TBS/CDC1 0 (6260) P3 
  
 
© TBS 2 020 All right Reserved                                                                 First Edition 2 020                                                                
  
DRAFT TANZANIA STANDARD  
 
 
 
 
 
 
 
 
TBS/CDC -10 (6260) P3 Post Card  — Specification   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARD STBS/CDC10  (6260) P3 
 
© TBS 20 20 - All rights reserved                                                                       First Edition 2020                                                                    0   Foreword  
 
This Draft Tanzania Standard is being developed by Station ery and Paper  Products Technical 
Commi ttee under sup ervision of the Chemical Division Standards Committee and it is in 
accordance with the procedures of the Bureau.  
 
 
This Draft Tanzania Standard is the  first edition of post card  – Specification .  
 
 
This draft Tanzania Standard has been prepar ed with assist ance drawn  from the following 
document s: 
 
 
IS 15307 :2013 Post Card  - Specification,  published by India Bureau of Standards.   
 
The assistance obtained from the above source is hereby acknowledged with thanks.               
 
For the purpose of deciding wheth er 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  (see clause 2).  
 
 
 
 
                                                                        TBS/CDC10  (6266 ) P3  
 
©TBS 20 19 – All rights reserved                                                                                                   1  
 
DRAFT TANZANIA STANDARD                TBS/ CDC 1 0 (6260) P3 
 
Post Card  – Specification  
 
1   Scope  
 
This draft Tanzania Standard specifies the requirements,  sampling,  and test  methods  of post 
card.  
 
2   Normative references  
 
The following documents, in whole or in part, are normativ ely 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 document (including any amendments) applies.”  
 
TZS 4:  Rounding of f numerical val ues 
 
TZS 80: Paper – 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 fo r monitoring th e atmosphere and conditioning of samples  
 
TZS 423: -ISO 535 ; Paper and board — Determination of water absorptiveness - cobb 
method  
  
TZS 747: - ISO 1974 , Paper — Determination of tearing resistance — Elmendorf method  
 
TZS 891 : -ISO 534; Paper  and board — Determination of thickness, density and specific 
volume  
             ISO 2492 -2: Paper and board — Determination of bending resistance — 
             Part 2: Taber -type tester  
ISO 8791 -2: Paper and board - Determination of roughness/smoothness (air leak  
metho ds) Part 2: Bendtsen method  
            ISO 5636 -5: Paper and board - Determination of air permeance (medium range) —  
            Part 5: Gurley method  
 
 
 
 
 
  
  ©TBS 20 19 – All rights reserved   3   Terms and d efinitions  
 
For the purpose of this  draft Tanzania Standard the fo llowing definiti ons shall apply:  
 
3.1 cross direction (CD)  
direction in the paper that is at right angles to the machine direction  
 
3.2 defective  
set of test pieces that fails in one or more respects to comply with the relevant requirements of 
the standar d 
 
3.3 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 with TZS 82/ISO 187  
 
3.4 nominal grammage (substance)  
the value of the mass per unit area used  for reference purposes (i.e. when purchasing material)  
 
3.5 actual grammage (substance)  
the value of the mass per unit area determined by testing  
 
3.6 lot  
one or more nominally identical package of paper, the paper having been made on  the same 
equipment under essentially the same conditions, from one manufacturer, and submitted at any 
one time for inspection and testing . 
 
3.7 machine direction (MD)  
direction in a paper or a board parallel to the direction of travel of the web on the p aper o r board  
machin e 
 
3.8 post card  
is a recta ngular or any shape design  piece of thick paper or thin cardboard  intended for writing 
and mailing without an envelope   
 
 
 
 
 
 
 
 
  
©TBS 20 19 – All rights reserved                                                                                                    3    
4   Requirements  
 
4.1 General requirements  
 
4.1.1  The post card   shall be   made fro m 100 % sulphat e pulp ( bleached or unbleached) , or from 
combination of  any other material that will ensure compliance with the requirements given in 
Table 1.  
 
