TBS/CDC10( 6221 ) P3 
  
 
© TBS 2 019 All right R eserved                                                                 First Edition 2019                                                                
  
DRAFT TANZANIA STANDARD  
 
 
 
 
 
 
 
 
TBS/CDC -10 (6221 ) P3 CORRUGATING MEDIUM / FLUTING — 
SPECIFICATION  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARD STBS/CDC1 0 (6621 ) P3 
 
© TBS 20 19 - All righ ts reser ved                                                                      First Edition 2009                                                                     0   Foreword  
 
This Draft Tanzania Standard is being developed by Station ery and Paper  Products Technical 
Committee under supervision of the Chemical s Division al Standards Committee and it is in 
accordance with the procedures of the Bureau.  
 
Corrugating medium or fluting is used in manufacture of packaging containers.  
 
 
This Draft Tanzania Standard is the  first edition of corrugating medium /fluting  for corrugated 
boxes  – Specification . 
 
 
This draft Tanzania Standard has been prepared with assistance drawn  from the following 
documents:  
 
SANS431 :2007 Liners and fluting for corrugated board  - Specification,  publishe d by 
South African National Standard.   
 
TZS 2146: 2018 - EAS 865: 2017  Corrugated fibre  board boxes for general packaging – 
Specification  
 
IS 1763: 2018 Specification for substa nces of paper and pulp board, published by India 
Bureau of Standards  
 
 
The ass istance obtained from the above sources is hereby acknowledged with thanks.  
 
For the purpose of deciding whet her a particular requirement of this Tanzania Standard is 
complied with, the final value observed or calculated, expressing the result of a test or  analysis, 
shall be rounded off in accordance with TZS 4 . 
 
 
 
 
                                                     TBS/CDC1 0(6621) P 3   
 
©TBS 20 19 – All rights reserved                                                                                                   1  
 
DRAFT TANZANIA STANDARD                TBS /CDC 1 0(6621)  P3 
 
 
Corrugating medium /fluting – Specification  
 
1   Scope  
 
This draft Tanzania Standard specifies the requirements, sampling and te st methods  of 
corrugating medium /fluting  used  to manufacture  packaging containers.   
  
 
2   Normative referen ces 
 
The following documents, in whole or in part, are normatively referenced in this document and are 
indispensable for its application. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced doc ument (including any amendments) applies.”  
 
 
TZS 4:  Rounding off numerical values  
 
TZS 79: Paper – Dete rmination for bursting strength  
 
TZS 80: Pap er – Sampling methods for testing  
 
TZS 81:  Method for the determination of grammage ( basic mass)  
 
TZS 82: -ISO 187, Paper board and pulps — Standard atmosphere for conditioning and 
testing    and    procedure for monitoring the atmosphere and conditioning of samples  
 
TZS 83: -ISO 287; Paper and board — Determination of moisture content of a lot — 
Oven -drying met hod 
 
TZS 423: -ISO 535 : Paper and board — Determination of water absorptiveness - cobb 
method  
 
TZS 747: -ISO 1974, Paper — Determination of tearing r esistance — Elmendorf method  
 
TZS 748 -2: - ISO 1924 -3, Paper and board — Determination of tensile properties  —- Part 
3: Constant rate of elongation method (100 mm/min)  
 
TZS 891: -ISO 534; Paper and board — Determination of thickness, density and specific 
volume  
 
ISO 12192: Paper and Board - Determination of compressive strength – Ring Crush 
method  
 
ISO 9895: Pape r and Board - Compressive strength – Short Span Test  
 
 
 
  
  ©TBS 20 19 – All rights reserved    
 
 
 
3   Terms and d efinitions  
 
For the purpose of this  draft Tanzania Standard the fo llowing defi nitions shall apply:  
 
3.1  bursting strength  
 
maximum uniformly distributed pressure, applied  at right ang les to its surface, that a test piece of 
paper o r board will stand, under specified test conditions . 
 
3.2  corrugating / fluting medium  
 
middle liner of  the corrugated board that are used in manufacture of corrugated board containers 
for packagin g purposes . 
 
3.3 cross direction (CD)  
direction in the paper that is at right angles to the machine direction . 
 
3.4 defective  
set of test pieces that fai ls in on e or more respects to comply with the relevant requirements of 
the standard . 
 
3.5 grammage  (substance)  
mass of unit area of paper or board  determined by the  specified method of test and expressed in 
grams per square meter  and conditioned in accordance wit h TZS 82/ISO 187 . 
 
3.6 nominal  gram mage (substan ce) 
the value of the mass per unit area used f or reference pu rposes (i.e. when purchasing material)  
 
3.7 actual  grammage (substance ) 
the value of the mass per unit area determined by testing  
 
3.7 long grain  
orientation when the machine direction of the paper is in th e long direction of the sheet . 
 
3.8 lot  
one or mo re nominally identical package of paper, the paper having been made on the same 
equipment under essentially the same conditions, from one manufactu rer, and submitted a t any 
one time for inspection and testi ng. 
 
3.9 machine direction (MD)  
direction in a pap er or a board parallel to the direction of travel of the web on the paper or board  
machine  
 
3.10 sizing  
the addition of materials  in the pulp stoc k or on the surface o f the sheet (surface sizing) - -in orde r 
to increase  paper resistance to  the spontaneous  penetration of aqueous liquids and its resistance 
to the surface spreading of such liquids . 
 
