CDC 13( 940) DTZS  
 
ICS 71.100.40  
 
 
 
 
  
 
 
 
 
DRAFT TA NZANIA STANDARD 
 
 
 
 
 
 
 
 
 
 
 
Surface polish  — Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU  OF STANDARDS 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
1st edition 
© TBS 2022 
 
 CDC 13(210) CD 2 
 
   
 
 Foreword  
This Draft Tanzania Standard is being  prepared by the Paints and varnishes Technical Committee 
under the supervision of Chemicals Divisional Standards Committee and it is in accordance with the 
procedures of the Bureau.  
During the preparation of this standard reference was made to Uganda  Standard US 1674:2017, 
Surface polish — Specification , published by Uganda National  Bureau of  Standards . 
For the purpose of deciding whether a particular requirement of this standard is complied with, the 
final value observed or calculated expressing the result(s) of a test or analysis shall be rounded off in 
accordance with TZS 4 . The number of significant places retained in the rounded off value should be 
the same as that of  the specified value in this standard.  CDC 13(940) DTZS  
© TBS  – All rights reserved  1 
 DRAFT TANZANIA STANDARD           CDC 13( 940) DTZS  
Surface  polish  — Specification   
1. Scope  
This Draft Tanzania Standard specifies requirements, sampling and test methods  for wax-based  polishes 
in form of paste and liquid applicable to polishes intended for use on plastics, leather, rubber, finished 
furniture and car interiors like dashboards and leather seats.  
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.  
ISO 4618, Paints and varnishes — Terms and definitions  
TZS 59/ISO 3696 Water for analytical laboratory use – Specification and test method  
TZS 526, Paints and varnishes – Determination of volatile and non -volatile matter  
TZS 1887/ISO 1516 Determination of flash/no flash — Closed cup equi librium method  
ISO 4625 -1, Binders for paints and varnishes — Determination of softening point — Part 1: Ring -and-ball 
method  
TZS 524 , Paints and varnishes – sampling  
 
3. Terms and definitions  
For the purposes of this document, the terms and definitions given in ISO 4618 and the following apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
 
3.1  
ambient temperature  
temperature between 21 °C and 38 °C  
 
3.2  
flash Point  
lowest temperature of the test portion, corrected to a barometric pressure of 1 013 kPa, at which application 
of a test flame causes the vapour of the test portion to ignite and the flame to propagate across the surface 
of the liquid, under the specified c onditions of test  
 
3.3  
lot  
unit of production that, as far as practicable, consists of production units of a single type, class, size and 
composition, manufactured under the same conditions and at substantially the same time  CDC 13(940) DTZS  
© TBS  – All rights reserved  2 
 4. Requirements  
4.1 General requirements  
4.1.1  Description  
4.1.1.1  Paste  
The polish shall consist essentially of natural or synthetic waxes and solvents in suitable proportions.  
4.1.1.2 Liquid  
The polish shall consist of natural or synthetic waxes or a mixture of both, volatile aliphatic solvent, polishing 
oils, either emulsified in water or wax -solvent mixture to form a stable, free flowing liquid that can be readily 
dispersed upon shaking . 
4.1.2  Consistency  
4.1.2.1 Paste   
The polish shall  
• be of smooth, homogenous, semi -solid mass and free from gritty material.  
• not flow at ambient temperature and shall not show appreciable shrinkage at the edges.  
• have no tendency for separation of solvents or crystallization of ingredients when tested in 
accordance with Annex A.  
4.1.2.2 Liquid  
The material shall be easily pourable, free flowing and homogenous, free from any grit and sedimentation. 
It shall have no tendency of separation or crystallization of the constituent material when tested in 
accordance with Annex A.  
4.1.3 Odour  
The polish shall not have any objectionable odour  
4.1.4 Colour  
The polish shall not impart any colour of its own to the polished surface . 
4.1.5 Applicability and polishing propert ies 
4.1.5.1  The polish shall  
• not crumble or dry rapidly.  
• give gloss which shall be free from greasiness or tackiness.  
• remove ingrained dirt and grease from the surface.  
• neither be slippery nor show any resistance to easy application.  
4.1.6 Toxicity  
The polish sh all have no adverse effects on human health and environment when used for its intended 
purpose.  CDC 13(940) DTZS  
© TBS  – All rights reserved  3 
 4.2 Specific requirements  
The polish  shall comply with specific  requirements given in Table 1 when tested in accordance with the test 
methods therein.  
Table 1 — Specific requirements for Surface  polish  
S No.  Parameter  Requirement  
Test method  
Paste  Liquid  
(i)  Non-volatile matter content, % 
(m/m)  20 - 35 7 - 17 TZS 526 
(ii)  Consistency  To pass test  Annex A  
(iii)  pH of water extract  6.5 – 9.5 Annex B 
(iv)  Ash contents  of non -volatile 
matter, % (m/m) , max  1.5 Annex C 
(v)  Flash point of organic solvent, 
°C min . 30 TZS 1887/ISO 
1516  
(vi)  Drying time, at ambient 
temperature, min, max  10 Visual   
(vii)  Softening point of non -volatile 
matter, °C min.  60 N/A ISO 4625 -1 
 
