KENYA STANDARD      DKS 2891 :2019 
ICS 85.060; 67  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Grease proof /Grease resistance ), paper in 
direct contact with  food containing grease 
and oil—Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
© KEBS 201 9 First Edition 201 9 
 
 
  DKS 2891 :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 Network  
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 Kenya  
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, copyright subsists 
in all Kenya Standards and except as provided under Section 25 of this Act, no Kenya Standard produced by Kenya Bureau of Sta ndards 
may be reproduced, stored in a retrieval system in any form or transmitted by any mea ns without prior permission in writing from the 
Managing Director.  
  KENYA STANDARD                                     DKS 2891 :2019 
ICS 85.060; 67  
© KEBS 201 9 — All rights reserved    iii  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Grease proof /Grease resistance), paper in 
direct contact with food containing grease 
and oil—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 2891 :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.  
 
Grease proof /Grease resistance  paper  is used as packaging  material  impermeable to  oil and grease  in  
food. Grease  proof paper is produced by refining the paper stock and thus create a sheet with v ery low porosity. 
This sheet is super  calendared  to further improve the d ensity, creating a paper called glassine . The glassine 
is treated  with starches , alginates  or Carboxy  methyl cellulose  in a size press  to fill pores or treat the paper 
chemi cally to make it fat repellent.  Grease resistant paper is produced by  coating paper with starch which is 
impregnated  with appropriate grease resistant agent.  
 
In the manufacturing sector , the Grease proof /grease resistant pap er is converted  into bags, wraps , 
laminates which are used to  package greasy and  oily food stuff . 
 
This standard shall be useful to manufacturers  of food that has grease or oil, fast  food outlets, paper  converters,  
importers , exporters, standards enforcement agencies and other stakeholders . 
 
Parameters covered in the standard include grease or oil resistance , 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:  
 
IS 662, Specification  for grease proof paper . 
 
Acknowledgement is hereby made for the assistance derived from this source . 
  
KENYA STANDARD       DKS 2891 :2019 
 
 
© KEBS 201 9 — All rights reserved    1 Grease proof /Grease resistance), paper in direct contact with food 
containing grease and oil —Specification  
 
1 Scope  
 
This Kenya  Standard specifies  the requirements and methods  of sampling and test for Grease proof /grease 
resistant  in direct contact with greas y and oily food. 
 
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 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 -- Dete rmination of tearing resistance -- Elmendorf method  
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 wat er 
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 -1  Paper and board — Determination of grease resistance — Part 1: Permeability test  
ISO 16532 -2 Paper and board -- Determination of grease resistance -- Part 2: Surface repellency test.  
 
ISO 16532 -3  Paper and Board -- Determination of grease resistance -- Part 3: turpentine test for voids in 
glassine and greaseproof papers   
 DKS 2891 :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  
Greaseproof paper  
 
Paper free from mechanical pulp having a high resistance penetration by grease or oil 
 
3.2  
Grease resistance paper  
Paper having good to very high resistance to penetration by grease or fats  
 
 
4 Requirements  
 
4.1 General requirements   
 
The fibre used shall be purely virgin pulp and shall be machined finished, glazed  and free from visible 
specks, creases, cuts , holes and other paper defects   
 
5. Specific requirements  
 
5.1 Specific requirements for Grease proof /Grease resistance  paper  
 
Grease  proof/Grease resistance  paper  shall meet the physical requirements as specified  in table 1.  
 
Table 1 — Physical requirements for Grease proof/ Grease resistance pape r 
 
S/No. Characteristic  Requirement  Test method  
 
i.  Grammage, g/ m2, min, ± 
5 % 35 40 50 60 70 80 KS ISO 536 
ii.  Moisture content, %, 
range  4 — 8.5  KS ISO 287 
iii.  Tensile 
strength, 
kN/m , min  
  
MD 
 2.5 2.85 3.5 4.5 5 5.9 KS ISO 1924 -2 
CD 1.4 1.65 2 2.4 2.7 3.1 
iv.  Wet tensile 
strength, 
kN/m, min  
 MD 0.31  KS ISO 3781  
CD 
v.  Burst Strength  110 165 220 285 375 475  
vi.  Burst Index,Kp a.m2/g 3.2 3.5 3.7 3.8 3.6 3.6 KS ISO 2758  
vii.  MD 140 165 220 285 375 475 KS ISO 1924 -2 DKS 2891 :2019 
© KEBS 201 9 — All rights reserved    3 Tear Strength , 
min. CD 155 185 245 325 420 535 
viii.  pH 5  —8 KS ISO 6588 - 
ix.  Cobb  (60s) , 
g/m2,max 35 KS ISO 5637  
x.  Grease  proof, 
seconds , min 1200  KS ISO 16532 -2 
xi.  Grease 
resistance, KIT  
value,  min 2 KS ISO 16532 -1 
 
 
 
5.2 Limits of heavy metals and organic contaminants  
 
Shall meet  the requirements as specified in EAS 93 0 
 
5.3 Microbiological requirements  
 
Shall meet the requirements as specified in EAS 93 0 
 
 
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 % or 3 mm whichever is less  
 
5.4.2 For paper supplied  in reels, the width and diameter of the reel shall be as declared and the diameter 
shall b e within a tolerance of ± 6 mm when tested in accordance with Annex A.  
 
6 Packaging and Labelling  
 
6.1 Packaging  
 
6.1.1 Grease proof grease resistance paper shall be packed in suitable materials that  prevents them  from 
damage , contamination  during handling, storage and  transportation.  
 
 
6.2 Labelling  
 
6.2.1 Bulk package   
 
The bulk  package of Grease proof /grease resistant paper  
shall be legibly and indelibly marked with the following information  on the outer . 
 
i. Manufacturer’s name , address  and /or registered trade mark.  
 
ii. Description of goods, “Grease proof /grease resistant ”. 
 
iii. Dimensions . 
 
iv. Batch number or code  
 
v. Instruction for correct use  
 
i. Instruction for storage and disposal.  
 
ii. The declaration, ‘ country of  origin.  DKS 2891 :2019 
4  © KEBS 201 9 — All rights reserved   
6.2.2  Grease proof /grease resistant paper  
 
The Grease proof /grease resistant 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.  
 
iv. Instruction for correct use, storage and disposal.  
 
 
7 Sampling  
 
Sampling of the Grease proof /grease resistant paper  shall be done in accordance to ISO 186  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 DKS 2891 :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.