TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1 DRAFT TANZANIA STANDARD  
 
 
 
 
 
 
 Specification s for waxed cartons for packaging of ice -cream  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARDS  
   
                                  TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1 0.  Foreword  
A variety of cartoons is being used  in the country for packing ice-cream . This standard is i ntended to 
achieve standardization in the carto ns and at the same time ensure safe and hygienic packaging of ice -
cream.  This standard  is intended to achieve sta ndardization in the cartoo ns and at the same time ensure 
safe and hygienic packaging of ice -cream. 
In preparation of this draft standard assistance was drawn from IS 7162:1973 specification for waxed 
cartons for packaging of ice -cream  published by bureau of Indian standards (BIS)   
In reporting the result of a tes t or analysis made in accordance with this standard, if the final values 
observed or calculated, is to be rounded off it shall be done in accordance with TZS 4 Rounding off 
numerical values.  
1.  Scope  
This standard specifie s requirements for waxed carton s for intimate packaging of ice cream a s well as 
choc olate bars 
2.  Normative References  
The following referenced standards referred to in the text in such a way that some or all of their content 
constitutes requirements of t his standard.  For dated refer ences, only the edition cited applies. F or 
undated references, the latest edition of the referenced document (including any amendments) applies.  
 TZS 80: Paper – Sampling methods for testing  
 TZS 890: Paper and board – Deter mination of roughness / smooth ness (air leak methods) – Part 1:          
    General method  
TZS 2146: Corrugated fibreboard boxes for general packaging - Specification  
TZS 2290: Waxed paper for packaging of confectionery - Specification  
3.  Terms and D efinitions   
3.1 petroleum w ax (or paraffin wax )  
is a soft colorless s olid derived from petroleum , coal or oil shale  that c onsists of a mixture of hydrocarbon  
molecules containing between C20 and C40.  
3.2 melting Point (Cooling Curve) of Petroleum Wax . 
 The temperature at which petroleum wax first show s a minimum rate of temperature change when 
allowed to cool under prescribed conditions.  
3.3 stiffness  
is the extent t o which an object resists  deformation  in response to an applied  force                                    TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1 4.  materials  
4.1 paperboard  
4.1.1 The paperboard used for the cartons shall be a food grade material  capable of being waxed, made 
from virgin chemical wood pulp .  
4.1.2 thickness  
The thickness of the unwaxed board shal l be not less than 0.30mm  when measured in accordance with  
method detailed in Annex C  
4.1.3 wax contents  
The minimum wax  content of the waxed board s hall be 5.0g/m2 on each side. The  minimum total wax 
content of the board shall be 10.0g/m2 when determined by the method given in annex A.  
4.1.4 Stiffness  
The stiffness of the waxed board shall be not less than 110g.cm in mac hine direction and 40g.cm in cross 
direction when determined by the method prescribed in annex B  
4.2 Ink  
The ink used for printing the carton shall be  
i. commercially free from heavy elements such as lead and chromium .  
ii. suitable for food packaging and  
iii. fast to light and wax.  
iv. shall not h ave any residual odour, when tested  as prescribed in TZS 2290  
4.3 Coating Materials  
4.3.1 wax  
The wax for coa ting the board shall be extra refined  food grade paraffin wax with melting point not lower 
than 60 ºC 
4.3.2 varnish and l acquer  
The material used shal l be food grade  
4.4 adhesive  
The adhesive used to form and seal the carton shall withstand a temperature of -35°C and shall be non -
toxic 
4.5 Odour and Taint  
The composition of the board, ink, coating materials and adhesive sh all not cause any effect on t he 
flavour, odour and appearance of the product packed  
4.6 toxicity                                   TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1 The composition of the board, ink, coa ting materials and adhesive shall not introduce into the product 
packed any substance which is injurious to health or wh ich might contaminate the pac ked product  
5.    Dimensions  
Shall be agreed between the purchaser and supplier  
6.  Deep freezing  
the wa xed board carton shall withstand a deep -freeze conditions ( -35°C) for a period of 30 days  
7. prefolding  
in order to pro duce  suitable forming of the  carton, the prefolding shall be such that the glue seams are 
square and glue spots are absent  when examined  as describe in TZS 890   
8. packing and marking   
8.1       Packing  
The cartons shall be supplied in collapsed form and  ready to use after erection . They shall be packed in 
protective transit containers as agreed to between the supplier and the purchaser.  
8.2 Marking and labeling  
8.2.1 Individual Cartons  
Each carton shall be marked with the following information  Trade -mark or brand name of the pro duct  
a. Manufacturers  or packer ’s name and address  
b. Batch or code number, and  
c. Any other information required by  the food safety rules of the importing country   
  Note : trade mark/name/contacts of the manu facturer of the cartons shall be included in the labe l 
8.2.2 transit container  
Each protective transit container shall be marked with the following information in  respect of cartons 
packed in it:  
a. Name or trade mark of the manufacturer  
b. Name of the product to be packed  
c. Batch number ; and  
d. Date or year of manu facture  
8.2.3 the cartons and transit containers may also be marked with TBS C ertification Mark 
 
