machine finished  Kraft paper is used for packaging of sugar,  
flour and dry food carrier  bags.  
 
This standard shall be useful  to manufacturers  dry foods, converters,  fast food outlets,  
importers , exporters, standards enforcement agencies and other stakeholders . 
 
Parameters covered in the standard include Stretch,  tensile strength,  tensile energy 
absorption , burst index,  tear strength,  pH, cobb, dimension  Limits of heavy metals and 
organic contaminants , Microbiological requirements among others . 
 
During the preparation of this standard, reference was made to the following document:  
 
Information from  the packaging Industry  
 
Acknowledgement is hereby made for the assistance derived from this source . 
  
KENYA STANDARD       DKS 2892 :2019 
 
 
© KEBS 201 9 — All rights reserved    1 Machine finished Kraft Paper  for packaging of dry  food  —Specification  
 
1 Scope  
 
This Kenya  Standard specifies  the requirements and methods  of sampling and test for Machine finished  Kraft 
Paper used for packaging of dry food  such as sugar, flour and dry food carrier bags  
2 Normative references  
 
The following documents are referred to in the text in such a way that some or all of their content constitutes 
requirements of this document. For dated references, only the edition cited applies. For undated references, 
the latest edition of the referenced document (including any amendments) applies.  
 
EAS 880, Waxed paper for packaging of confectionery — Specification  
EAS 930 Paper and board food contact packaging material — Specification  
EAS 933, Paper and board intended to come into contact with foodstuffs — Determination of formaldehyde 
in an aqueous extract  
ISO 186  Paper and board -- sampling  to determine average quality  
ISO 216  Writing paper and certain classes of printed matter -- Trimmed sizes -- A and B   
  series, and indication of machine direction  
ISO 536  Paper and board -- Determination of grammage  
ISO 2758  Paper -- Determination of bursting strength  
ISO 1974  Paper -- Determination of tearing resistance -- Elmendorf method  
ISO 1924 -3, Paper and board — Determination of tensile properties — Part 3: Constant rate of elongation 
method (100 mm/min)  
 
ISO 187  Paper and board -- Conditioning  of samples  
ISO 9184 -1 Paper, board and pulps -- Fibre furnish analysis -- Part 1: General method  
ISO 4046 -1 Paper, board, pulps and related terms -- Vocabulary -- Part 1: Alphabetical   
  index   
ISO 4046 -2.  Defines  terms related to pulping, in both English and French.  
ISO 4046 -3:  Defines  terms related to paper making, in both English and French  
ISO 4046 -4:  Defines  terms related to paper and board grades and converted products, in both English 
and French.  
ISO 5637  Paper and Board -- Determination of water absorption after immersion in water  
ISO 6588 -1  Paper, board and pulps — Determination of pH of aqueous extracts — Part 1: Cold 
extraction  
ISO 8784 -1,  Pulp, paper and board — Microbiological examination — Part 1: Total count of bacteria, 
yeast, mould based on disintegration  
 
ISO 16532 -3  Paper and Board -- Determination of grease resistance -- Part 3: turpe ntine test for voids in 
glassine and greaseproof papers   
 DKS 2892 :2019 
2  © KEBS 201 9 — All rights reserved  ISO 3781   Paper and Board -- Determination of tensile strength after immersion in water  
 
3. Terms and definition  
 
For the purposes of this standard the  terminologies given in KS ISO 4046 part 1 to 5 and others below shall 
apply.  
 
3.1 
machine finished Kraft paper or board  
 
paper or board treated mechanically on the paper board machine to improve the smoothness and uniformity 
of appearance on both sides  
 
 
 
4 Requirements  
 
4.1 General requirements   
 
The fibre used shall be purely virgin pulp and shall be machine  finished  Kraft paper and  free from visible 
specks, creases, cuts holes and other paper defects .  
 
