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 Tbs                                                   TDC 3 (6311 ) P3 
 
    
 
                           DRAFT TANZANIA STANDARD           
 
 
 
 
Textile – Specification for mosquito nets:  Part 1: Nets made from 100 
% Polyester yarn  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ii 
 Foreword  
This Draft  Tanzania Standard  specifies the requirements of two types of mosquito nets made out of 100 
% polyester yarn.  
Mosquito nets which are available in the market can be categorized according to their sizes. In 
determining the quality of this widely used customer item, more emp hasis should be given not only to the 
netting fabric but also to stitching and other attachments.  In that case shape, size and dimensions are 
very important. This Draft  Tanzania Standard  which outlines requirements for manufacture and 
workmanship of mosqu ito nets will guide  the manufacturer and protect the buyer.  
 
In the preparation of this Draft Tanzania Standard  the valuable assistance derived from the 
following organizations are gratefully acknowledged.  
 WHO approved specifications, published by World  Health Organization .  
 IS 9886:1981, Specification for mosquito nets  published by the Bureau of Indian Standards.  
 SLS 1061:1995, Specification for mosquito nets  published by the Sri -Lanka Standards Institution.  
Company standards from local manufacturer s.  
 
  
 
1 
 1. SCOPE  
 
This Draft Tanzania Standard  prescribes the requirements of two types of mosquito nets namely 
rectangular mosquito nets and circular or conical shaped mosquito nets.  These may be bleached or dyed 
as specified in the contract or order.  
2. NORMATIVE REFERENCES  
The following referenced d ocuments are indispensable for the app lication of this Draft Tanzania  
Standard.  
TZS 21 , Textiles – Determination of mass per unit length and per unit area of knitted or 
woven fabric  
 
TZS 26 , Textiles – Determination of conductivity, pH, water soluble matter, chloride 
and sulphate in aqueous extracts  
 
TZS 40 , Textiles – Determination of colour fastness – colour fastness to daylight  
 
TZS 44 , Textiles – Determination of length and width of fa brics  
 
TZS 139 , Textiles – Determination of linear density of yarn removed from fabric free 
from added matter  
 
TZS 137 , Textiles – Determination of dimensional change of woven and knitted fabric 
and garments – machine method  
 
TZS 167 , Textiles – Determination of colour fastness – colour fastness to washing – 
Test 3  
 
TZS 265 , Test method for testing strength of yarn from packages  
 
3. REQUIREMENTS  
 
3.1 Manufacture  
 
3.2 Fabric  
 
3.2.1 Netting  
 
The fabric used for the manufacture of mosquito nets shall conform to constructional and 
performance requirements prescribed in table 1.  
3.2.2 Top and other attachments  
 
The fabric used for the top of the mosquito nets and other parts such as bands, frill s tying tapes 
etc. and which may be used to decorate, reinforce and strengthen the net shall be made from 
finished cotton or 65/35 polyester cotton/rayon fabric having a mass no t less than 120 g/m2.  The 
colour of the fabric shall match with the colour of the netting.  
3.3 Defects  
 
The mosquito nets shall be free from defective holes having diameter more than the normal hole 
size of the netting), stitching defects, stains and observable defects.  
 3.4 The colour  
The fabric shall be in white or any colour w hich is agreeable between the purchaser and supplier.  
 
3.5 Sizes and dimensions  
 
3.5.1  The mosquito net shall be of any of the following sizes:  
a) Small  
b) medium   
 
2 
 c) large  
d) extra large  
3.5.2  The dimensions of the mosquito nets shall be as given in table 2 unless otherwise 
specified in the agreement reached between the purchaser and the supplier.  
3.6 Colour fastness  
The colour fastness of mosquito netting and attachments shall conform to the  requirements given in Table 
3.  
 
3.7 pH value  
The pH  value of mosquito netting shall be between 6.0 and 8.5.  
 
3.8 Dimensional change  
The dimensional change of mosquito netting shall be not more than 5 %.  The dimensional change of 
the fabric of the top attachme nt shall not be more than 2.5 %.  
 
