DRAFT UGANDA STANDARD DRAFT UGANDA STANDARD  
  DUS DEAS 868 
First  Edition  
2015-mm-dd 
 
 Reference nu mber  
DUS DEAS 868: 2015 
© UNBS 201 5 
  
Sack kraft paper — Part 1, Natural and extensible kraft paper  — 
Specification  
 DRAFT UGANDA STANDARDDUS DEAS 868:2015 
ii                © UNBS  2015 - All rights reserved 
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2015 
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS. 
Requests for permission to reproduce this document should be addressed to 
The Executive Director 
Uganda National Bureau of Standards 
P.O. Box 6329 
Kampala 
Uganda 
Tel: 256 41 505 995 
Fax: 256 41 286 123 
E-mail: unbs@infocom.co.ug  
Web: www.unbs.go.ug  
 DRAFT UGANDA STANDARDDUS DEAS 868:2015 
© UNBS  2015 - All rights reserved                iii National foreword 
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Uganda, as amended.  UNBS is mandated to co-
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT Agreement of the World Trade Organisation (WTO). 
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders. 
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Draft Uganda Standard, DUS DEAS 868: 2015 , Sack kraft paper — Part 1, Natural and extensible kraft 
paper  — Specification , is identical with  and has been reproduced from an East African  Standard , DEAS 868: 
2015, Sack kraft paper — Part 1, Natural and extensible kraft paper  — Specification , and is being proposed 
for adoption  as a Uganda Standard.  
Wherever the words, “ East African Standard" appear, they should be replaced by "Uganda Standard." 
 
  DRAFT UGANDA STANDARD DEAS 868:2015 
ICS  
© EAS 2014                                                                                                                         First Edition 2014  
 
DRAFT EAST AFRICAN STANDARD 
 
Specification for sack Kraft paper ; Part 1. Natural and 
extensible sack Kraft paper 
 
 
 
 
 
 
 
 
EAST AFRICAN COMMUNITY DRAFT UGANDA STANDARDDRAFT UGANDA STANDARDCD/K/25:2014 
ii © EAC 2014  – All rights reserved  
 Copyright notice 
This EAC document is copyright-protected by EAC. While the reproduction of this document by 
participants in the EAC standards 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 permission 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 2013  — All rights reserved 
East African Community  
P.O.Box 1096 
Arusha 
Tanzania 
Tel: 255 27 2504253/8 
Fax: 255 27 2504481/2504255 
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 persecuted 
 DRAFT UGANDA STANDARDDEAS 868:2015 
© EAC 2014  – 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 goods and services are exchanged 
within the Community will be removed.  
In order to achieve this objective, the Community established an East African Standards Committee mandated 
to develop and issue East African Standards.   
The Committee is composed of representatives of the National Standards Bodies in Partner States, together 
with the representatives from the private sectors and consumer organizations. Draft East African Standards 
are circulated to stakeholders through the National Standards Bodies in the Partner States. The comments 
received are discussed and incorporated before finalization of standards, in accordance with the procedures 
of the Community. 
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
This Draft East African Standard, DEAS .868:2015 ., was prepared by Technical Committee  EASC //TC/065 
Paper and paper products  The Committee is composed of representatives from National Standards Bodies,  
regulators and academia, together with the representatives from the private sector and consumer 
organizations in Partner States.  
 DRAFT UGANDA STANDARDDRAFT UGANDA STANDARDDRAFT EAST AFRICAN STANDARD  DEAS 868:2015  
 
© EAC 2014  – All right s reserved  1 
 Sack Kraft paper Part 1. Natural and extensible sack Kraft paper  
Specification 
1 Scope 
This Draft East African Standard  specifies require ments and test methods for natural and extensible sack 
Kraft paper.  
2 Normative 
ISO 1924-3, Paper and board -- Determination of tensile properties -- Part 3: Constant rate of elongation 
method (100 mm/min) 
ISO 535; Paper and board -- Determination of water absorptiveness -- Cobb method 
ISO 5636; Paper and board -- Determination of air permeance (medium range) 
ISO 536; Paper and board — Determination of grammage 
ISO 287; Paper and board -- Determination of moisture content of a lot -- Oven-drying method 
ISO 216, Writing paper and certain classes of printed matter -- Trimmed sizes -- A and B series, and indication 
of machine direction 
ISO 2758:2014 Paper -- Determination of bursting strength  
 