 
                                  TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1  
 
 
ANNEX A  
METHOD FOR DETERMINATION OF WAX CONTENT  
A-0.  principle  
A-0.1 A known amount of waxed board cuttings is extracted wit h ca rbon tetrachloride in a Soxhlet 
apparatus. The extract is evaporated to dryness and the residue is re -extracted with alcoholic potass ium 
hydroxide and evaporated to dryness. The dried mass is then dissolved in water and petroleum ether and 
the two laye rs are separated. The petr oleum ether layer is evaporated to dryness and the residue 
weighed.  
A-1. Apparatus  
A-1.1 Soxhlet  apparatus  
A-1.1 separating funnel  
A-2 reagents  
A-2.1 carbon tetrachloride  
A-2.2 alcoholic potassium hydroxide solution -Approximat ely 0.5N  
A-2.3 petroleum e ther- boiling range 40 to 60°C  
A-3 Procedure  
A-3.1 weigh accurately about 10g of the specimen, cut it into str ips and give numerous small crosswise 
folds to each strip. Extract the strips in a Soxhlet apparatus with carbon tetrac hloride for four hours or until 
the wax is all removed  
A-3.2 evaporates  the extract to dryness on a water -bath, add  25mL of alcoholic pot assium hydroxide 
solution and again evaporate to dryness. Cool the residue, take it up with petroleum ether and water ( See 
Note) and transfer to a separating funnel. Shake the contents of the funnel thoroughly and then allow the 
two layers to separate comp letely. Draw off the water layer into another separating funnel.  
 Note: the volume of the petroleum ether should be abo ut 25mL and that of water about 150mL. the     
  water should contain a small amount of sodium chloride to prevent emulsification . 
A-3.3 Re-extract the water layer one or more times, as may be found necessary, with fresh 25mL aliquot 
of petroleum ether.  
A-3.4 wash the petroleum eth er extract obtained as in A -3.2 and A -3.3 with fresh 100mL aliquot of water 
until the water layer is perfectly clear.  Addition of a concentrated solution of sodium chloride may be 
found necessary while washing.  
A-3.5 transfers  the pe troleum ether extract to a weighed evaporating dish or flask and evaporate to 
dryness. Dry at 103±2ºC  for 1 hour and weigh.                                   TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1 A-4. Calc ulation  
A-4.1 calculate the wax content of the board by the following formula:  
𝑊𝑎𝑥,𝑃𝑒𝑟𝑐𝑒𝑛𝑡 𝑏𝑦 𝑀𝑎𝑠𝑠=100 (𝑊3− 𝑊2)
𝑊1 
 
Where:   
W3 = mass in g of the evapor ating dish or flask with residue ( A-3.5) 
W2 = tare in g of the evaporating dish or flask (A -3.3), and  
W1 = mass in g of the specimen tak en for the test (A -3.1) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                  TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1  
 
 
ANNEX B 
DETERMINATION OF STIFFNESS OF THE WAXED BOARD  
B-0. PRINCIPLE  
B-0.1 One end of a rectangular test piece is  gripped and a bending force is  applied to the test piece at a 
distance of 50mm from the grip . The bending moment exerted b y the force for deflectin g the test piece 
through an angle of 15º is measured.  
B-1. Appar atus 
B-1.1 any instrument which is capable of applying a bending force to the test piece and measuring the 
bending moment in gf.cm, and i s provided with jaws for gripp ing one end of the test p iece across full 
width with the length of the portion gripped no t less than 13mm, and is complying with the following 
requirements may be used:  
Bending angle  15º±10’  
Bending length  50±2.50mm  
Rate o f bending  15º in not less tha n 2.5 seconds and 
not mor e than 30 seconds  
 
