TDC12 (1304 ) DTZS  
             First edition
 
DRAFT TANZANIA STANDARD  
 
 
 
 
Protective Textiles – Performance requirements for rainwear and 
all-purpose, water -repellent coat fabrics – Specifications  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARDS  
 
 
 
 FOREWORD  
This Draft Tanzania Standard is issued to help manufacturers /retailers  of woven and knitted of 
housecoat and dressing -gown fabrics  to come up with products of defined quality . This Draft Tanzania 
Standard covers the requirements of rainwear and all -purpose water -repellent coat outer fabrics 
composed of any textile fib re or mixture of textile fibres .  
  
In the preparation of th is Draft Tanzania Standard, assistance was derived from:  
ASTM D7017 -14 Standard Performance Specification for Rainwear and All -Purpose, Water -
Repellent Coat Fabrics    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 1. SCOPE  
This Draft Tanzania Standard specifie s performance  requirements, test methods and sampling plan 
for rainwear and all -purpose water -repellent coat outer fabrics composed of any textile fibre or mixture 
of textile fibres.   
 
2. NORMATIVE REFERENCES  
The following referenced documents are indispensable for the application of this document. 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 off numerical values  
TZS 21: Textiles — Woven or knitted fabrics — Determination of mass per unit length and per 
unit area.  
TZS 22: Textiles — Woven fabrics — Determination of breaking load and extension.  
TZS 24: Method for determination of colour fastness of textile materials to washing: Test 4: 
severe  washing  
TZS 27: Determination of dimensional change of woven Fabrics -Cold water immersion  
TZS 40: Textiles — Tests for colour fastness — Colour fastness to light Daylight  
TZS 44: Textiles — Woven or knitted fabrics — Determination of length and width   
TZS 138: Textiles – Test for colour fastness to rubbing  
TZS 280: Textiles – Tests for colour fastness – colour fastness to perspiration.   
TZS 534: Textiles – Standard atmospheres for conditioning and testing  
 
3. TERMS AND DEFINITIONS  
For the purpose of thi s Draft Tanzania Standard, the following terms and definitions shall apply:  
3.1. rainwear fabric  
waterproof or water -resistant fabric  
 
3.2. water -repellent fabric  
fabric treated with a finish that is resistant but not impervious to penetration by water  
 
3.3. water resistance fabric  
fabric able to resist the penetration of water to some degree but not entirely.  
 
4. REQUIREMENTS  
4.1 General requirements  
4.1.1  The rainwear/coat shall  
4.1.1.1  be a hooded type coat with a full zip  or any other type of fastening  and waterproof taped 
seams . The fabric shall also be windproof/ waterproof and allow for moisture vapour 
transmission (breathability).  
 
4.1.1.2  have a high visibility silver reflective tape of not less than 50  mm wide sewn to the shell 
for night -time safety.  
 
4.1.1.3  have seams and retro -reflective tape be sealed with hot air applied on the tape to ensure 
waterproof integrity. The minimum fabric requirements shall meet the performance level 
for the fabric as listed in Table 1 . 
 
4.1.1.4  have a colour fastness be measured in accordance with the procedures in Table 1.  
 
4.2 Performance requirements  
4.2.1. The fabrics intended for rainwear and all -purpose, water -repellent coat end use sh all meet al l of 
the requirements as specified in Table 1 .  
 4.2.2  Breaking strength.  
Unless otherwise stated, the requirements given in Table 1 shall apply equally to both warp (length) 
direction and weft (width) direction,  
4.2.3  Dimensional changes  
The dimensional changes both warp and weft direction requirements before and after washing or dry 
cleaning shall apply as given in Table 1.  
4.2.4  Colour fastness  
The values specified shall be the minimum numerical ratings, determined in accordance with the 
relevant test method  as given in Table 1  and, unless otherwise stated, the requirements shall apply  to 
dyed or printed fabrics only.  
Table 1 – Requirements for rainwear and all -purpose, water -repellent coat end use  
Parameter  Requirement  Test method  
Material composition, %  Shall be as declared subject to 
a tolerance of ±2  TZS 326  
TZS 327  
Breaking strength , N, min.  150  
TZS 22   
Tearing strength, N, min   
13 
Dimensional changes, Shrinkage or 
elongation, %, max. ±3 TZS 27  
pH value  6.0 to 8.5  TZS 26  
Water repellence;  
 
Smooth -textured fabrics:  
Original  
After 5 laundering or 3 dry cleanings  
 
Rough -textured:  
Original  
After 5 launderings or 3 dry cleanings   
 
 
90 
70 
 
 
80 
70  
 
 
TZS 3114: 2021 /  
ISO 9865: 1991  
Water resistance (categories based on time 
for maximum weight increase at following 
head pressures):  
 
Shower   600mm (2 ft) for 30 seconds  
Rain        600mm (2ft) for 2 seconds  
Storm      900mm (3ft) for 5 minutes        
 
 
 
1 gram, max  
1 gram, max  
1 gram, max   
 
 
TZS 3115: 2021 /  
ISO 811: 2018  
 
 
Colour 
fastness to  Light  4 or better  TZS 23  
Washing  4 or better  TZS 24  
 
Rubbing   Dry 4 or better  TZS 138  
 Wet 3 or better  TZS 138  
Perspiration  4 or better  TZS 280  
Dye properties  
 Non-carcinogenic  
Non-allergic  TZS 2007 -2  
 5. MARKING AND PACKING  
5.1. MARKINGS  
 
The following information shall be printed on a suitable label firmly attached to each packaging:  
a) description of the material.  
b) manufacturer’s name , address or reference (initials or trademark) and if required supplier’s 
name or reference,  
c) design  number , and  
d) care label  
 
5.2. PACKAGING  
5.2.1 The rainwear and all -purpose water -repellent coat outer fabrics  shall be packed in bales or 
cases  in conformity with the procedure or as agree to between the buyer and the seller.  
6. SAMPLING  
 
6.1 Lot  
The number of products  of the same quality delivered to one buyer against one dispatch note shall 
constitute a lot.  
  
6.1.1 The conformity of the lot to the requirements of this Draft Tanzania Standard shall be 
determined based on tests carried out on the samples selected from  the lot.  
  
6.1.2 Unless otherwise agreed upon between the buyer and  the seller , the number of pieces to be 
selected at random from a lot shall be in accordance with Table 2.  
  
Table 2 – Sampling size and permissible number of non -conforming pieces  
  
 
Number of pieces  
in the lot  Sample size (No. of 
pieces to be selected)  Permissible no. Non -
conforming pieces  Sub-sample size (No. 
of pieces to be 
selected)  
Up to 25  
26 to 50  
51 to 150  
151 to 300  
301 to 500  
501 to 1000  
1000 and above  3 
5 
8 
13 
20 
32 
50 0 
0 
0 
1 
1 
2 
3 2 
2 
3 
3 
5 
5 
8