意味と使い方
5.1 This practice should only be used to compare samples of the same material and the same general appearance. 例えば, a range of specimens to be compared should have roughly similar lustre, texture and (if not opaque) thickness and semi-transparency.
5.2 For yellowness measurements, this practice is limited to samples whose main wavelength is in the range 570 to 580nm or whose Munsell hue is approximately 2.5GY to 2.5Y. For whiteness measurements, this practice is limited to samples with Munsell values greater than 8.3 (CIEY greater than 65) and Munsell chromaticity no greater than 0.5 (B tone) and Munsell chromaticity no greater than 0.5 (Y tone 0.8) and all other tones of 0.3 (見る 3.3.1).
5.3 The combination of measurement and calculation that results in a yellow or white index is a psychophysical process, あれは, the specified procedure is designed to provide numbers relevant to visual estimates made under specific typical observation conditions. Since visual observation conditions vary widely, users should compare the calculated index with visual estimates to ensure applicability. Some standards that address color and chromatic aberration vision estimation are Practices D1535, D1729, E1360, and E1541, as well as guidelines E1499.
5.4 This practice does not include specimen preparation, a procedure that can have a significant impact on the amount measured. 通常, samples should be prepared and presented for measurement in a standard manner for the tests performed. Select enough samples or sample areas to provide average results representative of each sample under test. See Practice E1345.
器械色座標を使用した黄色度指数と白色度指数の計算
範囲
1.1 This practice provides numbers associated with visual ratings of yellow or white for color specimens of white and near-white or colorless objects, viewed in daylight by observers with normal color vision. White textiles, paints and plastics are some of the materials that can be described by the yellow or whiteness index calculated in this way.
1.2 In order to perform a complete analysis of object color by a specified observer and a specified light source, three parameters need to be used. しかし, for near-white specimens, it is often useful to calculate a singular scale of yellowness or whiteness. This practice provides recommended equations for this scale and discusses their derivation and use, as well as the limits of their applicability (see also References (1) 2).
1.3 SI 単位で表された値は標準値として扱われます。. この規格には他の測定単位は含まれていません.
器械色座標を使用した黄色度指数と白色度指数の計算
1.4 この規格はすべてに対処することを目的としたものではありません, もしあれば, その使用に伴う安全性の懸念. 適切な安全性を確立するのは、この規格のユーザーの責任です。, 健康および環境慣行を確認し、使用前に規制制限の適用可能性を判断するため.
1.5 この国際規格は、国際規格開発の原則に関する決定で確立された国際的に認められた標準化原則に基づいています。, WTO貿易の技術的障壁に関する委員会が発行したガイドラインと勧告.