B-2 sampling and conditioning  
B-2.1 repres entative sample shall be drawn and conditioned as given in TZS 80   
B-3 procedure  
B-3.1 cut a minimum of 16 test pieces measuring 38 ±0.3m m in width and minimum 70mm in  length from 
each of the machine and cross directions of each specimen.  
B-3.2 deflect eac h test piece, gripping it firmly in the jaws of the instrument, through an angle of 15º to 
one side of the unstressed position and then i mmediately bring the test piec e to its original positio n and 
deflect it through an angle of 15º to the other side of th e unstressed position. In each direction, read the 
bending moment as soon as the 15º deflection is reached.    
B-3.3 when the instrument employed is so designed that t he deflection is possible  to only one side of the 
unstressed position, for each of the ma chine and cross directions drawn double the number of test pieces 
specified in B -3.1 and test half of them with one particular face of th e board towards the direction of 
deflection and the oth er half with the other face. Do not re -use any test piece after it has been removed 
from the instrument jaws  
B-3.4 records the readings separately for the machine and cross directions  
B-4 calculation  
B-4.1 for each of the machine  and cross direction , calculate the arithmetic mean of the readings correct to 
one place of decimal and report it as the stiffness in gf.cm of the board for that direction.                                   TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1  
 
Annex C  
Determination of thickness of paper  
C.1 App aratus  
C.1.1 micrometer - Prop erly calibrated dead weig ht micrometer, fitted with a dial gauge reading correct to 
0.01m m or, alternatively, a micrometer fitted with a dial gauge reading correct to. 0.000 5 in. A screw 
micrometer shall not be used on a yiel ding material like paper.  
C.1.2 shell-holder - The devi ce consists of two parallel plane faces, which are parallel to w ithin 0.005 mm 
and constrained to move apart in the direction perpendicular to their planes. The smaller of the faces, 
which generally mo ves, in circular, with 14 to 1 6.5mm diameter, correspon ding to an area of 160 to 
210mm2. The moving member is geared to  the micrometer dial gauge indicator reading correct up to 
0.01mm  
C.2 procedure  
C.2.1 for a sheet having a thickness of below 0.25mm -Take a pack of not less than 5 sp ecimens or test 
pieces.  cut to a size of 20x25 cm.  
the number of specimen or test piece s in each pack shall be so chosen that all the sheets (See 3.4) are 
represented in the test.  Each specimen or test piece to be tested sh all be independent of the rema inder, 
that is, one speci men or test piece folded and inserted in the pack to form two or  more specimens or test 
pieces shall not be used. Raise the moving member of the apparatus by means of the lever, introduce 
this pack and  relax the lever gently to ena ble the moving member to fall down and touch the pack and 
exert a steady pressure of 1.00 ± 0.10 kg/cm2. Test at 5 places, near the edge as well as in the central 
portion of the specimen or test piece, to check for uniformity o f thickness.  
C.2.1.1 Report -Take the average of 5 readi ngs as the thickness of the pack. Take mean of the average of 
all the packs. Divide the mean of the average and the highest and lowest values by the number of 
specimens or test pieces contained in each  pack and report these as the average thickness of each  
specimen or test piece and the range of variation.  
C.2.2 For S heets Having a Thickness of More than 0·25mm - Test each specimen or test piece singly and 
test a piece each from all the specimens. Rais e the moving member of the app aratus by means of the 
lever, introduce the specimen or test piece and relax the lever ge ntly to enable the moving member to fall 
down and touch the specimen or test piece and exert a steady pressure of 1.00 ± 0.10 kg/cm2. Tes t at 5 
places, near the edge a s well as in the central portion of the specimen or test piece, to check for 
uniformity o f thickness.  
C.2.2.1 Report -Take the average of 5 readings on each specimen or test piece as its thickness. Take the 
mean of the average of all specimens or test piece s. Report the mean of the  average, maximum and 
minimum value of the readings as the avera ge thickness and range.                                   TBS/AFDC 2( 226) CD2 
                                           ICS 67:250  
  
 
©TBS_202 1  
 
C.3 Precautions  
C.3.1 Before starting, it is essential to see that there is no clearance between the two para llel faces and 
that when the m oving face touches the ot her parallel plane face, the pointer on the dial is at zero read ing. 
The pointer should be brought to zero position, if necessary.  
C.3.2 Care shall be taken to see that the sheets are free from folds and creases