G/TBT/N/UGA/876  
 
13 July 2018  
(18-4388) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member: UGANDA   
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible: Uganda National Bureau of Standards  
Name and address (including telephone and fax numbers, email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:   
3. Notified under Article 2.9.2 [  ], 2.10.1 [  ], 5.6.2 [X], 5.7.1 [  ], other:  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable): Painted 
panels, plastic plaques, textile swatches.  
Paints and varnishes (including enamels and lacquers) based on synthetic polymers or 
chemically modified natural polymers, dispersed or dissolved in a non -aqueous medium; 
solutions as defined in Note 4 to this Chapter. (HS 3208), Paints and varnishes (including 
enamels and lacquers) based on synthetic polymers or chem ically modified natural 
polymers, dispersed or dissolved in an aqueous medium. (HS 3209). Paints and varnishes 
(ICS 87.040).  
5. Title, number of pages and language(s) of the notified document: DUS 1994: 2018, 
Standard Practice for Calculation of Color Tol erances and Color Differences from 
Instrumentally Measured Color Coordinates, First Edition. (21 page(s), in English)   
6. Description of content: This Draft Uganda Standard covers the calculation, from 
instrumentally measured color coordinates based on da ylight illumination, of color 
tolerances and small color differences between opaque specimens such as painted panels, 
plastic plaques, or textile swatches. Where it is suspected that the specimens may be 
metameric, that is, possess different spectral curve s though visually alike in color, Practice 
D4086 should be used to verify instrumental results. The tolerances and differences 
determined by these procedures are expressed in terms of approximately uniform visual 
color perception in CIE 1976 CIELAB opponent -color space, CMC tolerance units, CIE94 
tolerance units, the DIN99 color difference formula given in DIN 6176, or the new 
CIEDE2000 color difference units.  
7. Objective and rationale, including the nature of urgent problems where 
applicable: Prevention of deceptive practices and consumer protection; Protection of 
human health or safety; Harmonization  
8. Relevant documents:   
1. ASTM D1729  Practice for Visual Appraisal of Colors and Color Differences of 
Diffusely -Illuminated Opaque Materials  
2. ASTM D4086  Practice for Visual Evaluation of Metamerism  G/TBT/N/UGA/876  
 
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  3. ASTM E284  Terminology of Appearance  
4. ASTM E308  Practice for Computing the Colors of Objects by Using the CIE System  
5. ASTM E805  Practice for Identification of Instrumental Methods of Color or Color -
Difference  Measurement of Materials  
6. ASTM E1164  Practice for Obtaining Spectrometric Data for Object -Color Evaluation  
7. DIN 6176  Farbmetrische, Bestimmung von Farbabständen bei Körperfarben nach 
der DIN99 -Formel  
9. Proposed date of adoption:  December 2018  
Proposed date of entry into force:  Not applicable  
10. Final date for comments: 60 days from notification  
11. Texts available from: National enquiry point [X] or address, telephone and fax 
numbers and email and website addresses, if available, of other body: