TBS/CDC1 0 (6266 ) P3 
  
 
© TBS 2 020 All righ t Reserved                                                                 First Edition 2 020                                                                
  
DRAFT TANZANIA STANDARD  
 
 
 
 
 
 
 
 
TBS/CDC -10 (6266)  P3 GLASSINE PAPER  — SPECIFICATION  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARD STBS/CDC10  (6266 ) P3 
 
© TBS 20 20 - All rights reserved                                                                       First Edition 2020                                                                    INTRODUCTION  
 
Glassine paper is used for packaging of confectionery, snacks, dairy products, dehydrated  
foods, toil etries, pharmaceuticals, etc.  
 
Glassine paper is obtained from highly hydrated  pulp and subsequently highly super -calendered.  
It is translucent (may be colour ed or  rendered opaque while in stock), very smooth  and shiny on 
both sides and substantially greas eproof . 
 
The paper is resistant to oil and grease.  Because of its high density and glass -like surface, it is 
resistant to moisture and growth of mould  also. I t also provides  a barrier against escape of  aroma 
and flavour of products packed in it because  of its low air permeability. Due to lack  of stretch 
characteristics as well as the generation  of static and smooth surfaces free from lint and  fuzz of 
small fibr es, the paper o ffers a good printing surface. It is also suited for conversion processes 
like meta llizing, heat seal lacquering and lamination with foils and polyethylene.  TBS/CDC10( 6266 ) P3 
  ii ©TBS 20 20 – All rights reserve d  0   Foreword  
 
This Draft Tanzania Standard is being developed by Station ery and Paper  Products Technical 
Committee unde r supervision of the Chemical s Division al Standards Committee and it is in 
accordance with the procedures of the Bureau.  
 
 
This Draft Tanzania Standard is the  first edition of glassine  paper – Specification .  
 
 
This draft Tanzania Standard has been prepare d with assistance drawn  from the following 
document s: 
 
 
IS 12490 :2013 Glassine  Paper - Specification,  published by India Bureau of Standards.   
 
The assistance obtained from the above source is hereby acknowledged with thanks.               
 
For the purpose  of deciding whether a particular requirement of this Tanzania Standard is 
complie d 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 20 – All rights reserved                                                                                                   1  
 
DRAFT TANZANIA STANDARD                TBS/CDC 1 0 (6266 ) P3 
 
Glassine  Paper – Specificat ion 
 
1   Scope  
 
This draft Tanzania Standard specifies the requirements,  sampling,  and test  methods  of glassine  
paper .  
 
2   Normative references  
 
The following documents, in whole or in part, are normatively referenced in this document and a re 
indispensabl e for its application. For dated references, only the edition cited applies. For un dated 
references, the latest edition of the referenced document (including any amendments) applies.”  
 
TZS 4:  Rounding off numerical values  
 
TZS 79: - ISO 275 8: Paper – Dete rmination for bursting strength  
 
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 for monitoring the atmosphere and conditioning of samples  
 
TZS 83: -ISO 287; Paper and board — Determination of moisture content of a lot — 
Oven -drying method  
 
TZS 423: -ISO 535 ; Paper and board — Determination of water absorptive ness - cobb 
meth od 
  
TZS 747: - ISO 1974 , Paper — Determination of tearing resistance — Elmendorf m ethod  
 
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 an d board — Determination of thickness, density and specific 
volume  
 
ISO 6588 -1: Pape r, board and pulps — Determination of pH of aqueous extracts — Part 
1: Cold extraction  
  
  ©TBS 20 20 – All rights reserved   3   Terms and d efinitions  
 
For the purpose of this  draft Tanzania Sta ndard the fo llowing definitions shall apply:  
 
3.1  bursting strength  
maximum uniformly distributed pre ssure, applied  at right angles to its surface, that a test piece of 
paper o r board will stand, under specified test conditions  
 
3.2  glassine paper    
paper obtain ed from highly hydrated  pulp and subsequently highly super -calendered.  It is 
translucent (may be c oloured or  rendered opaque while in stock), very smooth  and shiny on both 
sides and substantially greaseproof . 
 