4.1.2 The surface  of post card  shall be  machine  glazed (MG) or machine finished (MF)  or 
machin e calendared . The surface should also be receptive to printing  and may suitably and 
distinctly printed as  agreed to between the purchaser and the supplier .  
 
4.1.3  The surface  shall be smooth,  even surface on both sides and shall be suitable for writing in  
ink and good c lass letter printing.  
  
4.1.4 The post card  shall be free from  fibre bundles,  tears,  shives, foreign matter, specks, holes, 
blemishes, grease marks , perforation type of defects  and other  visible defects and shall be 
uniform in thickness .  
 
4.1.5  Post card  shall be a flat, generally rectangular in shape  of the pulp board  and made from 
one sheet of paper  or any other design shape  as agreed between the purchaser and the supplier . 
No part of a post card which is laid on a flat surface shall prot rude more than 8mm from the 
surface . 
 
4.2 Specific requirements   
 
4.2.1 Post card  shall comply with the relevant requirement s given in Table 1 when tested in 
accordance with the method specified therein.  
4.2.2  The nominal substance of post card  shall be as  200 g/m2 .   A tolerance of ± 5 percent shall 
be permis sible on the nominal substance when determined in accordance with TZS 81 .                                                                                                                                                            
 
4.2.3  The thickness of the  post card  shall be  in between 0.22 mm and 0.25 mm . A tolerance of ± 
0.005 mm shall be permitted when tested in accordance with TZS 891 . 
 
Table 1 – Specific requirements for  post card  
 
S/No.  Characte ristics  Require ments  Test me thod  
(see clause 2)  
i. Stiffness, Taber  150 in direction 
of grain  
 40-80  ISO 2492 -2 
150 across the 
grain        20-40 
ii. Tear index , mNm2/g, MD, 
min 1.27  
TZS 747  
iii Cobb 60 seconds,  g/m²,  270C, 
(top and wire  side), Max      20 TZS 423  
iv Porosity ( Gurley ), ml/min, 
min  50 ISO 563 6-5  
  ©TBS 20 19 – All rights reserved   v Smoothness (Bendtsen), 
ml/min,  50-120 ISO 8791 -2 
 
 
5 Dimension  
 
5.1 Size - The post card shall be  of size   90 mm x 140 mm  or as  agreed between supplier and 
the client:  A tolerance  of ± 2 mm shal l be perm itted on size.  
 
6   Sampling  
 
6.1 Sampling methods shall be carri ed out as prescribed in TZS 80 .  
 
6.2 Number of Tests  
 
Each of the packages selected  from the lot  shall first be examined for the requirements given in 4 
and 5. Then  a piece of  suita ble size from -post card  shall be cut, taking at least the top three 
layers. Test pieces shall then be  cut and  tested  as per  requirements mentioned in 4 and 5. A-post 
card not meeting the requirements for any  one or more of these characteris tics shall be 
considered as defective.  
 
6.3 Criteria for conformity   
 
A lot shall be declared as conforming to the requirements of  this standard if the requirement s in 
clause 4 and 5  are satisfied and if the number of de fective roll and sheets does not exceed the 
acce ptance number. This acceptance number shall depend on the 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 size is greater 
than or equal to 1 3.   
 
7   Test methods  
 
Samples o f post card  shall be conditioned in accordance with TZS 82 /ISO 187.  
 
8   Packaging and marking  
 
8.1 Packaging  
 
8.1.1  The post card  shall be pack ed in the form  of sheets as agreed to between the purchaser 
and th e supplier . 
 
8.1.2 Post card  shall be packaged  in suitable ma terial that protects it from dust, moisture and dirt 
during transportation, storage and normal use.  
 
8.2. Marking  
 
8.2.1 Each  package shall  be legibly and indelibly marked with the following:  
 
a) grammage (actual);   
b) size of  the post card ; 
c) number of cards in the package; and  
d) name and physical address of the manufacturer or local distributor and registered 
trademark . 
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