5. Specific requirements  
 
5.1 Specific requirements for machine finished Kraft  paper  
 
Machine finished Kraft Paper for packaging of dry food shall meet the physical requirements as specified  in 
table 1  
 
Table 1 — Physical requirements for Machine finished Kraft Paper for packaging of dry food  
 
S/No. Characteristic  Requirement  Test method  
 
i.  Grammage, g/ m2, min, ± 
5 % 70 80 90 100 110 120 KS ISO 536 
ii.  Moisture content, %, 
range  5 — 8.5  KS ISO 287 
iii.  Tensile 
strength, 
kN/m, min  
  
MD 
 5.9 6.8 7.6 8.5 9.3 10.2 KS ISO 1924 -3 
CD 2.9 3.4 3.8 4.2 4.6 5.1 
iv.  Stretch, %, 
min MD 1.8 1.8 2 2 2.1 2.1 KS ISO 1924 -3 
CD 5 5 5 5 5 5 
v.  Burst Strength, Kpa, min  245 280 315 350 385 420 KS ISO 1924 -3 
vi.  Burst 
Index,Kpa.m2/g,min  3.5 KS ISO 2758  
vii.  Tear Strength , 
mN, min. MD 450 525 600 675 750 825 KS ISO 1924 -3 
CD 525 600 675 750 825 900 
viii.  TEA, j/m2,min MD 77 88 99 110 121 132 KS ISO 1924 -3 
CD 112 128 144 160 176 192 
ix.  MD 1.1 KS ISO 1924 -3 DKS 2892 :2019 
© KEBS 201 9 — All rights reserved    3 TEA index , j/g, 
min CD 1.6 
x.  pH 5  —8.5  KS ISO 6588 - 
xi.  Cobb 
(60s),max  35  KS ISO 5637  
 
 
 
 
 
5.2 Limits of heavy metals and organic contaminants  for machine finished Kraft paper  
 
Machine finished Kraft  paper shall meet the Limits of heavy metals and organic contaminants  as specified in 
EAS 930  
 
5.3 Microbiological requirements  for machine finished Kraft paper  
 
 
Machine finished Kraft  paper shall meet the microbial requirements as specified in EAS 930  
 
5.4 Dimension  
 
5.4.1  When tested in accordance with ISO 216 t he dimensions (length and width) of the sheet shall be as 
specified in the marking within  a tolerance of ± 0.5 %.  
 
5.4.2 For machine finished Kraft  paper supplied  in reels, the width and diameter of the reel shall be as 
declared and the diameter shall be within a tolerance of ± 6 mm when tested in accordance with Annex A.  
 
6 Packaging and Labelling  
 
6.1 Packaging  
 
6.1.1 Machined finished  Kraft paper shall be packed in suitable materials that  prevents it from damage , 
contamination  during l handling, storage and  transportation.  
 
 
6.2 Labelling  
 
6.2.1 Bulk package   
 
The bulk  package of machine finished Kraft  paper shall be legibly and indelibly marked with the following 
information . 
 
i. Manufacturer’s name,  address and /or registered trade mark.  
 
ii. Description of goods, “machine finished Kraft  paper ”. 
 
iii. Dimensions.  
 
iv. Batch number or code  
 
v. Instruction for correct use  
 
i. Instruction for storage and disposal.  
 
ii. The declaration, ‘ country of  origin.  
 
6.2.2  Machine finished Kraft Paper for packaging of dry food  DKS 2892 :2019 
4  © KEBS 201 9 — All rights reserved   
The Machine finished Kraft  paper shall be legibly and indelibly marked with the following information  
 
i. Manufacturer’s name , address and /or registered trade mark.  
 
 
ii. Batch number or code  
 
 
iii. Instruction for correct use, storage and disposal.  
 
 
7 Sampling  
 
Sampling of the machined finished  Kraft paper  shall be done in accordance to ISO 186  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 DKS 2892 :2019 
© KEBS 201 9 — All rights reserved    5 Annex A  
 
(normative)  
Measurement of dimensions  
A.1 Measure to the nearest 0.5 mm, the width, (parallel to the cross direction of the paper) of each five 
test specimen taken across full width of five separate rolls and record the average of the results.  
A.2 Measure to the nearest 1 mm, the diameter of each of the five rolls and record the results. Check for 
compliance with 5.4.2.