3.3 cross direction (CD)  
direction in the pape r that is at ri ght angles to the machine direction  
 
3.4 defective  
set of test pieces that fails i n one 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 th e specified met hod of test and expressed in 
grams per square meter  and conditioned in accordance w ith TZS 82/ISO 187  
 
3.6 nominal grammage (substance)  
the value of the mass per unit area used for reference purposes (i.e. when purchasing material)  
 
3.7 actual grammage (su bstance)  
the value of the mass per unit area determined by testing  
 
3.8 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 a ny 
one time for inspection and testing . 
 
3.9 machine direction (MD)  
direction in a paper or a board parallel to the direction of travel of the web on the paper or board  
machine  
 
 
 
 
  
©TBS 20 20 – All rights reserve d                                                                                                   3    
4   Requirements  
 
4.1 General requirements  
 
4.1.1 The su rface shall be machine glazed (MG) or machine finished (MF) . The surface should 
also be receptive to printing.  
  
4.1.2 The papers shall be free from  fibre bundles,  tears,  shives, foreign matter, specks, holes, 
blemishes, grease marks  and other  visible defe cts and shall b e uniform in texture.   
 
4.1.3 The paper shall be of  reasonably good formation or uniform formation, thickness and 
substance.  
 
4.1.4  The paper shall be free from any objectionable ta int or odour . 
 
4.2 Specific requirements   
 
4.2.1 Glassine pap er 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 glassine paper shall be as agreed  to between the purchaser and 
the supplier . A tolerance  of ± 5 perc ent shall be pe rmissible on the  nominal substance when 
determined in accordance  with TZS 81 . 
 
4.2.3 The thickness of the paper shall be as agreed to between the purchaser and the supplier. A 
tolerance of ± 0.005 mm shall be permitted when tested in accorda nce with TZS 89 1. 
 
Table 1 – Specific requirement s for glassine paper  
 
S/No.  Characteristics  Requi rements  Test method  
(see clause 2)  
i. Moisture content, %, m/m  6 – 7 TZS 83   
ii. pH,  4.5 - 5.5   ISO 6588 -1 
iii. Tensile index, Nm/g , MD, 
min. 500 TZS 748 -2  
iv.  Tensil e  index, Nm/g , CD, 
min. 300 
v. Tear index , mNm2/g, MD, 
min 1.25  
TZS 747  
vi. Tear index , mNm2/g, CD, 
min 1.35 
vii. Burst Index, KPa.m2/g, 
Dry, min  3.7  
 TZS 79  
viii Grease resistance (both 
sides), s, min  1800  Annex A  
 
 
 
  
  ©TBS 20 20 – All rights reserved   5   Sampling 
 
5.1 Sampl ing methods shall be carri ed out as prescribed in TZS 80 .  
 
5.2 Number of Tests  
 
Each of the rolls/packages selected  from the lot  shall first be examined for the requirements given 
in 4.1 and 4.2. Then a sheet of suitable size from rolls sha ll be cut, taki ng at least the top three 
layers. Test pieces shall then be cut from sheets for tes ting requirements mentioned in 4.1 and 
4.2. Tests for these characteristics  except pH shall be conducted  individually on each of the 
sample  sheet. A roll or s heet not meetin g the requirements for any one or more of these 
characteristics shall be considered  as defective. Test for pH shall be conducted on composite 
sample.  
 
5.3 Criteria for conformity   
 
A lot shall be declared as conforming to the requirements o f  this standar d if the requirement s in 
clause 4.1 and 4.2  are satisfied and if the number of def ective roll and sheets does not exceed 
the acceptance number.  This acceptance number shall depend on the size of the sample and 
shall be equal to 0 if the sa mple size is le ss than 13. It shall be equal to 1 if the sample size is 
greater than or equal to 1 3.   
 
6   Test methods  
 
Samples of glassine paper shall  be conditioned in accordance with TZS 82 /ISO 187.  
 
7   Packaging and marking  
 
7.1 Packaging  
 
7.1.1 The paper shall be  pack ed in the form of either rolls or sheets or as agreed to be tween the 
purchaser and the supplier . 
 
