DEAS  868: 2023 
ICS 85.080.01  
 
© EAC 2023                                                                                                                         Second  Edition 2023  
 DRAFT EAST AFRICAN STANDARD  
Natural and extensible sack kraft paper — Specification  
EAST AFRICAN COMMUNITY  
 
 
 
 
 
 
   DEAS  868: 2023 
ii © EAC  2023 – All rights reserved  
 Copyright notice  
This EAC document is copyright -protected by EAC. While the reproduction of this document by 
participants in the EAC standa rds development process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduced, stored or transmitted in any form for 
any other purpose without prior written permission from EAC.  
Requests for permiss ion to reproduce this document for the purpose of selling it should be addressed 
as shown below or to EAC’s member body in the country of the requester:  
© East African Community  2023 — All rights reserved  
East African Community  
P.O. Box 1096 , 
Arusha  
Tanzan ia 
Tel: + 255 27 2 162100  
Fax: + 255 27 2162190  
E-mail: eac@eachq.org  
       Web: www.eac -quality.net  
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  
Violators may be prosecuted . 
 DEAS  868: 2023 
© EAC 2023 – All rights reserved  iii 
 Foreword  
Development of the East  African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when go ods and services are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the N ational 
Standards Bodies in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including government, academia, consumer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and i ncorporated before finalization of standards, in 
accordance with the Principles and procedures for develop ment of East African Standards.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Stan dards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC /TC 065, Paper and paper 
produc ts. 
Attention is drawn to the po ssibility that some of the elements of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
This second edition cancels and replaces the first edition (EAS 868:2017), which has been  technically revised  
 DRAFT EAST AFRICAN STANDARD  DEAS  868: 2023 
 
© EAC 2021 – All rights reserved  1 
 Natural and extensible sack kraft paper — Specification  
1 Scope   
This Draft East African Standard specifies requirements, sampling and test methods for natural and extensible 
sack Kraft paper . 
2 Normative references   
The following d ocuments 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 (inc luding any amendments) applies.  
ISO 186, Paper and board – Sampling to determine average quality   
ISO 187, Paper board and pulps — Standard atmosphere for conditioning and testing and procedure for 
monitoring the atmosphere and conditioning of samples    
ISO 216, Writing paper and certain classes of printed matter — Trimmed sizes — A and B series, and 
indication of machine direction   
ISO 287; Paper and board — Determination of moisture content of a lot — Oven -drying method   
ISO 535; Paper and board — Determi nation of water absorptiveness — Cobb method   
ISO 536; Paper and board — Determination of grammage   
ISO 1924 -3, Paper and board — Determination of tensile properties —- Part 3: Constant rate of elongation 
method (100 mm/min)   
ISO 2758, Paper — Determinatio n of bursting strength   
ISO 5636; Paper and board — Determination of air permeance (medium range)   
ISO 6588 -1, Paper, board and pulps — Determination of pH of aqueous extracts — Part 1: Cold extraction   
ISO 6590 -1, Packaging — Sacks — Vocabulary and types — Part 1: Paper sacks    
3 Terms and definitions   
For the purposes of this standard, the terms and definitions given in ISO 6590 -1 shall apply . 
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Onlin e browsing platform: available at  http://www.iso.org/obp  DEAS  868: 202 3 
2 © EAC  2023 – All rights reserved  
 3.1 
natural sack Kraft  paper  
sack paper, basically produced without any additional treatment for improvement of the elongation in the 
machine direction  
3.2 
extensible Kraft  sack paper  
sack paper modified for the improvement of its elongation in the machine direction  
4 Requirements  
4.1 General requirements  
4.1.1  The paper shall be free from defects such as wrinkles, folds, paper dust, tears which have not been 
glued, stains, prominent marks, slime holes and foreign matters  
4.1.2  The edges of the rolls shall be clean and perpendicular to the axis of the roll. There shall be not more 
than three splices. Where glue is used, it shall not penetrate to the other layers .  
4.1.3 When supplied as rolls, the paper shall be wound on a hollow cylindrical core made in one 
continuous length. The length of the core shall not exceed the width of the paper and shall be as agreed 
between the manufacturer/ supplier and purchaser.   
4.1.4 The joint shall be clean, properly made and strong enough to prevent breakage of paper when run of 
a converting machine.  
4.2 Specific requirements   
4.2.1  The paper shall comply with the requirements given in Table 1 when tested in accordance with t he 
test methods referred to therein.  
Table 1 — Specific requirements for natural and extensible sack Kraft paper  
S/No 
. Characteristic  Requirement  Test 
methodb 
Natural  sack Kraft  Extensible sack Kraft  
i. Grammage , g/m2, 
± 5 %   50 60 70 75 80 90 100 110 120 70 75 80 90 100 110 120 ISO 536   
ii. Moisture content, 
%, m/m    4.0 - 8.5 
ISO 287   
iii. Tensile strength , 
kN/m, MD, min.   2.7 3.3 3.9 4.1 4.4 5.0 5.6 6.1 6.7 3.2 3.4 3.6 4.1 4.6 5.0 5.5 
ISO 
1924 -3   
   