 
 
  
©TBS 20 19 – All rights reserved                                                                                                    3   4   Requirements  
 
4.1 General requirements   
 
4.1.1  Corrugating medium /fluting  shall  be made from 100%  waste paper or combination of wa ste 
paper  and agricultur al waste  or non-wood in  a combination  with sulphate pulp  or any other 
material that will ensure compl iance with the requirements  given in Table 1 .   
 
4.1.2 The paper shall be free from fibre bundles , foreign matter, holes, creases  and other  visible 
defect s and shall be uniform in texture.   
 
4.1.3 The corrugating medium  shall be of  reasonably good formation or uniform formation, 
thickness and substan ce. 
 
4.1.4 The corrugating medium shall be free from  abrasive constituents that may i nduce a h igh 
rate of wea r of corrugating rolls . 
 
4.1.5 The corrugating medium shall be such that it does not crack during corrugating process . 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                     TBS/CDC1 0(6621) P 3   
 
©TBS 20 19 – All rights reserved                                                                                                   1 4.2 Specific requirement s  
 
4.2.1 Corrugating medium for corrugated board  shall be manufactured as per preferred substances given in Table 1.  
 
4.2.2 If a substance not given in Table 1 is required, it shall be agreed upon between the purchaser an d the supplier and shall be selected so that 
it conforms to the steps of increment given  below:  
 
Range of sub stance                                                                           Steps of increment of substance  
g/m2                                                                                                                                                                g/m2 
110 - 150                                                                                                 10 
Above 150                                                                                               25   
4.2.3 Corrugating medium / fluting shall  comply with  the relevant requirement given i n Table 1 when tested in  accordance with the method 
specified therein.  
Table 1- Specific requirements for corrugating medium /fluting . 
 
S/No.  Characteristic s Requirement s Test method  
(see clause 2)  Product range  (Nominal grammage , g/m2) 
i. Gramma ge, 
g/m2, ± 5 %  100 110 120 130 140  150 175 200 225 250 275 300 TZS 81  
ii. Moisture 
content, %, m/m    6 - 8.5 TZS 8 3  
iii. Thickness, 
micron, min  200 TZS 891 
iv Bursting 
Stren gth, 
Kg/cm2, min 
 2.4 2.65 2.9 3.1 3.4 3.6 3.8 4.3 4.5 4.6 4.8 4.9 TZS 79  
v. Burst Index, 
KPa.m2/g, min  2.4 TZS 79   
  ©TBS 20 19 – All rights reserved   vi. Bulk, cc/g, min 1.6 TZS 891 
vii. R.C.T, KN/m, 
CD, min  0.82 0.90 1.05 1.12 1.35 1.51 1.77 1.97 2.00 2.10 2.30 2.50 ISO 12192  
viii S.C.T, KN/m,  
CD, min  1.80 1.90 2.04 2.14 2.38 2.55 2.98 3.10 3.20 3.40 3.60 3.80 ISO 9895  
ix. Cobb 60 
second s, g/m²,  
270C, Top side , 
max  100  TZS 423  
x. Cobb 60 
seconds,  g/m², 
270C, W ire side, 
max   100                                                     TBS/CDC1 0(6621) P 3   
 
©TBS 20 19 – All rights reserved                                                                                                   1  
5   Sampling  
 
5.1 Sampling methods shall be carri ed out as pre scribed in T ZS 80 .  
 
5.2 Number of Tests  
 
Each of the rolls/packages s elected from the lot s hall first be e xamined for the requ irements  given 
in 4.1 and 4.2. Then a sheet of suitable size from rolls shall be cut, taking at least the top three 
layers. Test pieces shall  then be cut from sheets for testing requirements mentione d in 4.1 and 
4.2. Tests for these cha racteristics except pH shall  be con ducted individual ly on each of the 
sample sheet. A roll or sheet not meeting the requirements for any one or more of these 
characteristics shall be considered as defective. Test for pH  shall be conducted on  composite 
samp le.  
 
5.3 Criteria f or confo rmity   
 
A lot shall be d eclared as conforming to the requirements of this standard  if the requirement s in 
clause 4  are satisfied and if the number of defective roll and sheets does no t exceed the 
acceptance number . This acceptan ce number shall depe nd on th e size of the sample and  shall 
be equal to 0 if the sample size is less than 13. It shall be equal to 1 if the sample siz e is greater  
than or equal to 13.  
 
6   Test methods  
 
Samples of corrugating medium for corr ugated board  shall be conditioned i n accord ance wi th 
TZS 82 /ISO 187 . 
 
7   Packaging and marking  
 
7.1 Packaging  
 
7.1.1  Packaging requirements will vary according to the roll ’s diameter and width , corrugating 
medium for corrugat ed board  shall be packed in ro lls on a core o f 75 to 100 mm insid e diamet er 
and in length equival ent to the width of paper, with a wooden  or plastic plug  at each extending to 
a minimum of 75 mm into the cor e.  
 
7.1.2 Corrugating medium /fluting   shall be p ackaged in suitable material t hat protects it  from 
dust, moisture  and dir t durin g transportation,  storage and normal use.  
7.2 Marking  
 
7.2.1 Each  roll shall be legibly and indelibly marked with  the followi ng: 
 
a) Description  and the paper grammage (actual );    
b) Batch number or co de number ; 
c) Machine direc tion; 
d) Month  and yea r of manufacture ; 
e) Diameter and wi dth of   roll; 
f) Weight in  Kg of the roll including the mass of the core and plugs ;  
g) country of ori gin/manufact ure; and  
h) Name an d physical address of the manufacturer or local distri butor and  registered 
trademark . 
 
     
 
 
©TBS 20 19 – All rights reserved