DUS 2004: 2018, Standard Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates, First Edition.

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通告成员：

Uganda

通告类型：

TBT

通告发布时间：

2018-07-13

评议截止时间：

2018-09-11

通告描述：

This Draft Uganda Standard provides numbers that correlate with visual ratings of yellowness or whiteness of white and near-white or colorless object-color specimens, viewed in daylight by an observer with normal color vision. White textiles, paints, and plastics are a few of the materials that can be described by the indices of yellowness or whiteness calculated by this practice.

For a complete analysis of object colors, by a specified observer and under a specified illuminant, use of three parameters is required. For near-white specimens, however, it is often useful to calculate single-number scales of yellowness or whiteness. This practice provides recommended equations for such scales and discusses their derivations and uses, and limits to their applicability.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

文档编号：

G/TBT/N/UGA/885

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ICS Code：

59.080.01 - Textiles in general;83.080 - Plastics;87.040 - Paints and varnishes

HS Code：

3209 - Paints and varnishes, incl. enamels and lacquers, based on synthetic polymers or chemically modified natural polymers, dispersed or dissolved in an aqueous medium
3208 - Paints and varnishes, incl. enamels and lacquers, based on synthetic polymers or chemically modified natural polymers, dispersed or dissolved in a non-aqueous medium; solutions of products of subheading 3901 to 3913 in volatile organic solvents, containing > 50% solvent by weight (excl. solutions of collodion)

通告目的：

Prevention of deceptive practices and consumer protection (TBT)
Protection of human health or safety (TBT)
Harmonization (TBT)

DUS 2004: 2018, Standard Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates, First Edition.

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