Tbs              TDC2 (5601 )P3 
 
 
 
 
 
 
 
  
 
 
 
DRAFT TANZANIA STANDARD  
Footwear — Performance  requirements  for footwear  accessories  
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARDS  
 
 
 
1 
 Draft Tanzania Standard                                TDC2  (5603) P 3 
Footwear — Performance requirements  for footwear a ccessories  
 
0. Foreword  
0.1 This Draft Tanzania Standard is intended to provide guidance and technical 
evaluation on selection of components for footwear.  
0.2 In preparation of this Draft Tanzania Standard, assistance was derived from :- 
ISO/TR 20572:2007 -Footwear -performance require ments for components for footwear -
Accessories  
1.  Scope  
1.1 This Draft Tanzania Standard establishes the performance requirements for 
accessories (laces and eyelets, metal components and touch and close fasteners) for 
footwear (not for finished footwear) , irrespective of the material, in order to assess the 
suitability for the end use. It also establishes the test methods to be used to evaluate 
the compliance with the requirements.  
1.2 This Draft Tanzania Standard applies to accessories (laces a nd eyelets , metal 
components , touch  and close fasteners) for all kind of footwear.  
2.  Normative references  
2.1 For the purpose of This Draft Tanzania Standard, the following references shall 
apply : 
TZS 275: 20 14, Footwear — Glossary of terms  
TZS 276: 2018, Footwear method of sampling  
TZS 22:2018, Textile – Woven fabric -Determination of breaking load and extension  
TZS 2007 -2: 2017, Textiles —Dyestuffs —Part 2: General method for determination of 
extractable dyestuff including allergenic and carcinogenic dyestuffs (method using 
pyridine -water)   
2 
 ISO 22774, Footwear -test method for accessories: shoe laces -Abrasion resistance  
ISO 2275, Footwear -Test method for accessories: Metallic  accessories -Corrosion 
resistance  
ISO 22776, footwear -Test methods for accessori es: Touch and close fasteners -shear 
strength before and after repeated closing  
ISO 22776, footwear -Test methods for accessories: Touch and close fasteners -Peel 
strength before and after repeated closing  
3.  Terms and definitions  
For the purposes of this D raft Tanzania Standard , the te rms and definitions given in 
TZS 275 shall apply . 
4.  Requirements  
4.1General  
This specification  establishes performance requirements, all of which shall be taken into 
account. Expressing the results of a test  or analytical determination, as well as the 
average values, shall be rounded off in accordance with TZS 4: 2009  
When taken from finished footwear, samples shall  be prepared in accordance with TZS 
276: 2018  
 
 
 
 
 
  
3 
 4.2 The p erformance requirements for accessories  of footwear  for general purpose 
sports and school footwear  shall meet the requirement given in Table 1 below:  
Table 1 — Test methods and properties for general purpose sports and school footwear  
properties  Requirements  Test Method s 
Laces and 
eyelet  
 abrasion 
resistance  Method 1  15 000 cycles   
 
ISO 22774  Methods 2 and 3  15000 cycles  
Metal 
accessories  
 corrosion 
resistance  Method 1  No worse than grade 4   
 
 ISO 22775  Method 2  No worse than grade 4  
Touch and 
close  
 fasteners shear  
 strength  Before repeated 
closing  100 kPa ( minimum shear)   
 
ISO 22776  After repeated 
closing  80 kPa (after  5000 opening/closing 
cycles)  
Touch and 
close  
fasteners peel   
strength  Before repeated 
closing  0.10 N/mm (minimum peel)   
 
 ISO 22777  After repeated 
closing  0.08 N/mm (after 5000 opening/closing 
cycles)  
 
 
 
 
 
 
 
 
  
4 
 4.3 Performance require ments for accessorie s for casual, men's town, cold weather, 
women's town and fashion footwear shall meet  the requirement given in Table 2 below:  
Table 2 — Test methods and properties for casual, men's town,  cold weather, women' s 
town and fashion footwear  
properties  Requirements  Test method s 
Laces and eyelet  
 abrasion resistance  Method 1  10 000 cycles   
 
ISO 22774  Methods 2 and 3  10 000 cycles  
Metal accessories  
 corrosion 
resistance  Method 1  No worse than grade 4   
 
 ISO 22775  Method 2  No worse than grade 4  
Touch and close  
 fasteners shear  
 strength  Before repeated 
closing  70 kPa ( minimum shear)   
 
 
 
ISO 22776  After repeated 
closing  60 kPa  (after  5000 opening/closing 
cycles)  
Touch and close  
fasteners peel  
strength  Before repeated 
closing  0.08 N/mm (minimum peel)   
 
 
 
ISO 22777  After repeated 
closing  0.06 N/mm  (after 5000 
opening/closing cycles)  
 
 
 
 
 
 
  
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4.4 The p erformance require ments for accessories  for infants' and indoor footwear  shall 
meet the requirement given in Table 3 below:  
Table 3—Test methods and properties  for accessories for infants' and indoor 
footwear  
properties  Requirements  Test Methods  
Laces and 
eyelet  
 abrasion 
resistance  Method 1  5 000 cycles  ISO 22774  
Methods 2 and 3  5 000 cycles   
Metal 
accessories  
 corrosion 
resistance  Method 1  No worse than grade 4  ISO 22775  
Method 2  No worse than grade 4   
Touch and 
close  
 fasteners 
shear  
 strength  Before repeated 
closing  50 kPa ( minimum shear)  ISO 22776  
After repeated 
closing  40 kPa (after  5000 opening/closing 
cycles)   
Touch and 
close  
fasteners 
peel  
strength  Before repeated 
closing  0.08 N/mm (minimum peel)  ISO 22777  
After repeated 
closing  0.06 N/mm  (after 5000 o pening/closing 
cycles)   
 
 
 
 
 
  
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 4.5 The performance requirements for accessories all footwear shall meet the 
requirement given in Table 4  below:  
Table 4 : Test methods and requirements for all footwear  
SN properties  Requirements  Test method  
1 Eyelet/hook strength, N, min  
 Eyelet  
 Buckle  
 Decorative buckle   
150 
150 
60  
ISO 22774:2014  
 
2 Lace  
 Strength, N, min.  
 Sulphur dyes   
200 
No Sulphur dyes   
TZS 22: 2018  
Annex A  
3 Allergenic and Carcinogenic  No detection  TZS 2007 -2: 2017  
4 Lead, (as Pb), min  200ppm  Annex B  
5 Buckle/eyelet, reverts (corrosion 
resistance)   
No corrosion   
Annex C  
 
5.  Marking and labelling . 
 5. 1 In reference to this Draft Tanzania Standard, the accessories complying with all t he 
essential requirements can be marked  by the manufacturer either directly on the 
product or by a label with the following additional information:  
a) the manufacturer’s name, trade mark or identification mark.  
 b) the type of footwear for which the accessories shall  be used .  
5. 2 Additional requirements are due to the agreed between the component supplier and 
the footwear manufacturer may be specified in the marking or label, making referenc e to 
the agreed sample.  
 
6.  WORKMANSHIP AND FINISH  
6.1 The appearance, workmanship,  finish and all  other a spects not mentioned in this 
specification  shall be of acceptable for trading practice  similar to the approved sample  
and all  accessories shall be tested as per  specified  in table 1, 2, 3 and 4  
  
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 ANNEX  A 
METHOD FOR DETECTION OF SULPHER DYES IN BLACK COLOURED LACES  
A-1 Procedure  
A-1.1 Boil the laces in alkaline hydrosulphite solution for one minute. If the shade is 
reduced to pale brown or yellow colour and oxidation restored to the original colour, 
Sulphur  dyes shall be suspected to be present.  
A-1.2 For conformation, boil the laces in acid stannous chloride  solution in a test tube 
covered with a piece of filter paper moistened with lead acetate. A blackish/brown stain 
with metallic lustre confirms  the pres ence of sulphu r dyes.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
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 ANNEX B 
TEST FOR LEAD  
B-1Apparatus  
B-1.1 Nessler Cylinder - 50 ml capacity.  
B-1.2 Reagents  
B-1.3 P-Nitro phenol  Indicator Solution -Dissolve 0.29 of p -nitrophenol in hot water and 
dilute to 100 ml.  
B-1.4 Dilute Ammonium Hydroxide - 1: 9.  
B-1.5 Dilute Hydrochloric Acid - 1: 99.  
B-1.6 Hydrogen Sulp hide Solution -saturated and freshly prepared.  
B-1.7 Standar d Lead Solution - Dissolve 1.60 g of lead nitrate in water a nd make up the 
solution to 1000ml with wat er. Pipette out 10 ml of the solut ion and dilute again to 1000 
ml with water. One milliliter  of this solution contains 0 .01mg of lead (as Pb).  
B-2 Procedure - Weigh accurately 5 g of the material and thoroughly shake it with 25 ml 
of water for 5 minutes and filter. Take the filterate in a Nessler cylinder and add one 
drop of p -nitrophenol indicator solution. Add dilute ammonium hydroxide dropwise until 
the solution turns yellow. Add dilute hydrochloric acid dropwise until the sol ution 
becomes colour - less and then add 0 .5ml of the acid in excess. Add 5 ml of hydrogen 
sulphide solution  dilute to the mark and mix well. Carry out a control test in a similar 
manner in another Nessler cylinder using 1ml of standard lead solution taken as  not 
having been exceeded if the intensity of colour produced with the material is not greater 
than produced in the control test. 
 
 
 
 
 
 
  
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 ANNEX C  
CORROSION TEST  
C-1 Chemical  
Sodium chloride test solution, one percent solution  
C-2 Test piece  
Three numbers of  test pieces from the lot.  
C-3 Apparatus required  
C-3.1Dessicator  
C-3.2 Air Circulating Oven  
C-4 PREPARATION OF SAMPLES  
C-4.1 Soak a large piece of washed, bleached cotton fabric in the sodium chloride test 
solution.  
C-4.2 Allow the fabric to dry.  
C-4.3 Cut the fabric up into small  strips, approximately 6cm × 3 cm. 
C-4.4 The metallic trims/components are wrapped in the fabric and bound with a thread 
to ensure contact.  
C-5 PROCEDURE  
C-5.1 Lay the dry test pieces in a dish.  
C-5.2 Place the dish in a dessi cator with a little distilled water, and store for 3 days at 
35◦C. 
C-6 EVALUATION  
Visually examine the metallic trims/components for signs of corrosion and include the 
outcomes in the test report.