 
3 Terms and Definitions 
For the purposes of this standard, the definitions contained in ISO 6590-1 shall apply  
4 Requirements 
4.1 General requirements 
4.1.1 Fibre Composition  — The composition of the sack Kraft paper shall be free from mechanical pulp. 
4.1.2 Finish  — The surface of the paper shall be machine finished.  The paper shall be of uniform 
formation, thickness and substance.  It shall be evenly finished, free from conspicuous specks, holes and 
other blemishes. 
4.1.3  Dimensions  — 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 shall be ± 
0.5 per cent. DRAFT UGANDA STANDARDDEAS 868:2015 
2 © EAC 2014  – All rights reserved  
 4.1.4  Joints — The edges of the rolls shall be clean and perpendicular to the axis of the roll.  There shall 
be not more than 3 splices.  Where glue is used, it shall not penetrate to the other layers.  The joint shall be 
clean, properly made and strong enough to prevent breakage of paper when run of a converting machine.  
The splices place shall be marked with a clear arrow mark visible on both sides of the roll. 
4.2 Specific requirements  —  
The paper shall comply with the requirements given in Table 1 when tested in accordance with the test 
methods referred to in the table. 
TABLE 1 Specific requirements for natural and extensible sack kraft paper 
SL 
NO. CHARACTERITICS  
 REQUIREMENTS  METHOD OF 
TEST  
Natural sack Kraft  Extensible sack Kraft  
(i) Grammage, gsm, , 
±5% 70 76 80 90 95 70  
75 80 85  
90 ISO 536 
(ii) Moisture content,  
(%) range  6-8 6-8 6-8 6-8 6-8 6-8 6-8 6-8 6-8 6-8 ISO 287 
(iii) Tensile strength  
(kN/m) MD, min.  5.46 5.93 6.24 7.02 7.41 5.3 5.6 5.8 6.1  
6.4 ISO 1924 -3 
(iv) Tensile strength  
(kN/m) C D, min.  2.52 2.74 2.88 3.24 3.42 3.5 3.6 3.8 4.0  
4.5 ISO 1924 -3 
(v) Stretch (elongation) 
(%) MD, min.  2.1 2.1 2.1 2.1 2.1 7.5 7.5 7.5 7.5  
7.5  
ISO 1924 -3 
(vi) Stretch (elongation) 
(%) CD, min.  5 5 5  
5 5 7.0 7.0 7.0 7.0  
7.0 ISO 1924 -3 
(vii) T.E.A ind ex J/g MD, 
min. 1.0 1.0 1.0 1.0 1.0 2.8 2.8 2.8 2.8  
2.8 ISO 1924 -3 
(viii) T.E.A index J/gCD, 
min. 1.3 1.3 1.3 1.3 1.3 2.2 2.2 2.2 2.2  
2.2 ISO 1924 -3 
(ix) Porosity (mL/min.), 
min. 250 250 250 250 250 180 180 180 180 180 ISO 5636 
(x) COBB number per 
min. range (g/m2) 25-
35 25-
35 25-
35 25-
35 25-
35 25-
35 25-
35 25-
35 25-
35 25-
35 ISO 535 
(xii) Burst indexa), 
KPa*m2/g, min.    DRY  3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 ISO 2758  
WET 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 ASTMD 
774/ISO 2758  
(xii) 
Tear in dex, 
mNm2/g 
(MD/CD), min  
  
MD 
 9.0 9.0  
9.0  
9.0  
9.0 25 25 25 25 25 ISO 1924 -3 
 
 
 
CD 
  
 
11.0  
 
 
11.0  
 
 
11.0  
 
 
11.0  
 
 
11.0      ISO 1924 -3 DRAFT UGANDA STANDARDDEAS 868:2015 
© EAC 2014  – All rights reserved  3 
  
Tensile Index  
Nm/g  
  
MD 
 78  
78  
78  
78  
78      ISO 1924 -3 
 
CD 
 36  
36  
36  
36  
36      ISO 1924 -3 
  a) Burst index = burst factor X 0.098  
4 Packaging and Labeling 
4.1 Packaging 
4.1.1  The paper shall be marketed in rolls.  It shall be wound on a hollow cylindrical core made in one 
continuous length.  The core shall be rigid and smooth made of paper, cardboard or other suitable material. 
4.1.2  The length of the core shall not exceed the width of the paper.  Its inner diameter shall be 76 or 100 
mm and its thickness 15  2 mm. 
4.1.3  Each end of the core shall be closed with a plug made of wood or any other suitable material.  The 
plug shall be firmly secured to the core. The paper shall not have any creases. 
4.2 Labelling 
Each roll shall be clearly marked with the following information: 
a) Name and physical address of the manufacturer; 
b) Name of the product; 
c) Size and grammage of paper; 
d) Gross weight of the roll; 
e) Roll number , Batch number and lot number; 
f) Country of origin. 
 DRAFT UGANDA STANDARDDRAFT UGANDA STANDARD  
 
© EAC 2014 – All rights reserved