tbs             T DC2(5603) P3 
 
 
 
 
 
 
 
 
 
 
 
DRAFT TANZANIA STANDARD  
Footwear  – Canvas shoes -Specification  
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARDS  
 
1 
  
Draft Tanzania Standard                                      TDC2  (5603) P 3 
Footwear -Canvas shoes Specification  
 
0.  Foreword  
0.1Canvas shoes are among the widely used in sports, training, casual  and other 
general purposes. This D raft Tanzania Standard lays down basic requirements for 
canvas shoes in order to assist the manufacture rs to produce the products that are of 
acceptable  quality and value.  
0.2 In deciding whether a particular requirement of this Draft Tanzania Standard is 
compl ied with, the final value observed  or calculated , expressing th e result of a test or 
analysis shall be rounded off in accordan ce with TZS 4:2009 -Rounding off numerical 
values . 
0.3 In the preparation of this Draft Tanzania Standard assistance was derived fr om:  
IS 3735: 2003: Canvas shoes, rubber sole -Specification, published by t he Indian 
Standards Institution  
1.  Scope  
This Draft Tanzania Standard describe the requirements, methods of sampling and test  
method for  canvas shoes having  sole and heel made from  Rubber, Thermoplastic 
rubbers (TPR) , polyvinyl chloride ( PVC), Polyurethane  (PU)and Ethylene  Vinyl Acetate 
(EVA) . 
 
 
 
 
  
2 
  
2.  NORMATIVE R EFERENCE  
For the purpose of this Draft Tanzania Standard, the following references shall apply:  
a) TZS 530: 2016 4–Textiles–Test for colour fastness -colourfastness to rubbing  
b) TZS 534: 2016  –Textiles -Standard atmospheres for  conditioning and  testing  
c) TZS 40: 2017 –Textiles -test for colour fastness to light:  daylight  
d) TZS 280: Textiles –Test for colour fastness to perspiration  
e) TZS 20: 2017 –Textiles -woven fabrics - Determination of number of threads per unit 
length.  
f) TZS 4: 2009 – Rounding off numerical values  
g) TZS 21:  2016 –Textiles -woven fabrics – Determination of mass per unit length and 
per unit area . 
h) TZS 22: 2018 –Textiles – Tensile properties of fabrics - Part 1: Determination of 
maximum force and elongation at maximum force using the strip method  
i) TZS 44: 2017 –Textiles -Woven or knitted fabrics -Determination of length and width  
j) TZS 250:  1985 –Method for determination of absorbency of absorbent textile 
material.  
k) TZS 663: 2012 –Textiles – Cotton woven canvas materials – Specification  
l) TZS 695: 2011 –Size designation and body measurement procedure  
m) ISO22774: 2014 –Footwear –Test methods  for accessories: shoe laces –Abrasion 
resistance  
n) ISO 17697:2016 –Footwear -Test methods fo r uppers, lining and insocks -Seam 
strength  
 
 
 
  
3 
 3.  TERMINOLOGY  
For the purpose of this Draft Tanzania Standard, definitions given in TZS 275:1986 
Footwear -Glossary of terms shall apply.                                                                                                    
4. REQUIREMENTS  
4.1 Upper  
The upper materials shall consist of c anvas or  any other heavy  weight fabric  of 
acceptable quality  with or without solid PVC, a polyurethane  coating or a coagulated 
polyurethane material  
4.1.1  The upper shall consist of  canvas fabric made from cotton, man-made or blended 
fibres. The inner layer shall  consist of drill or any other fabric of acceptable quality  and 
both fabric upper and inner shall be firmly adhered together with rubber compound to  
produce an adequate bond between the materials . 
4.1.2  The shade of canvas upper shall  match that of inner or any other shade as agre ed 
to between the supplier  and buyer . 
4.1.3 The colour fastness of the fabrics described in 4.1.1 shall comply with t he 
requirements given in Table 1 . 
4.2 Binding Material  
Binding used on canvas shoes shall be of cotton, manmade or blended fabric or fabric -
supported PVC of acceptable  quality. A top edge tape shall be stitched in during the 
application of the binding.  
4.2.1  The colour of the tape shall match the shade of the upper or any other shade as 
agreed to between the supplier and buyer.  
4.2.2  The colour fastness of the tapes shall comply wi th requirements given in Table 1  
4. 3 Threads for upper assembling  
The threads used for attaching the various upper components shall  comply with the 
relevant requirement given in Table 1 . The colour of the threads sha ll match that of the 
shoe upper  material, unless a contrasti ng colour is part of the design. The colour  
fastness of the threads shall comply with the requirement give n in Table 1  
 
 
 
