Arti dan kegunaannya
5.1 This test method is designed to induce color changes in sealants and their component pigments related to the conditions of end use, including the effects of sunlight, moisture and heat. The exposures used in this test method are not intended to simulate color changes in sealants caused by local weathering phenomena, seperti polusi atmosfer, biological attack, and saline exposure.

5.2 Saat melakukan pemaparan pada peralatan menggunakan sumber cahaya laboratorium, 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, kondisi pengujian, 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. Namun, 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.

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

Metode Uji Standar ASTM C1501-2019 untuk Mengevaluasi Tahan Luntur Warna Sealant Struktural Bangunan dengan Prosedur Penuaan yang Dipercepat di Laboratorium

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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 Nilai yang dinyatakan dalam satuan SI harus dianggap standar. Nilai yang diberikan dalam tanda kurung hanya untuk referensi.

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

1.5 Standar ini tidak dimaksudkan untuk mengatasi semua masalah keselamatan, jika ada, terkait dengan penggunaannya. Merupakan tanggung jawab pengguna standar ini untuk menetapkan keselamatan yang sesuai, praktik kesehatan dan lingkungan dan untuk menentukan penerapan pembatasan peraturan sebelum digunakan.

1.6 Standar internasional ini didasarkan pada prinsip-prinsip standardisasi yang diakui secara internasional yang ditetapkan dalam Keputusan Prinsip-Prinsip Pengembangan Standar Internasional, Pedoman dan Rekomendasi yang dikeluarkan oleh Komite Hambatan Teknis Perdagangan Organisasi Perdagangan Dunia.