7.1.2 Packaging requirements will vary according to the roll’s diameter and width, glassine paper 
shall be packed in rolls on a core of 75  to 100 mm insi de diameter and in length equivalent to the 
width of paper, with  a wooden or plastic plug at each extending to a minimum of 75 mm into the 
core.   
 
7.1.3 When supplied in sheets p ackages shall contain 500 or 250  sheets according to the size 
and weight of t he paper . 
 
7.1.4 Glassine  paper shall  be packaged in suitable ma terial that protects it from dust, moisture 
and dirt during transportation, storage and normal use.  
 
7.2. Marking  
 
7.2.1 Each  roll, ream or  package shall  be legibly and indelibl y marked with t he following:  
 
a) description  and the paper grammage (actual);    
b) batch number or code number ; 
c) month and year of manufacture;  
d) machine direction;  
e) size of sheet or the length and width of  roll;  
f) country of origin/manufacture ; and  
©TBS 20 20 – All rights reserve d                                                                                                   5   g) name and physical  address of the  manufacturer or local distributor and registered 
trademark .  
 6 Annex A  
 
(normative)  
 
Determination of grease resistance  
 
A. General - Grease resistance of paper is determined by the time taken by turpentine to 
penetrate through the paper.  
 
A.1 Apparatus  
 
A.1.1 Tube of any rigid material, 2·5 cm inside diameter and not l ess than  2·5 cm in height, with 
smoothened ends.  
A.1.2 Pipette  -Calibrated to deliver I·I m l. 
A.1.3 Round -Grained Sand - Screened to pass a 850 µm IS sieve and  be retained on a 600µm IS 
sieve.  
A.1.4 Paper  - Sheets of clay coated white papers of 100 g/m2 substance  
 
A.2 Reagents  
A.2.1  Turpentine - Coloured, water -free turpentine, prepared as follows.  
 
A.2.1.1  To 100 ml of pure gum spirits turpentine (relative density 0.860 to 0.875  at 15'5°C) add  5g 
of anhydrous calcium chloride and 1·0 g of oil soluble red d ye. Stopper the container, shake well 
and let stand for at least 10 hours. Shake occasionally. Then filter through a dry filter paper and 
store in an air -tight bottle.  
 
A.3 Test Specimen  
A.3.1  Cut representative specimens 10 cm square from the sample under  test. 
 
A.4 Procedure  
A.4.1 Not less than 10 conditioned specimens shall be used. Make an  equal number of tests on 
each side of the sample; if possible, note which is  the felt s ide and which i s the wire side.  
A.4.2 Place each specimen on a sheet of the pap er, which rests on a smooth  plane surface. 
Place  the end of the tube on the specimen and put  5 g of sand in the tube. Since the purpose of 
the tube is solely to assure  a uniform  area of the sa nd pile, remove it immediately after the 
addition of  the sand. U sing the pipette add 1 .1 ml of the coloured turpentine to the  sand and note 
the time.  
A.4.3 Move the test specimens to different positions on the paper and  examine the uncovered  
area of it for  staining, every 30 seconds for the first  2 minutes, every minut e for the next 8 
minutes, and every 3 minutes thereafter.  As soon as the first red stain appears on the paper, note 
the time. The  time elapsed, in seconds, between the applicati on of the turpe ntine and  the 
appearance of the first distinct red stain shall b e recorded as the  transudation time.  
 
A.5 Report  
8.5.1  Results shall be reported as turpentine transudation in terms of  seconds. The report shall 
include the number of specimens  tested and the  maximum, minimum, and average turpentine 
transduction. If it is  possible  to identify the two sides of the paper, results shall be reported 
separately  for specimens tested with the felt side up and with the wire side up. All  tests over 1800 
seconds shall b e reported as 1 800 + seconds and if individual  results of 1800 + are included in 
any average, such average shall be  followed by a plus sign. The average shall be reported on the 
basis of all  tests made. It is recommended that the following form be used in  reporting  results 
when possible:  
 
 
  
 7  
Table 2 – Specific require ments for grease resistance  
 
Turpentine transudation, 
seconds:  
 Felt side up  Wire side up  
Maximum  
 1800 + 1750  
Minimum  
 1500  1400  
Average of 10 tests  
 1750 + 1600  
Total averag e 
 1675 +