  
4 
 4.4 Closure fittings  
4.4.1 Eyelets  
Eyelets shall be  properly clenched without any distortion . They may be  of the visible -
setting or invisible -setting type and shall be of aluminum, brass, brass -coated steel  
eyelets or of a corr osion -resistant metal or otherwise coated to a shade matching  the 
colour of the upper material.  
4.4.2 Laces  
Laces shall be of acceptable quality of natural or blends of fibres , and of braided 
construction, fused and uniform matching to the shade of the upper or as agreed to 
between the supplier and buyer , other requirement s shall comply with the requirement 
given in T able 2  
4.4.3  Sole and heel  Component  
The sole and heel components  shall conform to th e requirement given in Table 2  
4.5 Shape and Design  
4.5.1 Thedesign of the shoe shall be as agreed to between the supplier and buyer.  
4.5.2 The size and fi tting of the shoes shall be as TZS 695 : 2011, Size designation and 
body measurement procedure.  
5.  WORKMANSHIP AND FINISH  
5.1 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 .  
5.2Unless otherwise agreed to between the supplier and buyer, t he upper shall be 
stitched on a lock stitch machine and the number of sti tches shall be 30 to 40 per dm.  
5.3The shoes shall be free from folds, bow and skewness  in the upper blisters 
embedded foreign matters and excessive surface marking . 
5.4A rubber  foxing shall be fixed all-round  the sole and heel. The colour shall be as 
agreed to between the supplier and buyer. The foxing shall not be less than 18mm wide 
and shall not extend beyond the edges of the sole at the bottom.  
 
 
  
5 
 Table 1: Requirements for Canvas and drill  materials  
SN Characteristic  Requirement  Method of Test  
1 
 Canvas fabrics:  
Breaking load in N, Min   
 
500 
  
 
TZS 22: 2018  
 2 Drill Fabrics :  
Breaking load in N, min  
3 Colour fastness to:  
i.  Light  
ii. Washing  
iii. Perspiration  
iv. Rubbing   
5 or better  
4 or better  
4 or better  
3 or better   
TZS 23:2016  
TZS 24:2016  
TZS 280: 2016  
TZS 530: 2016  
 
Table 2: Physical r equirement for the whole canvas shoes  
S
N characteristic  Requirements  Test method  
Sole  Heel  
1 Adhesion strength  to sole  (N), min.  
 PU/TPU/PVC  
 Rubber/TPR  
 EVA  
250 
150 
100  
300 
200 
150  
TZS 277: 1985  
2 Hardness, IRHD  60±5  ASTM D 2240 -5 
3 Thickness of the sole (mm), min  4 TZS 205: 1984  
4 Abrasion resistance of the sole (mm3), 
min 300 TZS 412: 1989  
5 Eyelet/hook strength , N, min  
 Eyelet  
 Buckle  
 Decorative buckle   
150 
150 
60  
ISO 22774:2014  
 
6 Water penetration, 3h  None  Visual 
7 Lace 
 Strength , N,min.  
 Sulphu r dyes   
200 
No Sulphur  dyes   
TZS 22: 2018  
Annex A  
8 Seam strength, N, min  20 ISO 17697:2016  
9 Outsole abrasion resistance ,mm3, min  150 TZS 412: 2015  
10 Allergenic and Carcinogenic  No detection  TZS 2007 -2: 2017  
11 Lead, (as Pb) , min  200ppm  Annex B  
12 Buckle/eyelet, reverts (corrosion 
resistance)   
No corrosion   
Annex C  
 
*IRHD - International Rubber hardness Degree   
6 
 6.  PACKING AND MARKING  
Each pair of shoes may be wrapped in  non-woven bag and  packed in an individual box 
in order to protect them from damage during transportation, storage and handling  
6.1 Marking  
6.1.1 Shoes  
The following information shall appear in neat, legible marking on each shoe:  
a) The size of the shoe  
b) The manufacture’s name or trade mark  
c) The design of the shoe  
d) That the uppers are of a non -leather material (if relevant) and  
e) Any further information required by purchaser  
 
6.1.2 Boxes  
Each box shall bear the following information given in neat and legible marking at a 
position that is visible when boxes are stacked:  
a) The manufacturer’s name or trademark;  
b) The size of the shoes;  
c) The design of the shoe;  
d) Any further information required by the purchaser.  
 
7. INSPECTIONS, SAMPLING, CRITERIA OF CONFORMITY AND METHODS OF 
TEST  
7.1 Inspection, scale of sampling and criteria of conformity of footwear manufactured 
according to this standard shall be drawn as prescribed in TZS 276: 1986  
7.1.1 Without dismantling th e shoes, visually exam ine each shoe  in the sample for 
compliance with as many relevant requirement of this Draft Tanzania Standard as 
possible.  
7.1.2 For submitted test sample, dismantle a shoe at each stage and prepare 
specimens to carry out the relevant tests for compliance of the requirements of this 
Draft Tanzania Standard given in Table 1 and Table 2 .  
7.1.3The fabric and tapes shall be free from Sulphur  dyes when tested in  accordance to 
test method explained in Annex A.   
7 
 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 presence of sulphu r dyes.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
8 
 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 water. 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. 
 
 
 
 
 
 
  
9 
 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.