5. Packaging  and labelling  
5.1 Packaging  
The container (including the closure) in which the polish is packaged shall not interact chemically or 
physically with the polish and shall be strong enough to protect the polish adequately during normal 
handling, transportation and storage.  
 
5.2 Labellin g  
The container  shall be labelled either in English, Kiswahili or both as agreed between the manufacturer 
and the supplier with the following information:  
 
 
a) name of the product;  
b) type of the polish;  
a) manufacturer's name and physical address;   
b) registered trade mark if any;  
c) batch/code number;  
c) net content;  
d) safety precaution  
d) instructions for use;  
e) country of origin; and  
f) dates of manufacture and expiry.  
 
 CDC 13(940) DTZS  
© TBS  – All rights reserved  4 
 6. Sampling  
Sampling shall be done in accordance with TZS 524  
7. Quality of reagents  
Analytical grade reagents and water for analytical use as specified by TZS 59/ISO 3696 shall be used for 
the appropriate tests.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 CDC 13(940) DTZS  
© TBS  – All rights reserved  5 
 Annex A  
(normative)  
 
Determination of consistency  
 
A.1 Paste  
A.1.1 Maintain an original unopened container of polish at 10 °C ± 2 °C for two hours. Open the lid and 
examine as given in A.1.1.1 and A.1.1.2.  
A.1.1.1  No liquid shall separate from the semisolid mass.  
A.1.1.2  The polish shall be soft and smooth to touch and capable of being taken up readily with a brush or 
cloth without crumbling.  
A.1.2 Repeat the above series of examinations on another container maintained at a temperature of 45°C 
± 2°C for two hours. The polish shall pass the test in accordance with A.1.2. 1 and A.1.2.2.  
A.1.2.1  The material shall not flow or run if the container is tilted.  
A.1.2.2  The separation of a few drops of the solvent shall not be considered a failure to meet this test, if 
they are re -absorbed when the paste is brought to ordinary temperature.  
 
A.2 liquid  
A.2.1 Maintain an original unopened container of polish at 10 °C ± 1 °C for two hours. Open the lid and 
examine as given in A.2.1.1 and A.2.1.2  
A.2.1.1  No liquid shall separate from the homogenous liquid mass.  
A.2.1.2  The polis h shall easily be pourable and applicable.  
 
A.2.2 Repeat the above series of examinations on another container maintained at a temperature of 45°C 
± 1°C for two hours.  
No solid shall separate from the homogeneous liquid.  
 
 
 
 
 
 
 
 
 
 CDC 13(940) DTZS  
© TBS  – All rights reserved  6 
 Annex B  
(normative)  
 
Determination of pH  
 
 
B.1 Paste  
Procedure  
Add about 15 g of the material to 100 ml of water in a beaker. Heat with stirring till all the wax has melted. 
Allow to cool to a temperature of 27 °C ± 2 °C. Separate the aqueous layer from the wax cake and determine 
its pH using a pH meter . with a glass electrode.  
 
B.2 liquid  
Determine the pH on the undiluted sample by a suitable pH meter ., using gIass electrode . 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 CDC 13(940) DTZS  
© TBS  – All rights reserved  7 
 Annex C 
(normative)  
Ash content  
 
These methods determine the ash contents in waxes, polishes and other related materials.  
C.1 Procedures  
C.1.1 Method A  
Melt a portion of non -volatile matter  and stir thoroughly. Accurately weigh  a mass of a 3 g sample (to the 
nearest mg) in a tarred crucible. Burn off the combustible matter slowly and ignite the residue to constant 
mass at a 700 ºC . 
Ash content, percent = mass  of residue  
mass  of sample ×100 
C.1.2 Method B  
Weigh  a mass of sample (to the nearest mg) containing about 2 g of non -volatile  matter in a tarred porcelain 
crucible. Evaporate the volatile matter and burn the combustible  matter slowly by igniting to constant mass.