3.9 Workmanship  
 
3.9.1  The mosquito net shall be rectangular or conical in shape unless otherwise agreed to between 
the supplier and the purchaser.  
 
3.9.2  The body of the mosquito net shall be made of not less than four pieces assembled together to 
obtain the required shape of the mosquito net.  
 
3.9.3  The top of the mosquito net which shall be in minimum of four equal pieces of fabric shall be 
stitched together s o as to strengthen the top of the net.  All assembling parts shall be reinforced with 
tapes of the same material.  
 
3.9.4  The net shall be provided with suitable number of tying tapes (spreaders) of which the width is 
not less than 10 mm and fixed at the top at 8 places equally spaced to tie the net to the ring.  
 
3.9.5  The top support ring shall be of any suitable material e.g.  Copper coated rust proof, which has 
sufficient strength to withhold the net when it is hung at the required position.  
 
3.9.6  A suspension ring mad e out of any suitable material and fixed to the upper centre of the top or 
any other suitable measures shall be provided to hang the net during its usage.  
 
Table 1 – Requirements for polyester (multi -filament) mosquito netting (rectangular or conical 
shap ed  
S/NO.  Characteristic  Requirement  
1 
 
2 
 
3 
 
4 
 
5 Material  
 
 Linear density (den)  (min)  
 
Mesh size (holes) (min)  
 
Mass per unit area.  G/m2, min.  
 
Bursting strength, Kpa (min)  100 % Polyester ( multifilament ) textured yarn  
 
75 denier or 100 denier  
 
156 per sq. in (25 per cm2)  
 
30 gm/m2 for 75 deniers , 40 gm/m2 for 100 
denier  
 220 Kpa for 75 denier, 250 K pa for 100 denier  
 
 
 
  
 
3 
  
 
 
Table 2 – Sizes and dimensions of mosquito nets:  
Rectangular  
Description  Width  Length  Height  
Double  130 cm 180 cm  150 cm 
Family  180 cm  180 cm  150 cm  
Large Family  190 cm  180 cm  150 cm  
 
a) Conical  
Description  Circumference  Height  Roof(diameter)  
Small  185 cm 740 cm 56 cm  
Medium  210 cm 900 cm 56 cm  
Large  240 cm 1825  cm 65 cm  
 
Note – The sizes and dimensions mentioned above are for guidance purposes only. They 
should not be considered as prime requirement of this specification.  
 
Table 3 – Requirements for colour fastness  
S/no.  Colour fastness to:  Minimum Rating  Test Method  
1.  
2.  a) daylight  
b) washing  4  
4  TZS   40:1979 TZS 
167:1979  
 
 
4. PACKING AND MARKING  
 
4.1 Packing  
 
Each mosquito net shall be packed in a polythene bag  
 
4.2 Marking  
 
The following information shall be marked or labelled legibly and indelibly on each individual 
package:  
a) Name of the product  
b) Size of the net  
c) Name and address of the manufacturer  
d) Brand name if any  
e) Batch identification mark.  
f) Country of origin.  
 
5. SAMPLING  
 
5.1 Lot  
 
In any consignment all the pieces of mosquito netting belonging to one batch of manufacture or 
supply shall constitute a lot.  
 
  
 
4 
 5.2 Scale of sampling  
5.2.1 Samples shall be tested from each lot for ascertaining its conformity  to the requirements of 
this specification.  
 
5.2.2  The number of pieces to be selected from a lot shall be in accordance with Table 4.  
 
Table 4 – Scale of  sampling  
No. of pieces in the 
lot No. of pieces to be selected  
Up to 8  
9 to 15  
16 to 25  
26 to 50  
51 and above  2 
3 
4 
5 
7 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
5 
 
 
ANNEX A  
 
Dimensions and manufacturing details of nets.  
 
Figure1: Rectangular mosquito net  
  
 
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Fig 2 Conical  mosquito net .