意味と使い方
5.1 This test method is designed to induce color changes in sealants and their component pigments related to the conditions of end use, 太陽光の影響も含めて, 湿気と熱. The exposures used in this test method are not intended to simulate color changes in sealants caused by local weathering phenomena, 大気汚染などの, 生物攻撃, and saline exposure.

5.2 実験用光源を使用した装置で露光を行う場合, it is important to consider how the manual test conditions will reproduce the performance variations and failure modes associated with the final use environment of the sealant under test. Information on the use and interpretation of accelerated exposure test data is provided in Practice G151.

5.3 When this test method is used as part of the specification, the exact procedure, 試験条件, test duration and evaluation techniques need to be specified. Due to the different spectral power distribution of the light sources (fluorescent ultraviolet and xenon arc), the results obtained between the two procedures may differ. Sealants should not be compared to each other based on results obtained in different types of equipment.

5.4 These devices are well matched to ultraviolet solar radiation. しかし, for sealants that are sensitive to long wavelength ultraviolet and visible solar radiation, the absence of such radiation in fluorescent ultraviolet devices will distort the color stability ranking compared to external environmental exposure.

注記 1: For a complete cautionary guide on laboratory ageing of non-metallic materials, see Practice G151.

ASTM C1501-2019 実験室加速老化手順による建築構造用シーラントの耐変色性を評価するための標準試験方法

半径
1.1 This test method describes laboratory accelerated aging procedures for the determination of color stability of building construction sealants using fluorescent ultraviolet or xenon arc test devices.

1.2 The color stability rankings provided by these two programs may not be consistent.

1.3 SI 単位で表される値は標準とみなされます。. 括弧内の値は参考値です。.

1.4 There is no equivalent ISO standard for this test method.

1.5 この規格は、すべての安全上の懸念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, その使用に関連する. 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.

1.6 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。, 世界貿易機関の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.