  iv. Tensile  strength, 
kN/m, CD, min.   1.5 1.8 2.1 2.3 2.4 2.7 3.0 3.3 3.6 2.5 2.6 2.8 3.2 3.6 3.9 4.3 
v. Stretch 
(elongation), %, 
MD, min .   1.6 1.8 3.5 DEAS  868: 202 3 
© EAC 2023 – All rights reserved  3 
 vi. Stretch 
(elongation), %, 
CD, min.   4.0 5.0 
vii. T.E.A 
index, 
J/g, min.   MD   0.7 2.2 
CD   0.9 1.3 
viii. Tear index, 
mNm2/g, 
(MD/CD), min    8 
ix. Porosity, mL /min, 
min.   180 ISO 5636   
x. Water   
absorptiveness, 
g/m2, max.  35 
ISO 535   
xi. Burst 
indexa, 
kPa*m2/g, 
min.  Dry   3.5 
ISO 2758   
 Wet   0.15 
xii pH [4.5 -9.5] ISO 
6588 -1  
 
4.2.2  The manufacturer shall declare the dimensions of the roll. When in sheet form, it shall be of a series 
as prescribed in ISO 216. The permissible tolerance on the nominal dimension sh all be ± 0.5 %.  
4.2.3  Where the paper sack is used as primary packaging for food material, it shall comply with the 
microbiological requirements and limits of heavy metals and contaminants in EAS 930  
5 Packaging and labelling  
5.1 Packaging  
The paper  shall be in rolls or reams suitably packaged to prevent damage during transportation and storage.   
5.2 Labelling  
5.2.1   Each package shall be legibly and indelibly labelled either in English, Kiswahili or French or a 
combination, with the following infor mation  
a) name and physical address of the manufacturer;  
b) name of the product;  
c) grammage of paper in grams per square metre;   
d) width of the paper in metres;  DEAS  868: 202 3 
4 © EAC  2023 – All rights reserved  
 e) total weight of the reel in kilograms;  
f) roll number  or batch/lot number for rolls  
g) batch/lot number  for sheets ; and  
h) country of origin/manufacture.  
5.2.2  Each bulk package shall be legibly and indelibly labelled either in English, Kiswahili or French or a 
combination, with the following information:  
a) name and physical address of the manufacturer  
b) name  of the product;  
c) length and width of the sheet;  
d) number of reams;  
e) total weight in kilograms ; 
f) grammage of the paper;  
g) country of origin/manufacture. and  
h) batch/code number  
6 Sampling  
Sampling shall be done in accordance with ISO 186 . 
 
 DEAS  868: 202 3 
© EAC 2023 – All rights reserved  5 
 Bibliography  
EAS 868:2017, Natural and extensible sack Kraft paper — Specification  DEAS  868: 2023   
 
© EAC 2023 – All rights reserved